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The U.S. waste management industry moves more than 290 million tons of municipal solid waste each year. This is a potential trillion-dollar market, but much of the work still relies on paper tickets, clipboards, and spreadsheets. About 10,000 independent haulers handle a large share of collection and materials transfer in the U.S. In this business, a single truck costs $300,000, and profits depend on efficient routes. Most haulers do not have access to the digital tools that other logistics industries have used for years. Mike Marmo, CEO and founder of CurbWaste, is building a new operating system to change this. His goal is to create the data foundation needed for the circular economy to work. He is a fourth-generation waste industry professional who started his career as a scale operator at a family transfer station in New York and sold a hauling business in 2021. Since then, he’s built CurbWaste into a platform serving more than 150 haulers in 40 states. Its CurbPOS system for transfer stations tracks inbound and outbound materials with scale integration. It generates automated LEED diversion reports and Recycling Certification Institute-certified documentation; the per-load, per-material chain-of-custody data that extended producer responsibility programs need, as seven states now require producers to fund and document the recycling of their packaging.
Mike Marmo, Founder & CEO of CurbWaste, is our guest on Sustainability In Your Ear.
Mike made a simple but important point: “Waste is being created when it’s being manufactured.” The waste management industry reflects the economy and could become the base for a circular supply chain that keeps materials in use. Mike compares this to Amazon, which learned about buyer behavior and then built warehousing, freight, and delivery systems around that knowledge. The waste industry can do something similar. By tracking what is produced, where it goes, and where it ends up, haulers and new operators can work together on a shared digital system that gives full visibility of materials. Mike calls this the “waste meter,” and he thinks an AI-powered circular economy could be in place within 10 years. Accenture research estimates that the circular economy could add $4.5 trillion in economic output by 2030, a number supported by the United Nations Development Program. Right now, investment is far below what is needed to reach that potential. CurbWaste is working to build the transparency needed to connect collection and vision, helping turn a fragmented industry into a circular supply chain. To learn more, visit curbwaste.com.
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Interview Transcript

Mitch Ratcliffe  0:00

Hello, good morning, good afternoon or good evening, wherever you are on this beautiful planet of ours. Welcome to Sustainability In Your Ear. This is the podcast conversation about accelerating the transition to a sustainable, carbon-neutral society, and I’m your host, Mitch Ratcliffe. Thank you for joining the conversation.

Today, we’re going to take another dive into the circular economy, this time about how we manage our waste collection and processing systems. The U.S. waste management industry moves more than 290 million tons of municipal solid waste a year. It’s a potential trillion-dollar market, yet much of it still runs on paper, tickets, clipboards, and spreadsheets. Roughly 10,000 independent haulers handle a significant share of American collection and materials transfer, and they work in a business where a single truck costs $300,000 and profitability depends on route efficiency. Yet most of these haulers lack access to the digital infrastructure that other logistics-centric industries adopted a decade ago.

Now that society recognizes the immense value in waste—that it’s not just something to dispose of as quickly and quietly as possible, to manage for profitable reuse in a growing circular economy—the waste management industry is in the midst of a vast upgrade.

And our guest today is Mike Marmo, the CEO and founder of CurbWaste, an end-to-end operating system built for independent waste haulers. Mike is a fourth-generation waste industry professional. His great-grandfather started in the business, and Mike started his career working at a family transfer station in New York. Then he built his own collection and disposal hauling company called Curbside, and when COVID shutdowns wiped out three months of construction-dependent revenue, he pivoted to focus on the software platform his hauling company had built. He sold that hauling business in 2021 and has spent the years since building CurbWaste into a platform that now serves more than 150 haulers across 40 states, from five-truck family operations to 200-vehicle regional fleets.

CurbWaste brings order management, real-time dispatch, route optimization, automated invoicing, driver apps, and e-commerce into a single cloud-based platform. Its CurbPOS point-of-sale system for transfer stations tracks inbound and outbound materials with scale integration, and uses weighted averages by material type to generate automated LEED diversion reports and Recycling Certification Institute certified documentation. In other words, it helps a hauler qualify for environmental incentives that gives contractors and developers defensible, third-party verifiable proof that their construction waste was actually diverted from a landfill. And that, too, creates another economic opportunity.

The per-load, per-material chain-of-custody data is what the emerging extended producer responsibility programs that we’ve discussed many times need, as seven states now require producers to fund and document the collection, sorting, and recycling of their packaging. So if you put this operating system under the circular economy, you start to track the value flow, and that means more value can be recognized and rewarded.

In October, CurbWaste closed a $28 million Series B round led by Socium Ventures—that’s the venture capital arm of Cox Enterprises—bringing its total funding to $50 million. The investment is fueling AI-powered business intelligence tools designed to give independent haulers the kind of data-driven decision making that larger competitors like Waste Management and Republic Services have built in their own proprietary systems.

We’ll talk with Mike about what it takes to digitize an industry that’s resisted technology adoption for decades, how CurbPOS’s materials tracking could extend from LEED compliance into EPR reporting and regional materials flow planning, and whether a network of independent haulers on a shared platform can become a connective tissue for an emerging circular economy supply chain. And finally, what is AI actually delivering for waste operations today compared to the hype we’re hearing?

You can learn more about CurbWaste at curbwaste.com—CurbWaste is all one word, no space, no dash.

So, can a software platform that modernizes independent hauling also help build the data infrastructure for the circular economy? Let’s find out right after this quick commercial break.

[COMMERCIAL BREAK]

Welcome to the show, Mike. How you doing today?

Mike Marmo  4:42

I’m doing well. How are you doing?

Mitch Ratcliffe  4:44

Doing well. It’s a beautiful day here in Southern Oregon, and I know in New York City you’re getting through the snow.

Mike Marmo  4:51

Yes, it’s really cold.

Mitch Ratcliffe  4:53

I want to start off with this question, and it goes back to the fact that your great-grandfather started this business, or started in this business. Walk us through the paper and digital processes that recycling operations have been using, and how CurbPOS changes their day-to-day work.

Mike Marmo  5:07

Yeah. So my family had grown up in this, you know, been in this business. I had grown up in this business. Actually, my first job, I was a scale operator starting at a transfer station. And when I was working there, everything was pen to paper. You know, we used a traditional scale ticket. We would put it through this, you know, the EXP printer.

And, you know, within that first year of really working there, I started to realize how difficult it was and how much manual work was happening. You know, a lot of the requests that we were getting at that facility—it was a C&D facility—a lot of the requests we were getting were for LEED, or for something that was related to a regulatory compliance effort, and to get all that information was fairly difficult. So we, you know, at that point, I really understood kind of where the waste industry was relative to the technology around me and my regular day-to-day life, and when I started a waste company, and then ultimately ended up starting a software company, I really saw it at scale, working with a lot of companies around the country that are starting pen to paper or operating off kind of archaic systems.

And so when we originally built CurbWaste and then the CurbPOS product, which is for the transfer stations and recycling centers, we really hyper-focused on automating tasks and making sure that everything was as digital as possible for aggregation of data. So I think we’re starting to see adoption along the way, and I think the waste industry is progressing, but ultimately, I think a digital experience is necessary. And I think it’s for the future of the industry and for the future of the way that we operate in our waste streams. I think it’s critical.

Mitch Ratcliffe  6:45

When you pivoted from moving trash to selling software, how did that change your view of the system that you’d been working in?

Mike Marmo  6:52

Yeah, so New York, obviously, is fairly unique. We were operating the five boroughs, and there are many limitations, regulatory compliance. It’s very difficult to navigate logistically—you know, so many people, and limited parking, limited space, very tight. So you know, when you’re operating in that bubble, you don’t have a lot of options on how you have to operate. You have to be really, really good and really, really pointed.

But then once we moved into the software space, and we started to see, you know, around the country, how people operate, the term I like to use always is “local,” because it really is. You know, we’re all fundamentally doing the same thing. We’re all picking up garbage. We’re all bringing it to facilities. They’re processing materials. But the way they do it, or the nuances around that workflow, are very different, depending on where you are.

And the example I’ll use is like, you know, you have New York City—again, that’s like a very tight space, limited space, lot of people. And then you’ll operate with a company down in Alabama or Mississippi that has a big urban sprawl, and they have different types of issues, different types of problems. And so everybody’s trying to do the best they can from a service perspective. But ultimately, it really is dependent on where you are regionally. And I think that’s where dynamic software and the ability to be dynamic really provides a lot of value overall.

Mitch Ratcliffe  8:04

The old approach to this business was you had a landfill and you had a certain number of years to fill it, and so you were managing filling a hole rather than extracting value from the waste stream. How have you seen that transition change the focus of the business that you’re trying to support with software?

Mike Marmo  8:21

So I think, I mean, maybe I can take a step back into the history a little bit. To your point, I think waste used to be volume-based. It was very much like, I charge a price per yard, I dump for price per yard. And there was a simplicity in that. But I think it also led to—kind of, the way that pricing was done was, again, very volume, and it was very simple.

When the industry moved into weight and it started to weigh materials—and obviously within that, the kind of correlation of commodities being pulled out and the value in the global supply chain—there was a shift in the industry where some of the waste haulers still were pricing or stuck in a volume-based framework, but the facilities were pricing off of tonnage.

And there was an evolution that happened over time. So what you end up seeing is like, if you order a dumpster, for example, and a dumpster has a certain amount of price and allowable tonnage, and then you’re pricing off a matrix format for additional tonnage—the industry shifted. There was a shift in the way that the industry actually started to work.

So now what ends up happening in that framework is, some landfills, you know, big facilities, certain markets have a lot of land and a lot of sprawl, and they have big holes with long lifespans. Whereas other markets don’t have any landfills, or have many landfills closing because they’re running out of space, and they’re moving to intermodal, or they’re moving to, again, like MRFs. There’s been more focus on bringing materials back into the supply chain. So I think we’re still seeing that shift happen. It’s still moving in that direction.

And I think, again, like I always say, waste is a utility that’s not measurable, and I think that’s the main problem. And in order to do this well, you need to have a unit of measurement, a single point of truth. And so that’s why I think software comes into play. It’s able to aggregate a bunch of data—operational data, but also data that’s related to the material and waste streams—and be able to measure what’s going on, and then be able to make better business decisions and better regulatory decisions on the long term.

Mitch Ratcliffe  10:23

CurbPOS tracks inbound and outbound materials at these transfer stations. When a truck dumps a load, what’s the data capture process, and how granular does it get in terms of the materials that you can classify and identify? And then what does that enable in terms of value extraction?

Mike Marmo  10:38

It all depends. It really depends on the market. Some, it hits the floor and then it just gets, you know, taken out to the next place. Other markets will obviously run it across a belt, pull out commodities. So there’s something measurable that’s happening.

I think, you know, the age of technology now, you can do things like material recognition—AI being able to do material recognition and get components of that. Obviously, the certification bodies like RCI and LEED that are helping to kind of audit and make sure that there’s an evaluation period of whatever they’re saying they did, or whatever they’re pulling out of the stream.

But the inbound-outbound correlation is really what matters. Because when you’re coming onto the scale and you’re getting weighed and you’re putting it on the floor, once it hits the belt, we can then take the outbounds and create that mapping of, okay, this material, amount of material came in that day, this load hit the floor, and then this is what was distributed out. And then we can show you what a recycling rate was. I still think there’s more to be done there. I do think that cameras and AI can measure that when it hits the ground, but I think the industry is moving in the right direction overall.

Mitch Ratcliffe  11:52

Let’s step back a little bit from the industry to, let’s say, a five-truck family operation that’s never used anything except maybe QuickBooks to do some invoicing. What is the actual on-ramp to CurbPOS look like for them? How does it change their business?

Mike Marmo  12:09

Yeah, so I think if you’re a hauler, you’re going to be on the CurbWaste product. If you’re transitioning to be on the CurbPOS product—but really, around implementation, I think that’s actually a natural point where people start thinking about software as a hauler. You know, you really want to be cost-efficient in the early days, and so sometimes software might be out of the price range. But I think as you start to grow, and you’re seeing that incremental growth, what most haulers are looking for at that point is efficiency and visibility.

So what software is able to do—operationally, it’s allowing you the ability to be efficient and to be able to see what’s working and what isn’t, and then it’s also giving you insights into what’s measurable, so that you can keep investing in the things that are working. That’s hard in the waste business overall, but it’s a good way to start.

When you go through change management, change is hard all the time. Like, if you have a process that’s working, and it’s, you know, the kind of old adage, “If it ain’t broke, don’t fix it.” You hit a certain point where you have to make a decision about what you want—what is the motivating factor of the business? So are you trying to grow, or are you just trying to maintain where you are? Most people that are entering business and entrepreneurship are trying to grow. So then it becomes about scale. It becomes about, I need to maximize and focus on the most important thing, and I can’t do everything. And eliminating manual tasks allows you to scale more efficiently.

So you go through the buying process and you find the right fit for the software that you need in the moment of which you need it. But you also need to consider what you can scale into as you grow. And then you go through a process of entering orders, getting training, training the drivers, training the staff, making sure everybody understands how the system works. But then there’s a transition period. We stick with them, we make sure that everything is going the way that we hoped it would go, what the project plan said, and you’re supporting them along the way. But at a certain point, the system is running for you, and then they’re off to the races and they continue to scale.

Mitch Ratcliffe  13:53

One of the major changes in the industry that’s driving this transition is the introduction of extended producer responsibility laws, which require, for instance, you’re measuring material type, the weight, its recyclability, and whether it’s recycled, and getting verification of that diversion from landfill. Was that in your head when you started thinking about developing CurbWaste, or is this an opportunity that’s just sort of emerged conveniently at the same time?

Mike Marmo  14:20

100%. When we got into this, the grander vision was the interconnectivity of the supply chain from a data perspective. So the way I kind of like to normalize it is, you have a generator, you have a collector—a hauler—you have a disposal site, and then ultimately end use, right? But it’s end of life. So does it go back into the supply chain through the circular economy? Does it end up in the hole? Whatever that is. There’s usually that period of time where the life cycle has ended.

So the way we thought about it was, well, where can we focus energy from a software perspective? I view the haulers and the transfer stations and the disposal centers as the core of the data set. So we really want to be hyper-focused on aggregating data and providing value in those areas. But ultimately, the idea was to interconnect the generation piece to the rest of it. So when we started, we really stayed focused on that part—the collector and the disposal. But now we’re starting to migrate into the generator piece, to really connect the data sets. And to your point, show where material is being generated, how it’s being generated, where it’s going, and ultimately where it ends up. That’s the measurement of the utility. That’s the waste meter. And that’s what we’re trying to achieve.

Mitch Ratcliffe  15:31

We’ve had a number of sorting and hauling folks on the show, as well as a lot of other thinkers on this topic of the circular economy. So building on this reality in which you’ve got verification that materials have been moved to a particular place and at a particular pace, do you imagine it’s possible to actually plan regional material flows, to really turn the circular economy on in its full flower?

Mike Marmo  15:55

Yes, I do. It’s a lofty goal. A lot has to happen. But I do believe that that’s possible. And the analogy I like to use is something like Amazon. Amazon was able to understand from a retail component, like, what buyer behavior was. They were able to leverage data around buyer behavior, and then they were able to integrate themselves into the supply chain—the freight forwarding, the warehousing, the ultimately last-mile delivery.

And they do it so well. The reason why you’re able to get something in the same day is because they were able to connect all those pieces and understand the output. I believe that the waste industry can achieve that. And so that was a core part of what we are trying to do. You have to walk before you run. You can’t do everything all at once. And again, this is a business, right? Like, if I sign up a hauler and I can’t run their business, then the workflows—you have to build a foundation before you build the house. But I think the long-term vision is the ability to do exactly what you just said.

Mitch Ratcliffe  17:03

Millions of people come to Earth911’s database to find out what to do with specific materials, and one of the things they’re interested in is getting the right material to the right place, so that it is actually recycled. And what you just described in the context of Amazon, for instance—should we not be thinking about putting everything in a single bin? But could we, in an economically viable way, actually have specialized collection that would produce a cleaner load?

Mike Marmo  17:33

Yeah. I mean, one of the things that I saw as a waste hauler that I struggled with was, we’re making decisions—whether regulatory or whether it’s, you know, just in general—like, if you’re trying to be a good actor and try to do the right things, but it’s not rooted in much data. And so what I tried to say was, well, if we can’t measure it, then how do you action it?

And I think the first step, the first thing that everybody should be paying attention to is, how do we measure this? Like, what are we actually looking at? What is the scope of the effort? I don’t think anybody could tell you that, but I think there are ways to do it. And I think, as you have—we like to refer to ourselves as a system of action. You have to have a single point of truth. And when you have a single point of truth, you can then make action against it. So data is the most important thing right now. Data aggregation is the most important thing.

To your point, you did say something that’s really important that I think gets missed as well, which is, it has to be economically viable. There has to be ROI associated. And so a lot of times, what ends up happening is you get a compliance or regulatory effort that doesn’t really take into account the business criteria, and then people are resistant to it, because the business still has to run—it’s a for-profit entity. We want to take the opposite approach. We want to provide value and find ROI in the haulers’ work. Work alongside them, work alongside the transfer stations, work alongside the landfills. Understand how they’re thinking about their business, and really get down into the KPIs of their ROI, and then funnel that back up to the generators and say, here’s how they make money, here’s what’s valuable to them. How can we work together to make that make sense?

I think there’s a way to do that, and it’s just about visibility. It’s transparency, it’s visibility, it’s getting people on the same page. And working together is really what we need to do.

Mitch Ratcliffe  19:05

So here’s a hypothetical. Let’s say you look to the one organization in the world right now that has the greatest visibility into what’s flowing into homes, and that’s Amazon, like we were just talking about. Could you partner with Amazon to say, we know you’re delivering this much cardboard, this much plastic waste, and so forth into this region, and then plan a hauling solution in response to that?

Mike Marmo  19:29

That’s right. That’s the end goal. That’s probably the last step, the last piece of the puzzle. But that’s exactly what you want to do. You know, waste is being created when it’s being manufactured, right? Like, ultimately, when it starts, at that point is when we know what the waste stream is going to look like. But again, if you have nowhere for it to funnel in, and you have nowhere to measure it, it’s disjointed. You have to have an integratable solution to be able to even do that. So yes, that is the goal. But ultimately, we have to start at the foundational level.

Mitch Ratcliffe  19:58

Yeah. We’re moving to a more planful economy, and there’s a lot to unpack in that idea. Let’s take a quick commercial break. We’re gonna come back to this fascinating conversation. Folks, stay tuned.

[COMMERCIAL BREAK]

Welcome back to Sustainability In Your Ear. Let’s return to my discussion with CurbWaste CEO Mike Marmo. He’s a fourth-generation waste industry veteran whose AI-augmented CurbPOS system automates recycling operations. So, Mike, until recently, the waste management industry has been resistant to digitization. Let’s just put it that way. And there’s a massive change ahead. What do you see in terms of a new generation of leadership and the way they think emerging as this industry grows?

Mike Marmo  20:43

Yeah, I think tech adoption in general runs through cycles, right? You have your early adopters, people that see the value. Usually, that’s someone that understands that they have to differentiate. That’s helping at the market. I was at that at one point—when you’re competing with 200 haulers in New York, you have to figure out a way, right? So tech, for me, was the way that I differentiated myself.

So you start with those, and what you’re really doing is you’re proving the ROI, you’re proving the case. You’re building case studies around, okay, this is providing value in this particular area, but you’re also identifying the meaningful pain points of what they’re experiencing. I think a lot of times, if you talk to a waste hauler, maybe generally they’ll say, like, things are working. But if you really get down into it, pull back the layers, there’s always a pain point. There’s always something they’re trying to solve for.

But when you see margin shrinking, you have to either try to drive net new revenue, or you have to be able to save in a certain area. So then what ends up happening naturally is that people start paying attention and they say, okay, this person is growing. They’re growing 30% year over year. What’s driving that growth? And eventually you get adoption. In that way, you get that mass adoption. But some people don’t want to take the risk. They want the other people to take it first and have that proof point. But then it kind of accelerates, and that’s when you start to get into that hyper-growth, hyper-adoption phase.

I think we are very, very close to that. I think what’s happening is people are paying attention to what’s going on. From a tech perspective, it is moving at hyper speed at this point, and so the world is evolving at such an incredibly fast rate that anybody that doesn’t adopt will ultimately fall behind at some point. So I think the waste industry historically has been a little behind, but I don’t anticipate that being the case for the long term.

Mitch Ratcliffe  22:23

When you raised your Series B, you said that you wanted patient capital that understands that this industry won’t transform overnight. And in the context of what you just said about everything changing at hyper speed, why patient? And how does that transformation happen in practice? And what do you see as the timeline?

Mike Marmo  22:41

It’s pretty simple. I think I alluded to this earlier. You have to build the foundation before you build the house. You can’t build the roof first, right? You have to build the foundation. And a lot of waste haulers—you have a varying degree of waste haulers around the country that are like two-to-three-truck operations all the way up to 30,000-truck fleets, right? So you have to meet them where they are. If you cannot run the business for them in a meaningful and impactful way, then you’ve already failed. There’s nothing that you can do that will really help them unless you pick a niche part of their business. And we have a lofty goal of being an operational management system. We want to be able to run the entire business on the platform.

So you have to start there. And when I say patient capital, there’s a lot of effort that goes into building those workflows, not just surface level, but adding depth, adding nuance and depth, to make sure the system is dynamic but rigid. You don’t want data to be wrong, and you don’t want it to get convoluted, but you want it to be dynamic enough to meet the need in the market. So that takes time. You have to learn. You have to listen. You have to pay attention to what’s going on. You have to be a really, really good partner to the waste hauler. They have to trust you and believe in you.

So that part of it is like the first step into the rest. But in conjunction with that, you have to be forward looking. You have to be looking at the things that they’re not paying attention to, the things that they don’t know, because they’re in the weeds dealing with the day-to-day. They’re dealing with servicing their customers, they’re dealing with the community, they’re dealing with building the business that they’re focused on. So it’s our job as a tech partner to be able to say, this is where the industry is moving, here’s what this is going to lead to, here’s the vision, and hopefully get people to sign up to that and believe in that.

So when we brought in a partner, we articulated that. I think a lot of times, when you bring on venture capital or any funding, they’re expecting this major hyper growth. But if you want to achieve what we’ve been speaking about thus far, you need to get things right, and you need to make sure that you’re building the foundation correctly.

Mitch Ratcliffe  24:40

You’re leaning into AI. Does that mean that you’re training models to become an expert in managing waste or hauler processes? Where’s the focus of your training?

Mike Marmo  24:51

It’s really in a couple different areas. I think what we really preach out there in the market is, AI for the sake of AI means nothing. Like, AI is cool. It’s great. It can provide you really meaningful value in certain areas of your life. And I think it’s going to be transformative, without a doubt. But in our industry, waste haulers don’t really care about necessarily putting something in because it’s flashy and nice and cool. They want it to provide value.

And so when we think about AI, we think about manual tasks. We think about repeatable tasks. We think about infinite-scale areas of their business that we’re solving an immediate pain point, or that they can scale with for the remainder of time, because that thing is going to happen all the time. So an example of that would be, how are we ingesting orders from multiple channels to create efficiencies? How are we setting up call centers? How are we transcribing phone calls for customer support and customer success?

And then I think what you’re referring to on the learning side is the gluing of traditional machine learning and algorithmic types of optimizations—for example, like route optimization—gluing it to historical behavior and being able to say, here’s the nuances, here’s when the person never puts their garbage out on time, here’s where this street is closed, but it doesn’t show you that in the map. Just certain things that dispatchers know, that tribal knowledge, that they understand their market, that an algorithm is not going to understand. And that’s where AI can layer in and learn behavior and then make better recommendations.

So it’s not an overnight thing. You have to have the data. It’s only as good as the data. So we’re really focused on the infrastructure architecture, making sure that we’re aggregating that data appropriately, and then learning on that data in order to make sure that we’re giving them the best option for success, or the best decision-making process, or the most optimal insight that we can provide.

Mitch Ratcliffe  26:42

So what’s an example of an AI-driven recommendation that one of your haulers has used to make a decision that they wouldn’t have otherwise?

Mike Marmo  26:50

Yeah, I think, like, operationally, or just anything that we can do that’s kind of AI-powered—

Mitch Ratcliffe  26:56

One that was a material difference for the hauler. What do you point to as an example when you’re talking to other haulers?

Mike Marmo  27:04

Yeah, let’s—I’ll probably say two. I think first, let’s just talk about—we’ve talked about change management. I think right now, internally, we’re really hyper-focused on making sure that we can create a really nice change management experience of adopting software. So we do a ton around AI data migrations, so that when we’re taking data out of a system, we’re able to map it in a quick and easy way that they can understand it, but also do structured cleanups of that data to make sure that they’re getting what they want into the new system. It seems like a small thing, but it’s a very challenging thing when you’re going through a long change management process. So that’s an immediate impact to the hauler, that they feel more comfortable in that change.

The second thing is, anything agentic that we build is going to provide value to the pain point that they’re trying to solve for. So whether that’s migrating data from one place into another—being able to take data out of a CRM or being able to put it into an ERP—meaningful value. You’ve just eliminated a manual task that they would have to do over and over and over again. That’s repetitive, that’s manual, and it applies. So it’s a really good method in providing ROI, because you can just say, that work is never going to be done again. That agent will work in that and do that for you with conviction.

But I think longer term, things like we talked about—service verification, material recognition, route optimization—those are efforts that we have to make meaningful investments in, that’ll be coming down the pike.

Mitch Ratcliffe  28:29

You know, as I listen to your description of this, and I think about the U.S. recycling system, which is, as you’ve pointed out, filled with small, private recyclers and haulers looking for ways to plug into, for instance, the growing extended producer responsibility infrastructure that’s emerging around us—I’m reminded of eBay. Is CurbWaste aiming to become a marketplace layer where those independent operators can begin to identify and plug into broader materials flows?

Mike Marmo  29:00

It’s on our radar. Like I said, I think a marketplace, to me, again, is really indicative of the behavior and the learning and understanding what’s going on. So right now, core focus is just visibility. I think we have to create the transparency layer first before anything else.

But yes, I would say, a marketplace, the ability to understand who’s best—like, RCI is a great example. I mean, RCI, when you’re partnering with LEED and you’re trying to find RCI facilities to establish those LEED points, that’s an area where we can help and say, this facility is in this area. Partner. We’re driving revenue for our customer base. We’re saying this RCI facility is on our platform. We can measure it. We can automate that process. We can get that LEED report to the right person in the right moment and give that level of visibility through dashboards or anything that we’re building at a customer-facing level.

Again, that’s work that doesn’t have to be done manually. That’s something that can happen in automation. That’s probably the first natural step. And we are doing some meaningful work with RCI and LEED. But long term, I think, yes, to your point, we want to get to a visibility layer, a waste meter layer, for anybody that wants it.

Mitch Ratcliffe  30:10

That transparency that you’re describing is going to be particularly important to producer responsibility organizations, the entities that are standing up to fulfill EPR requirements. Are you talking with them about how you can facilitate the management of their specific materials?

Mike Marmo  30:28

Yes, we are very much in discovery and in conversation with people that are obviously interested and incentivized to want to work with us and try to achieve this vision. So we do talk to people, and we do try to understand, what visibility do they want? What would they love to see? What is a utopian point of view? I mean, product is always something that we’re always forward looking on, right? What’s being built today is actionable. It’s already been validated. Now it’s about, what are we going to build in the future? We’re probably talking a few years down the road. I think we still have a lot to do on the workflow side. But yes, we are always keeping these teams informed and making sure that they’re aligned with where we’re going.

Mitch Ratcliffe  31:06

You’ve raised $50 million to date. Do you see a substantial amount of capital sitting out there waiting for this efflorescence of data visibility to take hold, so that they can begin to mine the material value in the economy?

Mike Marmo  31:21

Yes. I mean, our Series B was led by the venture arm of Cox Enterprises, and it was a very big part of their thesis. They saw the vision. They aligned with it. We were able to move quickly. But it really was rooted in the fact that they’ve been seeking this type of solution internally. They’ve been trying to figure out how to get more visibility into their own efforts as it relates to sustainability. So yes, I think we will continue to build. We have to fund the business in order to build the products and achieve the dream that we want to. We do believe that this can be a very big business, but ultimately, we are still aligning on that mission statement and that vision of giving the true visibility and measurement of the waste industry.

Mitch Ratcliffe  32:00

We’ve been looking kind of over the horizon without a clear timeframe. But let me ask you this: in 10 years, will we have an AI-enabled circular economy running, or will it still be in the process of being constructed?

Mike Marmo  32:12

I think it will be there. Yeah, in 10 years, I think it will be there. I think, you know what I know internally of where we are—we are not that far off. We have spent the last four years on the workflows. We are starting to see the data benefit of that. I think in the next 10 years we will 100% have it.

Mitch Ratcliffe  32:33

So how does that change the economy of the United States?

Mike Marmo  32:37

You know, that’s the part that I’m not 100% sure. I’ve been operating under the mission statement of this dream and this vision. I do think that it’s going to ultimately make us rethink how we think about waste.

You know, you have electricity, right? You can measure it. You can go onto your portal and see how much you’re consuming. You can measure water. You can measure all the things that you’re using on a day-to-day basis. The waste industry is a part, a core part, of our infrastructure. It’s a core part of our society. You can even look historically and say, when waste stops getting picked up, it can crumble a society. It can crumble a city. I mean, New York City went through that in the strike, and recently in Boston they went through it.

So there’s meaningful implications to the societal impact that waste has. And sometimes I think that gets taken for granted. And I think what we really want to focus on is showing that—getting all the waste haulers in our community, which I really think we’re building, is a really great community of waste haulers that are forward thinking, that want to be a part of that mission, and try to show people how critical this industry is, and also all the things and all the information and insights that can come out of it.

So yeah, it’s very mission-driven. It’s a very personal journey. It’s a very mission-driven journey. But ultimately, I think we have to break it down into its parts, phase out what the goals are, and then get to a point where we can show people how important it actually is.

Mitch Ratcliffe  34:05

This is a huge vision. How can our listeners keep track of your part of the story?

Mike Marmo  34:10

Well, I mean, obviously we post whatever we have to post on our website, so that’s a good place—at curbwaste.com—but also, anybody can reach out to us. I mean, we are very much trying to be an advocate of the industry, and we’re very much trying to be people that can be thought leaders and really speak about what we’re trying to achieve here. We’re very transparent, we’re very honest, we’re very true to who we are. So we love interacting with people in the space. We have people come to our office often. We have people talk to our team often. So for me, it’s reach out. Reach out on LinkedIn, reach out on the website. You can reach out by any means necessary.

Mitch Ratcliffe  34:48

Mike, thanks very much. It’s been a really interesting conversation.

Mike Marmo  34:52

Thank you. I really appreciate you having me.

[COMMERCIAL BREAK]

Mitch Ratcliffe  35:08

Welcome back to Sustainability In Your Ear. You’ve been listening to my conversation with Mike Marmo. He’s CEO and founder of CurbWaste, and a fourth-generation waste industry professional who’s building the CurbPOS system, an end-to-end operating system for independent waste haulers. You can learn more about the company and its work at curbwaste.com—CurbWaste is all one word, no space, no dash.

Mike said something during the conversation that I encourage you to sit with: waste is being created when it is being manufactured. Now, that’s a deceptively simple observation, and it reframes everything with regard to how we think about the leftovers of the take-make-waste economy. The moment a product rolls off the line, its waste stream is determined—its packaging, what you need to do with it, the end-of-use disposition of the product itself, and the materials that will need to be collected, sorted, and either returned to the supply chain or, unfortunately, sometimes buried in a hole. If you can accept that premise, then the waste management industry isn’t simply a downstream result of the current economy. It’s a mirror that we need to look into to see the potential value to be recovered next week, next month, next year, or decades from now, when materials can no longer serve their current purpose.

Mike also pointed to what happens when waste stops moving. In 1968, New York’s sanitation workers walked off the job for nine days—just nine days—and 100,000 tons of garbage piled up chest-high on sidewalks. Rats swarmed into the city’s best neighborhoods, and New York declared its first public health emergency since the 1931 polio epidemic. And just last summer, when Teamsters struck against Republic Services in the greater Boston area, trash went uncollected for more than two months across 14 communities. Dumpsters overflowed behind restaurants. The rodent population exploded, and schools faced the start of their school year buried by rotting waste. As Mike put it, when waste stops getting picked up, a society can crumble.

And that fragility reveals something profound about society’s relationship with the materials from which it is constructed. We’ve built a civilization on the assumption that waste must disappear—that it’s someone else’s problem, and that it is best put out of sight and kept out of mind. We’ve treated waste as dirty, shameful, and beneath notice. That cultural contempt has real economic consequences, because it means we’ve systematically underinvested in the infrastructure that manages the material afterlife of everything that we produce and consume.

Now just imagine what happens when waste is no longer something to dispose of, but something that it’s important to recover. When the 290 million tons of municipal solid waste moving through U.S. systems each year is finally understood not as a cost center, but as part of the supply chain—a feedstock stream worth tracking, optimizing, and monetizing with the same sophistication we bring to any other logistics challenge. That’s when the world CurbWaste wants to enable and its staggering economics will come into being.

Accenture research projected that the circular economy could generate $4.5 trillion in additional economic output by 2030 and as much as $25 trillion by 2050. The United Nations Development Program has endorsed that same $4.5 trillion figure, noting that the transition would simultaneously cut emissions, create stable jobs, and open new green markets all over the world. Market analysts are converging on figures that describe an enormous circular economy. King’s Research projects it will reach nearly $2.9 trillion by 2031, while a more conservative estimate from Next Move Strategy Consulting pinpoints $1.3 trillion in projected value by 2030—so that even the lowest projections represent a doubling or tripling of the current waste market’s value in just five years.

The point is that we’re dramatically underinvesting relative to the opportunity. CurbWaste’s CurbPOS is just getting started on the path to connecting waste generators to local haulers, closing the loop that Mike described, from the point a product is manufactured to the end of its life and, ideally, back into the supply chain.

Mike’s Amazon analogy is the right way to frame this. Amazon took the time to understand buyer behavior first, when they were just selling books, and then they connected warehousing, freight forwarding, and last-mile logistics based on the knowledge of the consumer’s needs. The waste industry can follow the same logic: identify what’s being generated, where it flows, and where it ends up, ready for collection. Then the challenge is plugging the myriad gaps in our collection infrastructure by connecting independent operators—new startups—to materials that they can monetize, using a shared digital infrastructure. Right there you can see the necessary transparency layer, the marketplace layer, that turns a fragmented collection system into the connective tissue for a circular supply chain.

And that’s the signal that can transform waste into value, and that will drive new revenue for state and local collection and processing companies under extended producer responsibility programs, and ultimately lead to planned regional materials flows that citizens don’t pay for, that companies exploit because it’s profitable.

So when waste stops being considered the dirty result of our consumption and starts being recognized as valuable—when society looks at what it throws away with the same interest it brings to what it buys—we will have a fundamentally different relationship with the material world. One that recognizes that the people who move and manage our waste are operating a utility as essential as electricity or water. And that’s the story that will help unfold and explore here on Sustainability In Your Ear.

So stay tuned. And folks, would you take a moment to check out our archive of more than 540 episodes of Sustainability In Your Ear? We’re in our sixth season, and I guarantee you there’s an interview that you’ll want to share with one of your friends. Writing a review on your favorite podcast platform will help your neighbors find us. Folks, you’re the amplifiers that can spread more ideas to create less waste. So please tell your friends, your family, and co-workers. They can find Sustainability In Your Ear on Apple Podcasts, Spotify, iHeartRadio, Audible, or whatever purveyor of podcast goodness they prefer.

Thank you for your support. I’m Mitch Ratcliffe. This is Sustainability In Your Ear, and we will be back with another innovator interview soon. In the meantime, folks, take care of yourself, take care of one another, and let’s all take care of this beautiful planet of ours. Have a green day.

The post Sustainability In Your Ear: CurbWaste’s Mike Marmo Is Building the Waste Logistics Layer of the Circular Economy appeared first on Earth911.

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Green Living

Earth911 Inspiration: What Provides Survives — Simon M. Lamb

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Today’s quote is from writer, businessman, and conservationist Simon M. Lamb. In his book, Junglenomics: Nature’s Solutions to the World Environment Crisis, he suggests that nature provides solutions to help us reform our environmentally destructive economic practices.

Lamb writes, “As in nature, so in economics — what provides survives.”

Earth911 inspirations. Post them, share your desire to help people think of the planet first, every day. Click the poster to get a larger image.

"As in nature, so in economics -- what provides, survives." --Simon M. Lamb

Editor’s Note: This poster was originally published on March 27, 2020.

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Green Living

Stop the Summer Reading Slide With Eco-Themed Kids’ Books

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Summer is a time for playing outside and enjoying the environment. At least one study has shown that playing outside as a child is an important predictor of protecting the environment as an adult. But parents need to ensure kids keep up their reading skills, which often slide over the summer.

These books with environmental themes, sorted by reading level, will improve both your kids’ literacy and their environmental awareness. We suggest reading them in a treehouse or on a picnic blanket in the sun.

Earth911 teams up with affiliate marketing partners to help fund our Recycling Directory. If you purchase an item through one of the affiliate links in this post, we will receive a small commission.

Picture Books

A Leaf Can Be …

by Laura Purdie Salas

A leaf can be a … shade spiller, mouth filler, tree topper, rain stopper. Find out about the many roles leaves play in this poetic exploration of leaves throughout the year. Pair it with the companion volumes A Rock Can Be … and Water Can Be … for a full nature-cycle set.

The Tantrum That Saved the World

by Megan Herbert and Michael E. Mann

A little girl inherits a huge problem she didn’t ask for — and then channels strong emotions into positive action. Co-written by climate scientist Michael E. Mann, the second half explains the science of climate change in age-appropriate language and closes with a kid-friendly action plan.

Seeds of Change: Wangari’s Gift to the World

by Jen Cullerton Johnson

It’s never too early for children to see examples of strong women who make the world a better place. This picture-book biography of Nobel Peace Prize winner Wangari Maathai illustrates the often-overlooked intersection between ecology and justice, which makes this example even better.

We Are Water Protectors

by Carole Lindstrom, illustrated by Michaela Goade

New to this list. Winner of the 2021 Caldecott Medal, the first awarded to a Native American illustrator, this lyrical, gorgeously painted book follows an Ojibwe girl who rallies her community to defend the water against a “black snake” pipeline. It introduces the youngest readers to Indigenous environmental stewardship and the idea that water is life.

Books for Younger Middle Grade

The Magic School Bus and the Climate Challenge

by Joanna Cole

Trust the beloved kids’ science series Magic School Bus to explain the facts of global warming in ways kids understand, and to give them ideas about how they can help. Ms. Frizzle takes the class from the Arctic to the equator to see the signs of a warming planet firsthand.

The Last Bear

by Hannah Gold

New to this list. There are no polar bears left on Bear Island, or so April’s father tells her when his research takes them to a remote Arctic outpost. Then April spots one: hungry, lonely, and far from home. Hannah Gold’s award-winning debut (a Waterstones Children’s Book Prize and Blue Peter Book Award winner) pairs a tender friendship story with a clear-eyed look at melting sea ice, illustrated throughout by Levi Pinfold.

Operation Redwood

by S. Terrell French

The environmental movement is too often associated with white people. In Operation Redwood, a biracial boy challenges his rich relatives to look past the profit motive and protect an old-growth redwood grove on property they own.

Books for Middle-Grade Tweens

Two Degrees

by Alan Gratz

New to this list. From the #1 New York Times bestselling author of Refugee, this fast-moving novel braids together three kids facing three climate disasters — a California wildfire, stranded polar bears in Manitoba, and a Florida hurricane — into one connected story. It won the 2023 Green Earth Young Adult Book Award and reads like a thriller, which makes it a strong pick for reluctant readers.

Gorilla Dawn

by Gill Lewis

Two children living in the Congo’s war zone risk everything to protect a captured baby gorilla from a life in captivity. Although not graphic, this book is intense. It addresses the impact of violence on children and wildlife and reveals the connection between the rare-earth minerals in consumer electronics and devastating destruction in Africa.

Squirm

by Carl Hiaasen

While not as overtly environmentalist as the well-known Hoot, Hiaasen’s eco-adventure features tween protagonists who care about animals and appreciate the natural world more than the adults around them — here, a Florida kid who heads to Montana to find his father and ends up tangling with poachers, a spy drone, and a grizzly. His characteristic irreverent humor is on full display.

The Last Wild

by Piers Torday

A boy who can talk to animals — but not people — fights against extinction in a world where a virus has wiped out nearly all wildlife. The first book in a gripping trilogy, it’s a natural conversation-starter about biodiversity loss and what a landscape looks like once the wild things are gone.

The Casket of Time

by Andri Snær Magnason

From poetry to nonfiction, books by Icelandic author Andri Snær Magnason are unified by environmental concern. Now available in English, his 2013 novel for tweens and teens, The Casket of Time, tells the story of Sigrun, a teenager whose TimeBox® opens too early. Her family entered the TimeBoxes to sleep out “the situation,” but now she finds herself among the few who are left awake to fix the world. Younger readers will enjoy his first children’s book, The Story of the Blue Planet.

Make the Most of Summer Reading

A few simple habits help these books do double duty — building reading stamina and environmental awareness at the same time:

  1. Read outside. Pairing a nature story with time in a backyard, park, or trail reinforces the connection the research points to between outdoor play and lifelong environmental care.
  2. Borrow before you buy. Most of these titles are available through your local library or its e-book app, which keeps reading low-cost and low-waste. Buy the keepers your kids want to read again.
  3. Talk about the action steps. Several of these books — The Tantrum That Saved the World, Two Degrees, Old Enough-style activist stories — end with concrete things kids can do. Pick one and try it together.
  4. Pass them on. When your family outgrows a book, donate it to a school, Little Free Library, or shelter so it keeps circulating instead of heading to the recycling bin.

Editor’s Note: This article was originally published by Gemma Alexander on May 10, 2019, and was most recently updated with new titles in June 2026.

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Green Living

How Clean Is Your Toothpaste?

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In 2025, independent lab testing found that roughly 90% of the toothpastes it examined contained detectable lead. The brands implicated were not fringe products, including household names like Crest, Colgate, Sensodyne, and Tom’s of Maine, along with dozens of formulas marketed for children and many sold as “natural” or “green.”

That headline rattled a lot of medicine cabinets, and it deserves a careful look rather than a panic. Toothpaste is, after all, a cleaner we put in our mouths twice a day for a lifetime. Knowing what’s in it, what the science says about the risk, and which ingredients raise legitimate environmental and health questions is worth a few minutes. Here’s where the evidence stands now.

Toothpaste, a History

The history of oral hygiene dates back nearly 7,000 years to an abrasive powder made from materials like eggshells, pumice stone, or ox hoof ashes. Egyptians would wet the powder and rub it on their teeth. Later the Romans and Chinese sought to improve the flavor of their abrasive powders with herbal ingredients like mint and ginseng. Not much changed until the 1800s, when inventors added soap and chalk to the powder.

The first toothpaste tube, which was made of lead, was introduced in the 1890s. (Yes, lead has a long and unfortunate history with this product.) It was the first of many changes that followed in the 20th century, as a host of new chemicals both increased the effectiveness and the environmental and health risks of toothpaste. In 1955, Procter and Gamble released the first stannous fluoride cavity-preventing toothpaste. Fluoride remains the most common active ingredient in toothpaste today.

Personal care products of all kinds were largely homemade until the last century, and that is still an option today. You can make your own toothpaste and mouthwash at home using simple ingredients you already have in your kitchen. Talk to your dentist before giving up fluoride, though, which is proven to deter cavities.

toothpaste on toothbrush on sink
Are there troublesome ingredients in your favorite brand of toothpaste?

The Heavy Metals Question

The 2025 lead findings came from Lead Safe Mama, a consumer-advocacy operation run by lead-poisoning-prevention activist Tamara Rubin. Its program crowdfunds samples and sends them to an independent, third-party lab. Across roughly 51 toothpastes and a few tooth powders, about 90% tested positive for lead, 65% for arsenic, just under half for mercury, and about a third for cadmium. All four are toxic; lead and arsenic are particularly concerning for children’s developing brains.

That sounds alarming, and the contamination is real. But context matters enormously here.

Where the metals come from

The contamination appears to be unintentional, traced to naturally sourced ingredients that carry trace metals when they aren’t purified: hydroxyapatite (often derived from animal bone or mineral sources), calcium carbonate (an abrasive), and especially bentonite clay, a natural “detoxifying” ingredient that was a recurring culprit in the highest-contamination products.

Rubin’s ingredient testing found the raw materials themselves were contaminated, which points to a supply-chain and sourcing problem rather than one or more bad actors.

The regulatory gap

None of the tested products exceeded the FDA’s federal limit for lead in toothpaste, which is 10,000 parts per billion (ppb) for fluoride-free pastes and 20,000 ppb for fluoride pastes. However, those thresholds are substantially higher than the limits set for food. By comparison, California caps lead in baby food at 6 ppb, and the proposed federal Baby Food Safety Act would set 10 ppb, neither of which covers toothpaste. Most tested pastes cleared the baby-food bar by a wide margin but sit far below the cosmetic ceiling.

Washington State has moved to close part of that gap. Its Toxic-Free Cosmetics Act set a 1,000 ppb lead limit for cosmetics, including toothpaste. A handful of products in the testing exceeded it, with the worst offender, a brand called Primal, containing 7,800 ppb. Companies have been given time to come into compliance.

What an independent risk assessment found

After the headlines, toxicologists reviewed the Lead Safe Mama results. A peer-reviewed screening-level risk assessment published in Public Health Toxicology in 2025 used Lead Safe Mama’s own data and deliberately conservative assumptions, including the worst-case scenario that a child swallows a full smear of toothpaste at every brushing. The conclusion: for cadmium and mercury, exposures fell below health-guidance values across the board. For lead and arsenic, on the other hand, a handful of products exceeded the most protective guidance levels under heavy-use scenarios, but the doses were still several times to several orders of magnitude lower than what children and adults already get from food, household dust, and soil.

The researchers’ assessment concluded that the heavy metals detected “are not anticipated to increase health risk” through typical use, and that a normal pea-sized amount is safe. That doesn’t make the contamination acceptable; no level of lead exposure is considered safe, and unnecessary exposure is still worth avoiding. But it reframes the story from “your toothpaste is poisoning you” to “your toothpaste is one more avoidable trace source in a world that has too many.”

A small set of products came back as free of all four metals, proving cleaner sourcing is achievable. They included Dr. Brown’s Baby Toothpaste, Spry Kids’ tooth gel, Orajel Training Toothpaste, and Miessence. (Earth911 will receive a small fee if you make a purchase through these links.) As of mid-2025, Lead Safe Mama listed seven products meeting its non-detect threshold.

Other Ingredients Worth Watching

Heavy metals aren’t the only thing in the tube that draws scrutiny. A few others come up repeatedly:

  • Titanium dioxide. This white pigment (listed as CI 77891) does nothing for your teeth; it’s purely cosmetic, there to make the paste look bright white. The EU banned it as a food additive in 2022 over genotoxicity concerns, and the EU’s Scientific Committee on Consumer Safety has said a mutagenic effect from oral cosmetic use can’t be ruled out. It remains legal in toothpaste in both the EU and the US, and the FDA still permits it, but many manufacturers are dropping it voluntarily. Since it has no functional benefit, it’s an easy one to skip.
  • Sulfates (SLS). Sodium lauryl sulfate, the foaming agent, is not linked to cancer despite a persistent internet rumor. It can be a skin and tissue irritant for sensitive people and has been associated with canker sores. SLS-free options are widely available if you’re prone to either.
  • The sodium pyrophosphate used to prevent tartar can pass through wastewater treatment and feed algal blooms and create dead zones in waterways. Phosphates aren’t in every paste, and some mainstream brands offer phosphate-free formulas.

The Fluoride Debate Got Louder

Fluoride remains the most studied and most effective cavity-preventing ingredient in toothpaste, and major dental and pediatric organizations continue to recommend it. But the politics around it shifted sharply in 2025.

In May 2025, the FDA began action to pull ingestible fluoride supplements (drops and tablets that are swallowed) for children off the market, citing concerns about the gut microbiome and finalizing the move that October. It’s important to read what that action covers: the FDA explicitly distinguished swallowed supplements from topical fluoride in toothpaste and rinses, which you spit out and which it did not move against. The American Academy of Pediatrics and American Dental Association both pushed back hard, warning the broader anti-fluoride momentum could drive up tooth decay.

The underlying science is genuinely unsettled at the edges. A 2025 JAMA Pediatrics meta-analysis found an inverse association between fluoride exposure and children’s IQ, but mostly at exposure levels well above US water-fluoridation concentrations, with the dose-response uncertain at lower levels. The takeaway for toothpaste users is narrow: spitting out a topical fluoride paste is a different exposure than swallowing a concentrated supplement, and the evidence against topical use remains thin. If your water is already fluoridated and you’d rather avoid it, that’s a reasonable personal choice, and there’s now a better-supported alternative than there used to be.

Hydroxyapatite: The Fluoride Alternative That’s Earning Its Claims

Nano-hydroxyapatite is a synthetic version of the mineral that makes up tooth enamel, and has moved from niche fluoride alternative to credible option. A 2024 systematic review and meta-analysis in the Journal of Dentistry concluded that hydroxyapatite toothpaste can be an effective alternative to fluoride for preventing caries progression and remineralizing early lesions, with the added pitch of strong biocompatibility. A 2025 narrative review of recent clinical trials reached a similar conclusion, calling it a safe and effective option, especially for children or anyone at risk of fluoride overexposure, with possible added benefits for tooth sensitivity.

While the data is piling up fast, research on hydroxyapatite is earlier and thinner than fluoride’s decades of data, and some trials are industry-funded. Second — and this is the irony — hydroxyapatite is one of the ingredients flagged as a potential heavy-metals vector when it’s not well purified. The lesson isn’t to avoid it; it’s to favor brands that publish third-party purity testing.

Animal Welfare

It may surprise you that some toothpastes contain animal products. Propolis is sourced from bees. Unless specified otherwise, calcium phosphate and glycerin can be derived from animal bone and fat. If you’d rather not brush with animal byproducts, look for vegan-certified products.

Even toothpastes without animal ingredients may have been tested on animals. To avoid those, look for Leaping Bunny certified products. Vegan and cruelty-free aren’t the same thing, so a product can carry one certification without the other.

Packaging

Toothbrushes and toothpaste tubes can be recycled, but it’s not as simple as tossing them in the curbside bin. Most tubes are multi-layer plastic that local programs can’t process. That’s slowly changing: Tom’s of Maine, Colgate (though Bloomberg found the company’s recyclability claims aren’t well supported), and other brands are transitioning to recyclable plastic tubes.

Tube-free products sidestep the packaging problem entirely. Toothpaste tablets and chewables come in glass or metal-tin packaging, tooth powders ship in tins or jars, and some brands now use aluminum pods.

Sorting the Concerns by How Much They Matter

Not every flagged ingredient carries the same weight. Here’s a plain-language triage based on current evidence:

 
Concern What the evidence says What to do
Heavy metals (lead, arsenic) Real but small relative to diet and dust; below federal limits, above some state and baby-food limits. No safe level of lead exists. Use a pea-sized amount; favor brands publishing purity testing; supervise kids’ brushing.
Titanium dioxide Cosmetic only, no dental benefit; EU genotoxicity concerns; still legal in toothpaste. Easy to skip — it does nothing for your teeth. Check the label for CI 77891.
Phosphates Mainly an environmental concern (algal blooms), not a personal-health one. Choose phosphate-free if available; not in every brand.
SLS (sulfates) Not carcinogenic; can irritate sensitive tissue and trigger canker sores. Go SLS-free only if you get canker sores or have sensitivity.
Fluoride Topical use (spit out) remains well supported; concerns center on swallowed supplements at high doses. Keep using it, or switch to clinically supported hydroxyapatite if you prefer fluoride-free.

What You Can Do

You don’t need to throw out your toothpaste. A few practical moves address the real concerns without overcorrecting for the overblown ones:

  • Use a pea-sized amount. It’s the single most effective step for cutting any ingredient exposure. The risk assessment found it erases most heavy-metal concerns, and it make the tube last longer, which reduces waste.
  • Supervise young kids’ brushing. Children swallow more toothpaste than adults, so they’re the most relevant group for any ingestion concern. Use a rice-grain smear for under-3s and a pea for older kids.
  • Favor transparency. Choose brands that publish third-party testing for heavy-metal purity, especially if your paste contains hydroxyapatite, calcium carbonate, or bentonite clay.
  • Skip the purely cosmetic stuff. Titanium dioxide adds whiteness and nothing else. Check the ingredient list for “CI 77891” and pick a formula without it.
  • Keep brushing with an effective active. Fluoride (spit it out) or clinically supported hydroxyapatite both prevent cavities. Don’t trade a proven benefit for an unproven fear.
  • Ditch the tube where you can. Tablets, powders, and tinned formats avoid multi-layer plastic.
  • Don’t run the tap. Leaving the water running while you brush can waste up to four gallons of fresh water each time, even with a low-flow faucet.

Toothpaste is cleaner than the scariest headlines suggest and messier than the industry would like to admit. The contamination is real, the regulatory ceiling is too high, and the fixes are simple. Brush well, use less, read the label, and don’t let the noise talk you out of caring for your teeth.

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Editor’s Note: This article was originally published by Gemma Alexander on January 3, 2022, and was substantially updated in June 2026, when we added the 2025 findings on heavy-metal contamination, the FDA’s fluoride-supplement action, titanium dioxide regulation, and clinical evidence on hydroxyapatite.

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