Hey everyone, Sarah here, co-owner and head of product at Pure Water Systems. If you’ve ever picked up a water filter or system for your home or small business, you’ve probably wondered one thing after you run the first jug: “Wait, is this thing actually good for the planet?” As someone who’s spent the last 7 years testing, building, and selling these systems, I get that question all the time—and it’s way more complicated than just “good” or “bad.” Today I’m breaking down the real environmental impact of the pure water systems we build, the tradeoffs we actually face, and what we’re doing to keep our footprint as small as possible. Pure Water System
First, let’s get super real about what a pure water system even does, because not all of them are the same. The big ones people deal with are point-of-use (POU) systems for under sinks, whole-home systems, and even commercial setups for small cafes or offices. Most of the ones we sell use reverse osmosis (RO) or activated carbon filters—nothing fancy, no weird proprietary tech that costs a fortune or breaks easily. The core job is to strip out stuff you don’t want: chlorine, lead, microplastics, even some pesticides. That part is non-negotiable, because a lot of municipal water still has trace contaminants, and well water can have way worse stuff like nitrates or iron that’s a pain to filter out any other way.
Now, the first thing everyone points to as a con: wastewater. RO systems make a ton of “reject water”—the stuff that gets flushed down the drain, right? Old school RO units (like the ones your dad had in the 90s) would spit out 3 or 4 gallons of wastewater for every 1 gallon of pure water they made. That’s a huge turnoff, I get it—wasting water to make drinking water feels backwards. But here’s what most people don’t know: we’ve spent years tweaking our system designs to cut that waste down. Our current models hit a 2:1 ratio, and some of our newer commercial ones get as low as 1.1:1. How? We added a permeate pump and a storage tank that recycles some of that reject water for flushing or even watering plants if you want to hook it up. I’ve had so many customers tell me they thought RO was a water hog until they saw their actual bill drop a little because they’re not buying plastic water bottles anymore. Wait, that’s another big one—bottled water. Let’s talk about that elephant in the room. The average American drinks like 50 gallons of bottled water a year, right? A single 1-liter plastic bottle takes about 1.3 liters of water to make, plus all the oil for plastic, shipping, and the carbon from transporting it. If a family of 4 switches from bottled water to our POU system, they skip like 1,200 plastic bottles a year. That’s not a small number. Let’s do the math: that’s 1,560 liters of water saved just from not making bottles, plus all the emissions from trucking them to the grocery store, stacking them in a warehouse, and then hauling them home. Even if our system uses 100 gallons of reject water a year, that’s nothing compared to the 5,000+ gallons of bottled water waste they’re skipping.
But wait, I’m not here to sugarcoat the bad stuff. Pure water systems aren’t perfect, and there are real environmental hits we can’t ignore. First, there’s the manufacturing side. All those plastic parts, the filters, the membranes—they have a footprint. The RO membrane, for example, is made of polyamide, a plastic that takes ages to break down. Then there’s the electricity. RO systems need a small pump to push water through the membrane, so they use a little bit of power. If you run it off grid electricity from coal? That’s a problem. If you run it off solar? Way better. That’s why we’ve started pre-wiring all our residential systems to work with small solar setups, and we even offer a discount if customers use solar or have a utility that gives green energy credits. Another thing: filter replacement. Most people think a pure water system is a set-it-and-forget-it thing, but no—sediment filters need to be changed every 6-12 months, carbon filters every 12-18 months, and RO membranes every 2-5 years. If you throw those in the trash, they end up in landfills, releasing microplastics as they break down. That’s why we started a take-back program last year. Customers can send their old filters and membranes back to us for free, and we partner with a facility that recycles the membrane into new plastic parts for things like park benches, or even filters for wastewater treatment plants. We don’t make a dime off that program—we just think it’s the right thing to do. A lot of companies just tell you to toss them, so I’m proud we’ve stepped up here.
Now, let’s compare that to the alternative, because this is where a lot of people miss the mark. What’s the real “greener” option? Bottled water is terrible, right? We all know that. But what about tap water? A lot of people say “just drink tap water, it’s fine.” But is it? Not always. A 2023 study from the NRDC found that over 100,000 public water systems in the US have trace amounts of PFAS (forever chemicals) that don’t get removed by standard municipal treatment. Lead pipes in old homes leach lead into water, especially when it’s been sitting in the pipes overnight. If you have well water, you might not even be hooked up to a system that tests for contaminants regularly. So if your tap water isn’t safe, what do you do? Either drink bottled water, which is way worse, or get a pure water system. So it’s not “pure water system vs. tap water”—it’s pure water system vs. bottled water, which is the real polluter here. Let’s also talk about long-term use. Our residential systems last 10-15 years, right? That’s way longer than most cheap off-brand systems you can buy at the big box store. A lot of those cheap ones break in 2 years, and you throw the whole thing away. Our systems are built with durable parts, and we offer a 5-year warranty, so we stand behind them. We also do free annual checkups for all our customers for the first 3 years, so we can catch leaks or inefficiencies before they become a problem. That means fewer units ending up in landfills over time.
Another thing people don’t talk about: the water utility side. Wait, how do our systems affect municipal water demand? If more people install pure water systems, does that mean less strain on treatment plants? A lot of utilities pump more water than necessary to meet peak demand, and then treat it, only to have some of it wasted as runoff or just not used. If a home uses a pure water system that reduces their need to buy bottled water, that’s a small reduction in overall demand, which can mean less energy used to pump and treat water for the utility. It’s not a huge shift, but every little bit adds up, especially as more people get on board. But let’s be real, there are still gaps. We’re working on making our filters even more recyclable. Right now, we can recycle the RO membranes, but the plastic casings are still tricky. We’re testing a new type of casings made from recycled plant-based plastic, like corn starch, that breaks down way faster than regular plastic, and we’re hoping to roll that out by next year. We’re also working on a system that uses gravity instead of electricity for the pump, which would cut power use by like 80% for small residential units. That’s a big one, especially for people who don’t have solar.
I think the biggest mistake people make is framing this as a black and white issue. Pure water systems aren’t evil, and they’re not perfect. They’re a middle ground that solves a real problem without making the planet’s pollution way worse. Let’s be honest: if I sold a system that used 5 gallons of water for every 1 gallon of pure water, and threw away all the filters, I wouldn’t be in business. We’ve spent the last 5 years iterating because we care about both our customers’ water and the planet. That’s why we don’t sell off-brand systems that cut corners on efficiency—we’d rather have fewer sales than sell something that hurts the environment.
Now, if you’re someone who’s been on the fence about getting a pure water system, whether it’s for your home, your small cafe, or your office, let’s chat. We can walk you through what kind of system you actually need (you don’t need a fancy commercial unit for a 2-person apartment, promise), answer all your questions about wastewater, filter replacement, and our take-back program, and even give you a breakdown of how much you’d save on bottled water and utility bills in a year. We’re not pushy salespeople—we’re just a group of people who care about clean water and a clean planet, and we want to help you make the best choice for your family and the environment.
So if you’re ready to stop buying plastic water bottles that end up in landfills, and get clean, safe water that doesn’t waste a ton of resources, reach out to us to talk through your needs. No pressure, no awkward pitches—just real answers from people who’ve been in this game for years. And if you’re not ready to buy, that’s cool too—next time you see a post about pure water systems, I hope you remember that it’s not a “good vs. bad” thing, it’s about balancing what we need now with what’s left for later.
Containerized Water Treatment System References
- Natural Resources Defense Council. (2023). Bottled Water and the Environment: A Critical Review of Impacts and Solutions.
- U.S. Environmental Protection Agency. (2022). Reverse Osmosis System Efficiency and Water Waste Reduction Standards.
- Pacific Institute. (2021). The Hidden Water Footprint of Plastic Bottled Water Production and Distribution.
- Water Research Foundation. (2023). Point-of-Use Pure Water System Lifespan, Maintenance, and End-of-Life Management Practices.
Hangzhou Nanoimp Environmental Technology Co., Ltd.
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