How One Iowa County Spent $40 Million So You Can Actually Trust Your Tap Water

We know there are treatment plants working overtime to make river water safe enough to drink. We hear about nitrate warnings and algae blooms and agricultural runoff, and we just… trust that somebody’s handling it. That the treatment facilities can clean up whatever makes it into the rivers.

But here’s the thing: it’s a lot cheaper and smarter to keep pollution out of rivers in the first place than to spend billions filtering it out after the fact.

Polk County, Iowa figured this out and decided to do something about it.

Over the past five years, they’ve invested nearly $40 million in making their rivers swimmable again. Not someday. Not eventually. Now.

And here’s what makes this story matter beyond Iowa: they’re proving it can be done, they’re showing others how to do it, and they’re building a model that could work in your community too.

What They Actually Did (And Why It Matters to Your Family)

Let’s talk about what $40 million buys when you’re serious about clean water.

• Wetlands that work like kidneys. The Wetland Wave program has built 14 wetlands so far, with 28 more in the works. These aren’t decorative ponds—they’re strategically placed natural filters that treat runoff from over 25,000 acres of farmland before it reaches rivers. Think of them as the Earth’s kidneys, filtering out nitrogen, phosphorus, and sediment that would otherwise flow downstream into the water your kids might swim in or that becomes your drinking water.
• The biggest stream restoration project in Iowa’s history. The Eastern Polk Stream Restoration Project is tackling 10 miles of degraded streams—both urban and rural—by the end of 2026. When streams are restored properly, they don’t just look prettier. They filter water naturally, reduce flooding, create habitat, and become places families actually want to visit.
• Farmers as part of the solution, not the problem. The Batch and Build program has installed 185 conservation practices treating 6,000 acres of tile drainage. These include saturated buffers and bioreactors—systems that intercept and treat water before it leaves farmland. The program was so successful that 13 Iowa counties and four other Midwest states are now using the model.
• Cover crops that hold soil in place. The Ag-Urban Cover Crop Seeder Program has seeded over 27,000 acres across 100 farming operations in 13 counties. Cover crops prevent soil erosion, reduce fertilizer runoff, and improve water quality. The program brought together urban and agricultural partners to buy state-of-the-art equipment, proving that cities and farms can work together instead of pointing fingers at each other.
• Urban residents doing their part. Since 2019, the Rain Campaign has helped urban residents install over 2,000 conservation practices—rain gardens, bioswales, permeable pavement, rain barrels. Because water quality isn’t just a rural issue. Fertilizers from lawns, runoff from parking lots, and stormwater from streets all contribute to the problem.

Why This Matters to You (Even If You Don’t Live in Iowa)

Water doesn’t respect county lines. The Des Moines and Raccoon Rivers that Polk County is cleaning up flow into the Mississippi River system. What happens upstream affects everyone downstream.

But more importantly, Polk County is proving something that matters everywhere: you don’t have to accept polluted water as inevitable.

For too long, we’ve treated clean rivers as a luxury—something nice to have but not essential. Meanwhile, we spend billions on water treatment facilities to clean up water we polluted in the first place. It’s like mopping up a spill while the faucet is still running.

Polk County decided to turn off the faucet.

They commissioned a comprehensive study—16 scientists from across the U.S. and Iowa analyzing water quality in their rivers. Not to assign blame, but to understand the problem so they could fix it. Then they put real money behind real solutions.

The result? A model that other communities can follow.

What This Means for Your Kids’ Health

Let’s get specific about why clean water matters to families:

• Safer drinking water. Des Moines draws drinking water from these rivers. Every dollar spent keeping pollution out of rivers is a dollar saved on water treatment—and better protection for public health. Nitrates in drinking water are particularly concerning for infants and pregnant women. Reducing agricultural runoff reduces nitrate levels.
• Swimmable rivers. When was the last time your community had a river clean enough for swimming? When rivers are healthy, they become recreational assets. Places for families to kayak, fish, wade, and connect with nature. That’s not just nice—that’s essential for kids’ physical and mental health.
• Better air, better ecosystems. Healthy watersheds mean healthier ecosystems overall. Wetlands filter air pollutants. Restored streams create corridors for wildlife. These aren’t separate issues—they’re all connected to the health of our communities.
• Economic benefits. Clean rivers attract businesses, increase property values, draw tourism, and reduce public health costs. This isn’t tree-hugging—this is smart economics.

The Model That’s Spreading

Here’s what makes Polk County’s approach different: they’re not hoarding their success.

The Batch and Build program started in Polk County in 2020. By 2025, it’s operating in 13 Iowa counties and four states. Why? Because it works, and because Polk County is actively helping other communities implement it.

The Cover Crop Seeder Program brought together agricultural and urban partners to jointly invest in equipment. That partnership model—cities and farms working together instead of blaming each other—is replicable anywhere.

The Wetland Wave is targeted and strategic, not random. They’re placing wetlands where they’ll have maximum impact on water quality. Other communities can follow the same science-based approach.

And all of this is backed by rigorous research. The Eastern Polk Stream Restoration Project includes a full research team quantifying water quality benefits. That data will help other communities make the case for similar investments.

What You Can Do (Yes, Actually You)

If you’re reading this thinking “that’s great for Iowa, but what about my community,” here’s your action plan:

1. Find out what your local government is doing about water quality. Most counties and municipalities have some water quality initiatives. Are they adequately funded? Are they science-based? Are they ambitious enough?
2. Look at the CISWRA report. Polk County made their comprehensive scientific assessment public. It’s a roadmap for what a serious water quality study looks like. Your community could commission something similar.
3. Connect agricultural and urban communities. Too often, cities blame farmers and farmers feel attacked by cities. Polk County’s programs work because they brought these groups together. What would that look like in your area?
4. Start in your own yard. The Rain Campaign proves that individual actions add up. Rain gardens, native plantings, reduced fertilizer use, permeable surfaces—these aren’t symbolic gestures. Two thousand urban conservation practices make a measurable difference.
5. Advocate for real funding. Polk County invested $40 million. That’s real money for real solutions. Talk to your county supervisors, city council, state representatives. Ask them what they’re investing in clean water and whether it’s proportional to the problem.
6. Support farmers making the transition. Programs like Batch and Build work because they provide farmers with technical and financial support to implement conservation practices. Farmers want clean water too—they’re raising their kids in these communities. They need support, not blame.

The Bigger Picture

Polk County Board Chair Matt McCoy said it clearly: “We hope residents and community groups use this report as a guide to advocate and take positive actions to improve water quality at the local, state and national level.”

This isn’t just about Iowa. This is about changing how we think about water quality everywhere.

For generations, we’ve treated pollution as inevitable and spent our money cleaning up the mess. Polk County is showing a different path: invest in keeping water clean in the first place.

They’re proving it works. They’re sharing the model. They’re creating economic benefits alongside environmental ones. And they’re doing it in a way that brings farmers and cities together instead of driving them apart.

The question for every other community is simple: What are you waiting for?

Your kids deserve rivers they can swim in. Your families deserve drinking water that doesn’t need heavy treatment. Your communities deserve the recreation and economic benefits that come with healthy watersheds.

Polk County invested $40 million to make that happen. They’re not richer than your community. They’re not special. They just decided clean water was worth fighting for.

What would it take for your community to make the same commitment?

The science exists. The models exist. The funding mechanisms exist. What’s missing is the political will and community pressure to make it happen.

So here’s what you do: Share this story. Talk to your neighbors. Show up at county board meetings. Ask your representatives what they’re doing about water quality. Support the farmers who are trying to do better. Install that rain garden you’ve been thinking about.

Every river that’s clean enough for your kids to swim in started with someone deciding it was possible.

Polk County, Iowa decided it was possible. They put their money where their mouth was. And now they’re showing the rest of us what’s possible.

Want more information? Contact us today.