Reading view

There are new articles available, click to refresh the page.

Ag fertilizer runoff likely will force more drinking water restrictions

The Raccoon River weaves past downtown Des Moines, Iowa, in June. One of the primary drinking water sources for the region, the river has high nitrate levels that have led to water restrictions for some 600,000 customers. (Photo by Cami Koons/Iowa Capital Dispatch)

For nearly a month, hundreds of thousands of Iowans have not been allowed to water their lawns — even though there’s no drought.

Local authorities previously asked the public to refrain from washing cars and filling pools. And some cities turned off splash pads in the height of summer heat.

While such measures are common during dry periods, there’s no shortage of water: Rather, the water in and around Des Moines contains too much nitrate, a natural component of soil and a byproduct of commercial fertilizer and livestock manure. Persistent rainfall has flushed nutrients out of fertilized fields into streams and rivers.

While the water bans are temporary, they’re the starkest sign yet of the state’s long-brewing struggle with high nitrate levels in streams and rivers that supply drinking water.

“It’s a big deal: the first time ever that lawn watering has been banned,” said Tami Madsen, executive director of Central Iowa Water Works, a regional water authority serving 600,000 people.

Federal law limits nitrate levels in drinking water because of its association with infant asphyxia, also known as blue baby syndrome. And a growing body of research has found links between nitrate consumption and cancer.

While Iowa’s problems are uniquely severe, nitrate levels are a rising concern in other regions, from California to the Chesapeake Bay. And climate change is expected to worsen the problem as more intense cycles of drought and severe storms increase farm runoff.

Iowa’s concentration of fertilized row crops and massive livestock confinements that produce tons of nitrogen-rich manure have caused concerns over increased nitrate levels for years. And the state’s unique underground system of farm drainage pipes quickly pumps nitrate and other nutrients into streams and rivers.

The water system serving the Des Moines metro area has invested heavily in nitrate filtration and removal equipment. The primary facility in Des Moines, one of the largest nitrate removal systems in the world, costs $16,000 per day to operate, Madsen said.

“I’m confident in our ability to continue to provide safe drinking water,” Madsen said. “It’s just going to be at what cost.”

More frequent and extreme storms because of climate change will heighten the problems nationwide, said Rebecca Logsdon Muenich, an associate professor of biological and agricultural engineering at the University of Arkansas.

Because nitrogen travels with water, nitrate levels are especially hard to control during times of severe weather.

Muenich said farm conservation practices such as establishing wetlands and landscape buffers can help keep nitrogen out of water supplies. But the growth of the livestock industry, availability of cheap crop fertilizer and lack of regulation over nitrogen application make nitrate levels hard to control.

“We’ve kind of put ourselves in a bind unless we start investing in better technologies or more conservation,” she said.

The role of agriculture

As hundreds of thousands of residents were being asked to conserve water last month, a group of 16 experts released a years-in-the-making report analyzing the quality of the Raccoon and Des Moines rivers, the main sources of drinking water for the Des Moines region.

The researchers found that central Iowa rivers have some of the nation’s highest nitrate levels, routinely exceeding the federal drinking water standard. While some pollutants are naturally occurring, the researchers concluded that most of the nitrogen in the two rivers comes from farmland.

Commissioned in 2023 by Polk County, the state’s most populous county and home to Des Moines, the report underscored the connection between industrial agriculture and water quality.

Central Iowa rivers have some of the nation’s highest nitrate levels.

Larry Weber, a professor of civil and environmental engineering at the University of Iowa who worked on the report, said Iowa’s problem spreads to other areas: Iowa waterways export hundreds of millions of pounds of nitrogen per year, much of it flowing into the Mississippi River and eventually the Gulf of Mexico’s dead zone.

He said water restrictions may become more common as more cities confront high nitrate levels.

“This is happening more frequently and it’s going to continue to happen more frequently,” he said.

Weber said individual farmers aren’t necessarily to blame for the crisis. They’re doing their best to survive market demands and operate within federal farm policy. But he said the broader industry and the state could do more to invest in conservation methods to prevent pollution.

He noted that Iowa lawmakers in 2023 cut $500,000 for a water quality monitoring network across the state. While the Iowa Nutrient Research Center received a short-term grant to stay open, Weber said next year it will shut down 75 sensors that measure nitrate and other pollutants in state waters.

“The agricultural system doesn’t want this unfortunately difficult information to be made available,” he said.

A spokesperson for the Iowa Farm Bureau referred questions to the state agriculture department.

In a statement to Stateline, Agriculture Secretary Mike Naig, a Republican, said many Iowa groups are working on conservation and infrastructure projects to improve water quality.

“We’re not interested in stoking animosity between rural and urban neighbors,” the statement said. “Agriculture, conservation, recreation, urban and rural development, and business growth can and must co-exist in Iowa.”

In a lengthy social media post last month, Naig said nitrate levels were primarily driven by weather and stream flows. The secretary said advances in farming practices can help farmers apply fertilizer more efficiently and touted efforts such as new wetlands and structures that reduce stream erosion. But he said the fast-growing Des Moines area also needed to examine its investments in water treatment infrastructure to meet future needs.

“The blame game is unproductive,” he wrote.

On Tuesday, Naig’s department announced a $1.9 million water quality project upstream of Des Moines. That project will install landscape buffers and bioreactors to help reduce runoff of nitrate and other nutrients. The department is contributing $244,000 of that money.

Matt McCoy, chair of the Polk County Board of Supervisors, said that local government is trying to work with landowners and farmers to prevent water pollution. The county has spent millions on projects to seed cover crops and plant vegetative buffers between fields and waterways to prevent runoff of pollutants, including nitrogen.

“I don’t think we want to disparage agriculture and farming because it’s such a big part of who we are as a state,” McCoy said.

A former Democratic state lawmaker, McCoy said the recent water restrictions and daily news reports on nitrate levels in local rivers have elevated public awareness of water quality concerns.

“There are conversations that I know are happening now that were not happening prior to the restrictions,” he said.

Citizen action

The water restrictions in Iowa sparked an influx of interest from locals in the Izaak Walton League of America’s Nitrate Watch program, which provides volunteers with nitrate test kits and maps the results from across the country.

Heather Wilson, the league’s Midwest Save Our Streams coordinator, said the nonprofit environmental organization received more than 300 inquiries from Iowans during a single week in June. For comparison, the organization received about 500 inquiries from across the nation during the first six months of the year.

I feel like I’m meticulously documenting the death of my home and nobody else gives a rip.

– Northeast Iowa retired science teacher Birgitta Meade

While the problems in the Des Moines area are severe, she said, volunteers are recording rising nitrate levels across the state. The project gives people who can often feel helpless an active way to contribute to the understanding of nitrate pollution.

“It’s really empowering to be able to put resources in people’s hands so that they can measure the waterways that they personally care about,” she said.

Retired science teacher Birgitta Meade has been testing nitrates around her rural northeast Iowa home for years both as classroom instruction and for Nitrate Watch.

“They’re higher than I have ever tested at any prior point,” she said. “I feel like I’m meticulously documenting the death of my home and nobody else gives a rip.”

Meade said she’s considering investing in a reverse osmosis system to remove nitrates from her home’s private well. Though her nitrate levels are below the federal drinking water standard, she pointed to the growing body of research linking cancer with consumption of nitrate — even at lower levels.

Meade acknowledged the pressures facing farmers, but she said she grows frustrated every time she drives past giant storage containers full of fertilizer and other farm chemicals.

“These are people who are choosing to poison their neighbors,” she said. “And this is just untenable.”

Small towns struggle

Climate change will only intensify nitrogen pollution, said Thomas Harter, a professor and water researcher at the University of California, Davis. Last year, he worked on research that found drought and heavy rains accelerate the speed of nitrogen absorption into groundwater.

In some parts of California’s Central Valley, nearly a third of drinking and irrigation wells exceed federal nitrogen standards.

“We are ever more productive on the grower side, and that means more fertilizer being used and more fertilizer being lost to groundwater and to streams,” Harter said.

That’s particularly challenging for drinking water systems serving small population bases.

“It gets really expensive for really small systems and it’s also a lot of maintenance,” he said.

That’s a reality currently facing Pratt, Kansas, a community of about 6,500 people, where some wells have recorded nitrate levels above the federal standard.

City Manager Regina Goff said nitrate levels are pushing the community’s pursuit of a new water treatment facility that’s expected to cost upward of $45 million. The city’s proposed 2025 budget totaled about $35.7 million.

Goff said the city is exploring financing options, including potential grants. But she said it’s frustrating for the town to spend so much to meet regulatory standards for safe drinking water, which she characterized as an “unfunded mandate.”

Currently, nearly a quarter of the city’s groundwater supply is unavailable because of high nitrate levels. But the city must notify residents of high nitrate levels even in wells that are not pumping.

“It causes a panic,” Goff said. “That’s been a hard pill for us to swallow as a city — that we have to alarm our population even though we know there’s no possibility of harm.”

Editor’s note: This story has been updated to correct the name of the Izaak Walton League of America.

Stateline reporter Kevin Hardy can be reached at khardy@stateline.org.

Stateline is part of States Newsroom, a nonprofit news network supported by grants and a coalition of donors as a 501c(3) public charity. Stateline maintains editorial independence. Contact Editor Scott S. Greenberger for questions: info@stateline.org.

The real cost of the ‘Big, Broken Bill’: Why Wisconsin can’t afford to lose our clean energy future

By: John Imes
Rural landscape, red barn, farm, Wisconsin, bicycle

Photo by Gregory Conniff for Wisconsin Examiner

The U.S. Senate is currently working on its version of  the so-called “One Big Beautiful Bill Act”—a deeply misleading attempt to dismantle the Inflation Reduction Act (IRA) and derail America’s clean energy future.

Let’s be clear: This isn’t just political posturing. This bill, backed by fossil fuel interests and already passed in the House, would strip away the very tools Wisconsin families, businesses, farmers and communities are using to lower energy costs, create jobs and build a more resilient future. The damage to our state would be both immediate and long-term.

In Wisconsin alone, 82 clean energy projects are currently in the pipeline. These projects represent not just thousands of jobs and billions in investment — they’re the backbone of a 21st-century economy. From wind turbine manufacturing in Milwaukee’s Menomonee Valley to solar installations in rural communities, Wisconsinites are hard at work powering our future.

If the “Big, Broken Bill” becomes law, it threatens to cancel or delay many of these efforts. Clean energy tax credits would vanish. The Solar for All program and clean manufacturing investments would be eliminated. Tax incentives for electric vehicles, energy-efficient buildings, and sustainable agriculture would be repealed. These aren’t just policy tools — they’re direct investments in our people, places and potential. Many Wisconsin communities have used these credits to launch local projects that reduce taxpayer dollars through direct pay for solar, geothermal and clean vehicles.

And we can’t afford to go backward. Energy demand is skyrocketing — especially with the rapid expansion of AI and data centers. Experts warn electricity bills could jump by 70% in the next five years if we don’t act. Clean, renewable energy remains the cheapest and fastest option to deploy. Gutting these investments would lead to higher prices, more power interruptions and less energy reliability — leaving Wisconsin families and businesses to bear the cost.

Without these programs, household energy costs could rise by up to $400 a year. That’s a hidden tax hike on working families — piled on top of rising costs from tariffs and supply chain disruptions already straining our economy.

Even worse, the bill guts EPA pollution standards and allows major polluters to sidestep environmental compliance. It’s a taxpayer-funded giveaway to fossil fuel interests, trading our health, air and water for short-term corporate profits.

Let’s not forget Wisconsin’s farmers, who were just beginning to benefit from billions in IRA investments for conservation, renewable energy and carbon-smart agriculture. With grant contracts abruptly canceled, many family farms are left holding the bag, having made plans in good faith only to be blindsided.

We can do better. Wisconsin has the talent, tools and environmental leadership tradition to lead the clean energy economy. Clean energy already supports more than 71,000 jobs in our state. With the right investments, we could add 34,000 more and grow our economy by $21 billion by 2050.

We’re also home to over 350 clean energy supply chain companies. With support from IRA tax credits and the Wisconsin Economic Development Corporation (WEDC), we can expand local manufacturing of batteries, solar panels, wind components, EV systems and smart grid technology — positioning Wisconsin as a national clean energy hub.

This is the kind of forward-thinking, common-sense investment we need. It creates good jobs, lowers energy bills, strengthens supply chains and revitalizes communities.

The Senate still has time to act. Let’s urge our lawmakers, regardless of party, to reject this harmful bill and stand with the workers, innovators and families building a cleaner, stronger Wisconsin. Our policies should reflect our shared values of fairness, innovation, resilience and stewardship — not special treatment for polluters.

This isn’t about partisan politics. It’s about economic survival, energy independence and the future we want to leave our children.

It’s time to move forward, not backward, with a smarter stronger, and more sustainable Wisconsin.

GET THE MORNING HEADLINES.

Wisconsin Supreme Court rules spills law applies to PFAS

The seven members of the Wisconsin Supreme Court hear oral arguments. (Henry Redman/Wisconsin Examiner)

In a 5-2 ruling on Tuesday, the Wisconsin Supreme Court affirmed the Department of Natural Resources’ (DNR) authority to regulate polluters who produce hazardous substances such as PFAS through the state’s toxic spills law. 

The court’s ruling reverses the decisions of the circuit and appeals courts that could have threatened the DNR’s ability to force polluters to pay for the environmental damage they cause. For more than 40 years, the spills law has allowed the DNR to bring civil charges and enforce remediation measures against parties responsible for spills of “harmful substances.” 

The lawsuit was brought by an Oconomowoc dry cleaner and Wisconsin Manufacturers and Commerce (WMC), the state’s largest business lobby, after the owner of the dry cleaner, Leather Rich Inc., found PFAS on her property. 

In preparation to sell the business, Leather Rich had been participating in a voluntary DNR program to remediate contamination on its property in exchange for a certificate of liability protection from the department. During that process, the DNR determined that PFAS should be considered a “hazardous substance” under the spills law and communicated that on its website. 

If PFAS were present on a site, the DNR stated, participants in the voluntary program would only be eligible for partial liability protection. 

While conducting a site investigation through the program, Leather Rich determined three of four wells on the property exceeded Department of Health Services standards for PFAS concentration in surface or drinking water. The DNR requested that future reports from Leather Rich to the department include the amount of PFAS found on the property. Leather Rich responded by withdrawing from the program and filing suit. 

At the circuit and appeals courts, Leather Rich was successful, with judges at each level finding that the decision by the DNR to start considering PFAS a “hazardous substance” under the spills law constituted an “unpromulgated rule” and therefore was against the law. That interpretation would have required the DNR to undergo the complicated and often yearslong process of creating an administrative rule each time it determines that a substance is harmful to people or the environment.

SpillsLawDecision

In the majority opinion, authored by Justice Janet Protasiewicz and joined by the Court’s three other liberal leaning justices and conservative Justice Brian Hagedorn, the Court found that the DNR spent nearly 50 years administering the spills law responding “to about 1,000 spills each year, without promulgating rules listing substances, quantities, and concentrations that it deems ‘hazardous substances.’”

Protasiewicz wrote that when the Legislature wrote the spills law, it left the definition of “hazardous substance” intentionally open-ended but required a potentially harmful substance to meet certain criteria if it would apply under the law. 

“The definition of ‘hazardous substance’ is broad and open-ended in that it potentially applies to ‘any substance or combination of substances,’” Protasiewicz wrote. “But the definition is limited in that the substance or combination of substances must satisfy one of two fact-specific criteria.” 

She wrote that the law considers “a substance or combination of substances is ‘hazardous’ if,” its quantity, concentration or characteristics may cause or contribute to an increase in mortality or serious illness or may pose a potential hazard to human health or the environment

Leather Rich and WMC had argued that the Legislature’s failure to include chemical thresholds in the statutory text left while including the use of terms like “significantly,” “serious,” and “substantial,” meant that the law was ambiguous and therefore any DNR determinations of what counts as hazardous must be delineated in an administrative rule. They argued that under this interpretation of statute, spilling milk or beer on the ground could constitute a toxic spill. 

Protasiewicz wrote if that were the case, “then scores of Wisconsin statutes on a wide range of subjects would be called into doubt,” and that their hypotheticals are undermined by the text of the statute. 

“It is possible for an everyday substance like milk or beer to qualify as a ‘hazardous substance,’ but only if it first satisfies [the statute’s] fact specific criteria,” she wrote. “A mug of beer or a gallon of milk spilled into Lake Michigan may not ‘pose a substantial present or potential hazard to human health or the environment,’ but a 500-gallon tank of beer or milk discharged into a trout stream might well pose a substantial present hazard to the stream’s fish and environment.” 

The majority opinion also found that communications the DNR made on its website and in letters to Leather Rich counted as “guidance documents” not as rules.

Justice Rebecca Grassl Bradley, who once gave a speech to WMC in which she declared to the business lobby that “I am your public servant,” wrote in a dissent joined by Chief Justice Annette Ziegler that the majority’s interpretation of the spills law left the state vulnerable to a “tyrannical” government that could both create the rules and enforce them. 

“This case is about whether the People are entitled to know what the law requires of them before the government can subject them to the regulatory wringer,” she wrote. “The majority leaves the People at the mercy of unelected bureaucrats empowered not only to enforce the rules, but to make them. Americans have lived under this unconstitutional arrangement for decades, but now, the majority says, the bureaucrats can impose rules and penalties on the governed without advance notice, oversight, or deliberation. In doing so, the majority violates three first principles fundamental to preserving the rule of law — and liberty.” 

After the decision’s release, Democrats and environmental groups celebrated its findings as an important step to protecting Wisconsin’s residents from the harmful effects of pollution. 

“This is a historic victory for the people of Wisconsin and my administration’s fight against PFAS and other harmful contaminants that are affecting families and communities across our state,” Gov. Tony Evers said in a statement. “The Supreme Court’s decision today means that polluters will not have free rein to discharge harmful contaminants like PFAS into our land, water, and air without reporting it or taking responsibility for helping clean up those contaminants. It’s a great day for Wisconsinites and the work to protect and preserve our state’s valuable natural resources for future generations.”

But WMC said the Court’s interpretation leaves businesses guessing what substances count as hazardous under the law. 

“The DNR refuses to tell the regulated community which substances must be reported under the Spills Law, yet threatens severe penalties for getting it wrong,” Scott Manley, WMC’s Executive Vice President of Government Relations, said in a statement. “Businesses and homeowners are left to guess what’s hazardous, and if they’re wrong, they face crushing fines and endless, costly litigation. This ruling blesses a regulatory approach that is fundamentally unfair, unworkable, and impossible to comply with.”

GET THE MORNING HEADLINES.

Air quality worsens in eastern US as Canadian wildfire smoke hangs over Midwest

Electronic sign above highway says “AIR QUALITY ALERT CONSIDER REDUCING TRIPS”
Reading Time: 3 minutes

Smoke from Canadian wildfires started making air quality worse in the eastern U.S. on Wednesday as several Midwestern states battled conditions deemed unhealthy by the federal government.

The fires have forced thousands of Canadians to flee their homes and sent smoke as far as Europe.

In the U.S., smoke lingered on the skylines of cities from Kansas City to Minneapolis, and a swath of the region had unhealthy air quality Wednesday, according to an Environmental Protection Agency map.

In Stoughton, Wisconsin, Nature’s Garden Preschool was keeping its kids indoors Wednesday due to the bad air quality, which interferes with the daily routine, said assistant teacher Bailey Pollard. The smoke looked like a coming storm, he said.

The 16 or 17 kids ages 12 weeks to 5 years old would typically be outdoors running or playing with water, balls and slides, but were instead inside doing crafts with Play-Doh or coloring. The situation was unfortunate because kids need to be outside and have fresh air and free play, Pollard said.

“It’s something where we’ve got to take precaution for the kids,” he said. “Nobody wants to stay inside all day.”

Iowa issued a statewide air quality alert through early Thursday, urging residents to limit certain outdoor activities and warning of possible health effects due to the thick smoke. Wisconsin officials made similar suggestions as the smoke drifted southeast across the state.

In Michigan’s Upper Peninsula, authorities advised people to shut windows at night, avoid strenuous activity outside and watch for breathing issues.

Parts of Maine, Vermont, New Hampshire and New York had areas of moderate air quality concern, and officials advised sensitive people to consider reducing outdoor activity.

Unhealthy conditions persist in Midwest

The Minnesota Pollution Control Agency issued an alert for almost the entire state into Wednesday, but the Twin Cities area got the region’s worst of it Tuesday.

Children’s Minnesota, a network of pediatric clinics and hospitals in the Twin Cities area, has seen a “modest increase” increase this week in patients with symptoms that doctors attributee to polluted air, Dr. Chase Shutak said.

Their symptoms have included breathing problems, including asthma and other upper respiratory issues, said Shutak, who stays in close touch with other pediatricians in his role as medical director of the Minneapolis primary care clinic at Children’s.

The Iowa Department of Natural Resources warned that air quality in a band from the state’s southwest corner to the northeast could fall into the unhealthy category through Thursday morning. The agency recommended that people — especially those with heart and lung disease — avoid long or intense activities and to take extra breaks during strenuous activity outdoors.

Conditions at ground level are in the red

The U.S. Environmental Protection Agency’s AirNow map showed a swath of red for “unhealthy” conditions across Wisconsin and northern Iowa. Northern Michigan was also the site of many unhealthy zones, the agency said. The Air Quality Index was around 160 in many parts of the upper Midwest, indicating unhealthy conditions.

The Air Quality Index — AQI — measures how clean or polluted the air is, focusing on health effects that might be experienced within a few hours or days after breathing polluted air. It is based on ground-level ozone, particle pollution, carbon monoxide, sulfur dioxide, and nitrogen dioxide. Particulates are the main issue from the fires.

The index ranges from green, where the air quality is satisfactory and air pollution poses little or no risk, to maroon, which is considered hazardous. That level comes with health warnings of emergency conditions where everyone is more likely to be affected, according to AirNow.

There were areas of reduced air quality all over the U.S. on Wednesday, with numerous advisories about moderate air quality concerns as far away as Kansas and Georgia.

The air quality was considerably better Wednesday in Minnesota, where only the barest hint of haze obscured the downtown Minneapolis skyline. The city experienced some of the worst air in the country on Tuesday. But the air quality index, which had reached the mid-200 range, or “very unhealthy” on Tuesday, was down to 60, or “moderate,” by Wednesday afternoon.

The Canadian fire situation

Canada is having another bad wildfire season. Most of the smoke reaching the American Midwest has been coming from fires northwest of the provincial capital of Winnipeg in Manitoba.

Canada’s worst-ever wildfire season was in 2023. It choked much of North America with dangerous smoke for months.

The smoke even reaches Europe

Canada’s wildfires are so large and intense that the smoke is even reaching Europe, where it is causing hazy skies but isn’t expected to affect surface-air quality, according the European climate service Copernicus.

This story was written by the Associated Press’ Patrick Whittle, in Portland, Maine, and Steve Karnowski, who reported from Minneapolis. Associated Press writers Jack Dura in Bismarck, North Dakota; Kathy McCormack in Concord, New Hampshire; Tammy Webber in Fenton, Michigan; and Scott McFetridge in Des Moines, Iowa, contributed to this report.

Wisconsin Watch is a nonprofit and nonpartisan newsroom. Subscribe to our newsletters to get our investigative stories and Friday news roundup. This story is published in partnership with The Associated Press.

Air quality worsens in eastern US as Canadian wildfire smoke hangs over Midwest is a post from Wisconsin Watch, a non-profit investigative news site covering Wisconsin since 2009. Please consider making a contribution to support our journalism.

❌