Calls grow for unity to solve Iowa's nitrate crisis
Why it matters: The consequences are apparent this year, but the problem has been getting worse for decades.
Understanding it can help unify the state to achieve lower nitrate levels more quickly, urban, farm and public utility advocates tell Axios.
Catch up quick: Nitrate levels at key water intake points surpassed the federal drinking water limit of 10 mg/L for about 40 more days this year compared with 2024 — a near-record period, according to data from Central Iowa Water Works (CIWW).
The DSM metro is also the fastest growing in the Midwest, creating a situation in which water utilities are struggling to remove enough nitrates to meet demand.
Flashback: In 2015, DSM Water Works — a member of Central Iowa Water Works (CIWW) — sued three northwest Iowa counties and multiple drainage districts in federal court, alleging they violated the Clean Water Act by not better controlling nitrates.
The legal battle caused political division before a judge dismissed the lawsuit in 2017, concluding that the widespread problems are for the Iowa Legislature to address.
State of play: Metro water utilities have been working on nitrate removal expansions for years, with new projects expected to come online in 2026, CIWW executive director Tami Madsen tells Axios.
Farmers are deploying dozens of types of projects like precision nitrogen management through the Iowa Nitrogen Initiative, an on-farm trail program at Iowa State University.
The use of cover crops in Iowa has grown from 50,000 acres in 2010 to over 4 million acres this year.
Friction point: The work needs to be greatly expanded, environmental advocates such as Polk County Conservation director Rich Leopold tell Axios.
The intrigue: Nearly two-thirds of Iowans voted in 2010 to amend the constitution and establish the Natural Resources and Outdoors Recreation Trust Fund — a permanent funding source for clean water, outdoor recreation, and habitat projects.
Yes, but: There's still no money because the Legislature has not increased the state sales tax by three-eighths of a cent to fund it.
Gov. Kim Reynolds identified funding the Trust Fund as a top priority in early 2020, which would generate an estimated $220 million annually for outdoor improvements.
The effort stalled just a few weeks later amid the economic uncertainties of the COVID-19 pandemic, and questions about its future have largely been postponed to future Condition of the State addresses.
Inside the room: Polk County Supervisors Chairperson Matt McCoy, a Democrat and former state senator, called on the Legislature to act on the trust fund during a July 1 meeting when the county publicly released its 200-plus-page river report.
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