Adam Shriver is Director of Wellness and Nutrition at the Harkin Institute for Public Policy and Citizen Engagement. This essay was first published on his Substack newsletter, Canary in a Cornfield.
Iowa has a serious problem with nitrates in our drinking water that we’ve known about for decades, and these problems are only getting worse. Numerous studies—extremely high-quality studies—and detailed accounts of underlying biology all present a strong case that nitrates levels in drinking water lower than the current 10 mg/L NO3-N standard are linked to different types of cancer. We discussed that research in my interview with the Chair of a Denmark Ministry of the Environment Report, and the recent Cancer and Environmental Risk Factors in Iowa report covered those studies in detail.
For that reason, it’s extremely important for Iowans to have the best possible data measuring the amount of nitrate in our drinking water throughout the year.
Despite the urgency of the problem, the Iowa legislature cut off funding to the the University of Iowa’s IIHR Hydroscience and Engineering Water Quality Information System in 2024. The Walton Family Foundation agreed to step in and fund the network for two years, but they were very clear that this was only a temporary measure. In short, they were giving Iowa a couple years to get ourselves together.
What that means now: if the legislature does not restore funding in the state budget for fiscal year 2027, many of the sensors in the IIHR network may need to be removed or discontinued, putting Iowans at risk.
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