winona county Archives

winona county

August 25, 2023

Advising farmers on fertilizer, universities add to water pollution woes

By Keith Schneider

WINONA, Minn. – Corn drapes every curve and rise here in Winona County, Minnesota – seemingly endless fields of grain that contribute to the food, fuel and finances of a robust US agricultural economy.

But the bucolic landscape belies a dark and dangerous truth: Much of the groundwater in the porous limestone beneath this area of southeast Minnesota is contaminated with some of the nation’s highest levels of nitrates – harmful pollutants released into the environment by the use of nitrogen chemicals and livestock manure as fertilizer on farmland.

Close to 200 wells in the county have been contaminated with nitrates at levels higher than what is considered safe, according to state officials and in parts of Winona County, half of all households have nitrate-contaminated drinking water. It’s frightening data for area residents because nitrates are linked to a range of health problems, including heart and lung problems and certain cancers. Nitrates are known to be particularly dangerous for babies.

Crop and livestock production accounts for roughly 70% of the state’s nitrate pollution, according to the Minnesota Pollution Control Agency, a fact that recently led a coalition of 11 state and national environmental groups to petition federal regulators to investigate.

The groups are calling on the Environmental Protection Agency (EPA) to protect residents of Winona and seven other southeast Minnesota counties from “imminent and substantial endangerment” caused by nitrate contamination. The agency’s regional office has begun to interview state officials.

The issue is not unique to Minnesota. State and federal data show that since 1990, nitrogen spread on fields in ten major US corn-growing states has increased 26%, with more nitrogen than ever pouring off the land and into US waters.

April 28, 2023

Groups seek emergency action from EPA on nitrate pollution in Minnesota

A coalition of environmental groups is petitioning federal regulators to take emergency action to protect residents of southeastern Minnesota from “imminent and substantial endangerment’ to their health from the contamination of drinking water sources by a pollutant linked to cancers and other health problems.

Nitrate contamination in the region ” is a widespread issue that has stubbornly persisted through decades as state officials continuously fail to effectively address the problem,” the petition states.

The effort echoes pleas from public and environmental health advocates around the country over the harmful impacts of nitrate contamination, which mainly originates in agricultural runoff. Nitrate contamination of drinking water has been linked to “blue baby syndrome,” or methemoglobinemia (a sometimes-fatal condition affecting infants), as well as certain cancers, and thyroid disease, even in studies where contamination was below legal limits.

High levels of nitrate in water can be a result of runoff or leakage from fertilized farm fields, landfills, animal manure, and other sources.

The petition calls on the US Environmental Protection Agency (EPA) to use its powers under the Safe Drinking Water Act to ensure safe drinking water for Minnesota residents, calling nitrate pollution a “too-long ignored health crisis.” Among other steps, the groups want the EPA to block the development of new large animal feeding operations, which are considered significant contributors to nitrate pollution because of the large amounts of animal manure generated.

“We need help,” said Jeff Broberg, director of the Minnesota Well Owners Organization whose own well water is contaminated with nitrates. “Our drinking water quality keeps getting worse.”