Iowa's water is polluted with farming nitrates and pesticides, but a potential solution challenges the 'status quo'

Crop and animal farm runoff has polluted at least
four Iowa rivers. (Adobe Stock photo)

In agriculturally dominated Iowa, what's good for corn producers gets top billing while residents face a deluge of polluted water. "In Iowa, which by some measures has the most polluted water in the U.S., people who advocate for the environment are widely scorned as enemies of farming," reports Peter Waldman of Bloomberg.

In a state where farmers spread copious amounts of pesticides, nitrogen fertilizers and nitrogen-rich manure, towns like Remsen, which is surrounded by Iowa corn country, are "saturated with pollution," Waldman writes. "Researchers have linked trace exposures to nitrate in drinking water to cancers, birth defects and thyroid disease. Iowa has the second-highest cancer rate in the U.S., after Kentucky."

Although concerned citizens, including many farmers, have pushed for fewer pesticides and nitrates, most efforts failed. "The state government has crushed almost every effort to hold farmers and agribusinesses accountable for their increasingly dirty footprint," Waldman explains. Last year, the EPA ordered Iowa to "add parts of four rivers to the state’s list of impaired waters needing cleanup, including the drinking supply for about a fifth of Iowa’s population."

Even with some of the state's drinking water in question, the state complained about the EPA's sanction, which the Trump administration lifted. Waldman reports, "Now even the feds defer to Big Ag, led in Iowa by the industry’s undisputed champion in the state, the Iowa Farm Bureau Federation."

Remsen is located in eastern Plymouth County, 
in the heart of Iowa's corn belt. (Adobe Stock photo)

Without support, Remsen's water continued to be polluted. Despite investigations, area wells were allowed to fill with possibly toxic nitrates. "From 2016 to 2020, Remsen’s five-year rate of colorectal cancer, one of the cancers associated with nitrate exposure, was 19% higher than Iowa’s," Waldman adds. "By 2017, the shallow wells that supplied Remsen’s drinking water were so loaded with nitrates they had to be shut down."

Farming without so many nitrates and pesticides is possible. Matt Liebman, a retired agronomy professor at Iowa State, told Waldman, "What it takes to grow food with less pollution isn’t a mystery. . . .But the solution threatens the status quo. You can’t sell as much fertilizer, hybrid seeds or animal feed. For those companies, the solution is the problem.”