Pollution of aquifers from agricultural runoff is a major and growing problem in agricultural areas across the midwest, nowhere more acutely than in Iowa, as Keith Schneider’s deep dive piece shows, below.
If only there was something farmers could do to continue making a good living on their land without having to apply huge amounts of nitrates and pesticides…oh, wait….(see David Mulla and others, above)

Keith Schneider in The New Lede:

Faced with a startlingly high cancer rate in the key US farm state of Iowa, public health leaders are taking the politically precarious step of acknowledging that preventing disease necessitates cutting exposure to potentially cancer-causing chemicals, including those used in agriculture.

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Iowa now ranks second to Kentucky in cancer incidence in the United States, and from 2015 to 2019 was the only state where the rate of new cancers increased, according to the National Cancer Institute. Rates of oral cancer, leukemia, non-Hodgkin lymphoma, melanoma, kidney, colon, and breast cancer are among the nation’s highest, according to Charlton.

The state is expected to see 21,000 new cases of cancer this year alone, more than double the number of new cancers recorded for 1973, the year Iowa began keeping records, according to Charlton. Since 1973, the state population has grown only a little over 10%.

“Some cancers in Iowa are rising and others are not falling as quickly as they are in other states,” said Charlton. “We do know that Iowans have a number of environmental exposures that could contribute to our risk of cancer.”

Exposure to nitrate in drinking water is well-recognized by scientists as a risk factor in many of the same high-incidence cancers seen in Iowa – lymphoma, breast cancer, blood, and colon cancer.

Cancer researchers, including a group from the University of Iowa, have linked various cancers to long-term exposure in air and water to trace levels of insecticides and herbicides, as well as nitrates. And Iowa farmers annually spread more pesticides (nearly 54 million pounds) more commercial fertilizer (2 billion pounds) and more animal manure (50 million tons) than in any other state, according to the US Department of Agriculture (USDA) and Iowa State University.