Farms, more productive than ever, are poisoning drinking water in rural America
One in seven Americans drink from private wells, according to the U.S. Geological Survey. Nitrate concentrations rose significantly in 21% of regions where USGS researchers tested groundwater from 2002 through 2012, compared with the 13 prior years. … “The worst-kept secret is how vulnerable private wells are to agricultural runoff,” says David Cwiertny, director of the University of Iowa’s Center for Health Effects of Environmental Contamination.