(Radio Iowa) – Rainfall in the spring and early summer briefly relieved drought in the Corn Belt but it also contributed to elevated nitrate concentrations in many of the region’s waterways. During dry years, nitrates from soil microbes and farm fertilizers can accumulate in fields until it rains and a lot of it flushes into rivers, lakes and sources of drinking water. America’s Watershed Initiative executive director Kim Lutz works across 31 states.

Steve Kalkhoff is a hydrologist with the U-S Geological Survey, which collects a lot of this data.

Lutz says this pollution is a problem for habitats in and around affected waterways… and it’s hurting industries like fishing and tourism. It’s also costing communities a lot of money to treat drinking water. But Lutz says new federal funding and conservation practices like cover crops can help.