Latest EPA assessment shows almost no improvement in river and stream nitrogen pollution

abcnews.go.com:

The EPA’s newest assessment of water quality and nutrient pollution in U.S. rivers and streams shows almost no progress on cutting the nitrogen pollution that comes primarily from farm chemical runoff

ST. LOUIS — The nation’s rivers and streams remain stubbornly polluted with nutrients that contaminate drinking water and fuel a gigantic dead zone for aquatic life in the Gulf of Mexico, according to a recently released Environmental Protection Agency assessment.

It’s a difficult problem that's concentrated in agricultural regions that drain into the Mississippi River. More than half of the basin’s miles of rivers and streams were in poor condition for nitrogen and phosphorus from fertilizer that drains into waterways, the agency found. For decades, federal and state officials have struggled to control farm runoff, the biggest source of nutrient pollution that is not typically federally regulated.

It’s a problem only expected to get harder to control as climate change produces more intense storms that dump rain on the Midwest and South. Those heavy rains flood farm fields, pick up commercial fertilizers and carry them into nearby rivers.

“It’s really worrying that we are clearly not meeting the goals that we’ve set for ourselves,” said Olivia Dorothy, director of river restoration with the conservation group American Rivers.

The assessment is based on samples collected in 2018 and 2019 and it allows experts to compare river conditions from previous rounds of sampling, although different sampling sites were used. It takes years for the agency to compile the results and release the report, which is the most comprehensive assessment of the nation’s river and stream health. Phosphorus levels dipped slightly while nitrogen