EPA: More than half of U.S. rivers unsuitable for aquatic life

700_4db3c05301743d8c2ba4a1ff446d6c20Fifty-five percent of U.S. river and stream lengths were in poor condition for aquatic life, largely under threat from runoff contaminated by fertilizers, the U.S. Environmental Protection Agency said on Tuesday.

High levels of phosphorus and nitrogen, runoff from urban areas, shrinking ground cover and pollution from mercury and bacteria were putting the 1.2 million miles of streams and rivers surveyed under stress, the EPA said.

“This new science shows that America’s streams and rivers are under significant pressure,” Nancy Stone, acting administrator of the EPA’s Office of Water, said in a statement.

( via usnews.nbcnews.com )