NONPOINT SOURCE SUCCESS STORY

Wyoming Department of Environmental Quality  | view as a webpage

Wyoming Department of Environmental Quality

NONPOINT SOURCE SUCCESS STORY

Over 36 miles of the North Platte River have been removed from the 303(d) list of impaired waterbodies due to locally-led watershed restoration efforts and voluntary irrigation practices.

Irrigation of cropland overlying cretaceous shale formations contributes to high selenium concentrations in the North Platte River near the city of Casper. In 1998, the Wyoming Department of Environmental Quality (WDEQ) added a 36.8-mile segment of the river to the Clean Water Act section 303(d) list due to aquatic life, coldwater fisheries, and wildlife designated uses being impaired by selenium. Voluntary restoration efforts led by Natrona County Conservation District in cooperation with many partners have reduced selenium loading to the river from irrigated cropland activities. The segment of the North Platte River now meets the selenium water quality criterion, and WDEQ has removed it from the impaired waters list in the 2016/2018 305(b)/303(d) Integrated Report.

For the complete success story, please click here.