The Environmental Protection Agency has cited six beef feedlot operations in Kansas, Iowa and Nebraska for violating the federal Clean Water Act.

Jewell County Feeders of Mankato, Kan., was fined $10,800, and Platte Valley Feeders of Kearney, Neb., was fined $20,000 for not complying with federal discharge laws aimed at protecting area waterways.

The EPA also ordered four other feedlots to end unauthorized release of pollutants. Those feedlots are identified as Sandhill Farm, Inc., of Rock Valley Iowa; Kooima Custom Feed, of Rock Valley, Iowa; Albert Rens, Ireton, Iowa; Darwin Rus, also of Rock Valley, Iowa.

The EPA said in a release Monday that runoff from concentrated animal feeding operations carries several pollutants, including heavy metals, hormones and antibiotics.

Copyright 2010 The Associated Press.