Chippewa River - Unionized Ammonia: TMDL Project

Minnesota's Impaired Waters and TMDLs


The lower 11.2-mile segment of the Chippewa River, from Dry Weather Creek to its confluence with the Minnesota River near Montevideo, was listed as impaired due to elevated concentrations of un-ionized ammonia. The TMDL report was approved by the EPA on October 29, 2004. The impaired segment of the Chippewa River was delisted in 2006 due to reductions in un-ionized ammonia from the Montevideo waste water treatment plant.

Map and location

The Chippewa River is located in the Minnesota River Basin.

For a map of this delisted segment of the Chippewa River, see the Map of Approved TMDLs in Minnesota.

TMDL report and implementation plan

TMDL report approved by EPA on October 29, 2004.

Other documents



Information contact

Joe Hauger
Minnesota Pollution Control Agency
1420 East College Drive
Marshall, MN 56258