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Nine Eagles Lake
view of nine eagles lake in the summer
Water Quality Improvement Plans

Iowa's streams, lakes and rivers need improvement. But where do we start?

Water quality improvement plans investigate streams and lakes on Iowa's impaired waters list. The ultimate goal is to improve water quality and remove streams and lakes from the impaired list. The plans, developed by the DNR, use research results and the public's input to help reduce the amount of pollutants reaching our water.

Water quality improvement plans identify and locate water quality problems in a stream or lake, and suggest ways that communities can improve their stream or lake to meet Iowa's water quality standards.

Schedule of future improvement plans

Final plans


DNR Contact

Jeff Berckes
Water Quality Improvement Plan (TMDL) Program Coordinator


About Water Quality Improvement Plans

Attention: in response to novel coronavirus and covid-19, departmental policy on employee travel and public meetings has been recently updated. In the interest of protecting the health of our employees and citizens that we serve, all public meetings involving tmdls will be replaced by video presentations accompanied by public comment periods until further notice.

A public meeting for an addendum to the Briggs Woods Lake tmdl is open for public review and comment until January 19, 2021. The original Briggs Woods Lake final tmdl is available in our tmdl document library.

A public meeting for the Hickory Grove Lake tmdl is open for public review and comment until February 15, 2021.

Please submit all public comments to:

jeff.berckes@dnr.iowa.gov (preferred)


Jeff Berckes c/o Iowa DNR
Wallace State Office Building
502 E 9th St.
Des Moines, IA 50319