Shawano County, Wisconsin
WR09
299200
89.70
Condition has remained stable; water is not impaired.
Notes
Grass Lake was evaluated every two years between 2014 and 2024; chloride, phosphorus, aquatic plants, and algae data indicated a healthy system. This lake is on the Waters Attaining Standards List.Pollutant
Mercury
Listed For
Impairments
NA
Current Use
Listing Status
Water Delisted
Attainable Use
Priority
Delisted 2010
Designated Use
303(d) ID
87 (in part)
Listing Date
4/1/1998
Impaired Water Notes
Delist in 2010 Hg FCA based on Largemouth Bass 2006 data (8 samples). This waterbody has data after the methodology changed for fish consumption advice. This waterbody has enough fish tissue samples to remove these waters from the 303(d) list as a FCA, although they will still all be covered under the state's general advisory for fish consumption. The post-2000 data confirms that these sites do not need advice more stringent that the statewide general advice.
Date
10/8/2009