Fish and Aquatic Life
The most notable lake from a wildlife standpoint is Grass Lake, which is essentially a northern bog lake
in a southern setting, surrounded by farmland. Vegetation includes various orchid species, calla lilies,
buck bean and a variety of other bog plants. It is the only bog of its type in Calumet County. Some of the
birds seen on Grass Lake include sandhill crane, with at least one nesting pair per year, double crested
cormorant, great blue heron, nesting green heron, woodcock and snipe. The area is a significant nesting
area for many species of ducks and Canada geese. Black terns have been seen on both Round lake and
Grass lake. WDNR lacks sufficient data to make further recommendations for Grass Lake. Monitoring
would provide basic trophic state information so that management decisions can be made to enhance lake
Author Aquatic Biologist
Wisconsin has over 84,000 miles of streams, 15,000 lakes and milllions of acres of wetlands. Assessing the condition of this vast amount of water is challenging. The state's water monitoring program uses a media-based, cross-program approach to analyze water condition. An updated monitoring strategy (2015-2020) is now available. Compliance with Clean Water Act fishable, swimmable standards are located in the Executive Summary of Water Condition in 2018. See also the 'monitoring and projects' tab.
Wisconsin's Water Quality Standards provide qualitative and quantitative goals for waters that are protective of Fishable, Swimmable conditions [Learn more]. Waters that do not meet water quality standards are considered impaired and restoration actions are planned and carried out until the water is once again fishable and swimmable
Management goals can include creation or implementation of a Total Maximum Daily Load analysis, a Nine Key Element Plan, or other restoration work, education and outreach and more. If specific recommendations exist for this water, they will be displayed below online.
Monitoring the condition of a river, stream, or lake includes gathering physical, chemical, biological, and habitat data. Comprehensive studies often gather all these parameters in great detail, while lighter assessment events will involve sampling physical, chemical and biological data such as macroinvertebrates. Aquatic macroinvertebrates and fish communities integrate watershed or catchment condition, providing great insight into overall ecosystem health. Chemical and habitat parameters tell researchers more about human induced problems including contaminated runoff, point source dischargers, or habitat issues that foster or limit the potential of aquatic communities to thrive in a given area. Wisconsin's Water Monitoring Strategy was recenty updated.
Grants and Management Projects
|WBIC||Official Waterbody Name||Station ID||Station Name||Earliest Fieldwork Date||Latest Fieldwork Date||View Station||View Data|
|77200||Grass Lake||10001967||Grass Lake||9/8/2000||6/16/2013||Map||Data|
Grass Lake is located in the North Branch Manitowoc River watershed which is 76.97 mi². Land use in the watershed is primarily agricultural (61.80%), grassland (16%) and a mix of wetland (14.60%) and other uses (7.50%). This watershed has 129.77 stream miles, 292.80 lake acres and 7,389.45 wetland acres.
Nonpoint Source Characteristics
This watershed is ranked Not Ranked for runoff impacts on streams, High for runoff impacts on lakes and High for runoff impacts on groundwater and therefore has an overall rank of High. This value can be used in ranking the watershed or individual waterbodies for grant funding under state and county programs.However, all waters are affected by diffuse pollutant sources regardless of initial water quality. Applications for specific runoff projects under state or county grant programs may be pursued. For more information, go to surface water program grants.