Fish and Aquatic Life
Pewaukee Lake, in the Upper Fox River - Illinois Watershed, is a 2,437.16 acre lake that falls in Waukesha County. This lake is managed for fishing and swimming and is currently not considered impaired.
Author Aquatic Biologist
A large elongated lake created by moraine blocking of a preglacial erosion valley (Juday, 1914) causing impoundment and reversal of drainage. Nearly half the present acreage is the result of impoundment by an artificial dam of six-foot head on the outlet stream, Pewaukee River. The east end is very shallow and was marsh prior to impoundment. There are three small contributing streams in addition to springs supplying water. The fishery consists of northern pike, pan fish, largemouth bass and walleyes. The lake has enjoyed a reputation for excellent fishing for many years. The water is generally cloudy or turbid due to algae in suspension. Weeds and algae are major-use problems and great quantities of chemicals are applied annually for treatment. Public access is afforded by several road ends, a city park beach, and an unimproved county park area currently being developed. Well over a thousand homes border the lake, many without sewage disposal. They contribute indirectly to the fertility level and are partially the cause of vegetation problems. The lake community provides little cover for nesting waterfowl, however it is used extensively by migrating ducks as a resting area. In 1941, it was suggested that a waterfowl refuge be created on the west end.
Source: 1963, Surface Water Resources of Waukesha County Pewaukee Lake T7N, R18, 19E Surface Acres = 2,359, S.D.F. = 2.01, Maximum Depth = 45 feet.
Author Surface Water Inventory Of Wisconsin
Pewaukee Lake (772000) was assessed during the 2016 listing cycle; total phosphorus and chlorophyll sample data were clearly below 2016 WisCALM listing thresholds for the Recreation use and Fish and Aquatic Life use. This water is meeting these designated uses and is not considered impaired.
Author Ashley Beranek
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.
Aquatic Invasive Species Removal
LAKE PEWAUKEE SANITARY DISTRICT: ACQ-Lake Pewaukee SD Property Acquisition
The Pewaukee Lake Sanitary District (PLSD) will use this grant to pay for part of the purchase of the Ogden property, located in the Town of Pewaukee. The parcel is 56 acres, including 50 acres of wetland and 6 acres of upland.
Aquatic Invasive Species Removal
LAKE PEWAUKEE SANITARY DISTRICT: ACQ-Land Acquisition for Property
The Pewaukee Lake Sanitary District (PLSD) will use this grant to pay for the recent purchase of the Gluth property, located in the City of Pewaukee. The parcel is 30.67acres, including 26 acres of wetland and 4.67acres of upland woods and prairie. The parcel is primarily located in the shoreland zone of Pewaukee Lake.
The Waukesha County Park and Planning Commission will acquire 86.6 acres of land for lake protection. The preservation of this parcel for open space and passive park use.
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|
|772000||Pewaukee Lake||10017954||Pewaukee Lake -- Access at Naga-Waukee Park - W End Of Lk||10/24/2003||8/17/2019||Map||Data|
|772000||Pewaukee Lake||10031490||Pewaukee Lake -- Village Launch (off Park Ave.)||5/1/2010||9/13/2012||Map||Data|
|772000||Pewaukee Lake||10007173||Pewaukee Lake - T7 R18E S13||9/1/1966||9/18/2019||Map||Data|
|772000||Pewaukee Lake||10033632||Pewaukee Lake - East Basin||4/29/2011||9/5/2019||Map||Data|
|772000||Pewaukee Lake||171||Pewaukee Lake - Pewaukee Lake||Map||Data|
|772000||Pewaukee Lake||10041745||Pewaukee Lake near deepest point||7/16/1992||9/28/2019||Map||Data|
|772000||Pewaukee Lake||683143||Pewaukee Lake - Deep Hole||9/18/1973||9/28/2019||Map||Data|
|772000||Pewaukee Lake||683151||Pewaukee Lake - Oakton Beach And Tennis Club Stp||Map||Data|
|772000||Pewaukee Lake||10017955||Pewaukee Lake -- Access Off Cty SS Nr Edgewater Dr||5/27/2011||9/17/2011||Map||Data|
|772000||Pewaukee Lake||10007812||Pewaukee Lake - Auer Bay||6/1/1967||6/1/1967||Map||Data|
|772000||Pewaukee Lake||10017895||Pewaukee Lake -- Access at End Of Lakeview Blvd Nr Cth Ss||5/10/2007||8/17/2019||Map||Data|
|772000||Pewaukee Lake||10031489||Pewaukee Lake -- Beach at Lakefront Park||Map||Data|
Pewaukee Lake is located in the Upper Fox River - Illinois watershed which is 151.08 mi². Land use in the watershed is primarily suburban (35.10%), wetland (17%) and a mix of urban (14.20%) and other uses (33.70%). This watershed has 218.00 stream miles, 2,907.45 lake acres and 12,048.42 wetland acres.
Nonpoint Source Characteristics
This watershed is ranked Not Available for runoff impacts on streams, Not Available 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.