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LakeQuality
A

Lakeshore State Park-Milwaukee

Milwaukee County, WisconsinLimited DataOligotrophic

Lakeshore State Park-Milwaukee earns an A — water clarity, phosphorus, and chlorophyll-a all rate among the best monitored waters in Milwaukee County. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

A TSI value of 31 puts Lakeshore State Park-Milwaukee in the oligotrophic range, where biological productivity stays low and the water column remains clear. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. The lake's surface area is not consistently recorded across state datasets — physical context remains partial. Lakeshore State Park-Milwaukee ranks 1 of 15 in Milwaukee County, putting it in the upper tier of locally monitored lakes.

No invasive species are currently listed at Lakeshore State Park-Milwaukee — the lake remains off the Wisconsin infested-waters roster. The state fisheries records do not list documented species for Lakeshore State Park-Milwaukee, which usually reflects a lack of formal fisheries survey work rather than an empty lake. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.

Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2019-10-07. Grade methodology: LakeGrade methodology.

Swimming Safety

Excellent for swimming, crystal clear water with minimal algae

Water Quality Grade: A, Excellent

Crystal clear, you can see 24.6 ft down. Trophic State Index: 31.

MetricValueGrade
Water Clarity (Secchi Depth)24.6 ftA
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)31Oligotrophic

Low nutrients, clear water, excellent for swimming

Water Quality Trend: Declining

Based on 7 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Declining-0.111 m/yr7
Chlorophyll-a Declining+6.95 µg/L/yr6
See year-by-year chart →

Location

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County Ranking

Ranked #1 of 15 lakes in Milwaukee County

Nearby Lakes in Milwaukee County

State Parks Near Lakeshore State Park-Milwaukee

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Most recent sample: 2019-10-07

Monitoring stations: 1