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LakeQuality
A

English Lake

Manitowoc County, WisconsinMesotrophic

English Lake earns an A — water clarity, phosphorus, and chlorophyll-a all rate among the best monitored waters in Manitowoc County. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

A TSI near 41 places English Lake in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. 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. Among the 18 graded lakes in Manitowoc County, English Lake sits at rank 7, above the county median.

No invasive species are currently listed at English Lake — the lake remains off the Wisconsin infested-waters roster. The state fisheries records do not list documented species for English Lake, 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 2025-08-27. 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. Phosphorus level: 26.7 µg/L. Trophic State Index: 41.

MetricValueGrade
Water Clarity (Secchi Depth)24.6 ftA
Phosphorus26.7 µg/LB
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)41Mesotrophic

Moderate nutrients, good water quality

Water Quality Trend: Declining

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

MetricTrendChange/YearYears
Water Clarity Declining-0.187 m/yr7
Phosphorus Stable-0.17 µg/L/yr6

Location

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County Ranking

Ranked #7 of 18 lakes in Manitowoc County

Nearby Lakes in Manitowoc County

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Most recent sample: 2025-08-27

Monitoring stations: 2