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B

English Lake

Manitowoc County, WisconsinMesotrophic

On the LakeGrade scale English Lake grades a B, with clarity at 7.5 ft and 27 µg/L of phosphorus placing it above the Wisconsin median. The two scored sub-grades — clarity and phosphorus — track close together, so neither one is dragging the average down.

A TSI near 50 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 9, 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.

Reviewed by LakeQuality Editorial Team · Updated

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Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Moderate clarity, visible to about 7.5 ft. Phosphorus level: 26.7 µg/L. Trophic State Index: 50.

MetricValueGrade
Water Clarity (Secchi Depth)7.5 ftC
Phosphorus26.7 µg/LB
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)50Mesotrophic

Moderate nutrients, good water quality

Water Quality Trend: Declining

Based on 6 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Declining-0.459 m/yr6
Phosphorus Stable-0.17 µg/L/yr6
See year-by-year chart →

Location

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County Ranking

Ranked #9 of 18 lakes in Manitowoc County

Cleaner Lakes Within 30 Miles

English Lake holds Grade B. 2 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Manitowoc County

EPA Impairment Status

English Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).

Causes of impairment

Nutrients (phosphorus, nitrogen)

A Total Maximum Daily Load (TMDL) plan has been approved.

Source: EPA ATTAINS assessment unit WI10000141 · Official waterbody report

Data Sources

Water quality data from the EPA Water Quality Portal

Impairment status from EPA ATTAINS 303(d) database

Grading methodology based on Metropolitan Council standards

Most recent sample: 2025-08-27

Monitoring stations: 1