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LakeQuality
C

Weyers Lake

Manitowoc County, WisconsinEutrophic

Weyers Lake earns a C — middle-of-the-pack water quality, with one or two parameters dragging the average down from a stronger grade. High phosphorus is the leading drag on the score — likely from upland agriculture, lawn runoff, or in-lake sediment release.

A TSI in the eutrophic range signals a lake doing what nutrient-loaded waters do — supporting an active algal community at the cost of clear water. The lake bottoms out at 32 ft — a moderate depth that supports a warm-water fishery without the year-round cold refuge a deeper basin provides. The lake is compact at 6 acres, with partial shoreline records and little volume to buffer nutrient inputs. Weyers Lake ranks 17 of 18 in Manitowoc County — at the lower end of the locally monitored distribution.

No invasive species are currently listed at Weyers Lake — the lake remains off the Wisconsin infested-waters roster. The fishery is bass-led, with 2 documented species across the lake's records. Public access is available — the lake is on the Wisconsin DNR public-access list. Monitoring depth is thin here: the LakeGrade rubric is applied to a small number of sample years, and the grade will be revised as more data accumulates.

Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2024-08-20. Grade methodology: LakeGrade methodology.

Swimming Safety

Generally safe for swimming, moderate water quality

Water Quality Grade: C, Fair

Crystal clear, you can see 21.3 ft down. Phosphorus level: 92.3 µg/L. Trophic State Index: 51.

MetricValueGrade
Water Clarity (Secchi Depth)21.3 ftA
Phosphorus92.3 µg/LF
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)51Eutrophic

High nutrients, frequent algae, reduced clarity

Lake Details

CharacteristicValue
Maximum Depth32 ft
Surface Area6 acres
Public AccessYes

Fish Species

Click a species to see all Wisconsin and Minnesota lakes where it is found.

→ Best fishing times for Weyers Lake (14-day solunar calendar)

→ Is it safe to eat fish from Weyers Lake? (mercury & PFAS guide)

Weyers Lake fishing regulations (limits, seasons, special rules)

Water Quality Trend: Improving

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

MetricTrendChange/YearYears
Water Clarity Stable-0.089 m/yr7
Phosphorus Improving-9.15 µg/L/yr6

Recreation & Access

1
Boat Landings
Yes
Public Access

Location

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County Ranking

Ranked #17 of 18 lakes in Manitowoc County

Nearby Lakes in Manitowoc County

Eutrophic Lakes in Wisconsin

WI DNR Lake Profile

Authoritative data from the Wisconsin DNR LakePages. 1 station on file (most recent sample 2024).

DNR Assessment
Good · Small lake
Trophic State Index 52 (eutrophic) · 5-year average

Fish Species (DNR-rated)

Panfish(Common)Largemouth Bass(Common)

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Fish and recreation data from Wisconsin DNR Lakes

Most recent sample: 2024-08-20

Monitoring stations: 1