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Low: Mpca Co-Located Site Muskeg Bay Lake

Lake of the Woods County, MinnesotaMesotrophic

On the LakeGrade rubric, Low: Mpca Co-Located Site Muskeg Bay Lake pulls an A: clarity at 17.7 ft and 28 µg/L of phosphorus put it in the top bracket for Minnesota. Sub-grades cluster within a single letter of each other, which usually means the lake is in stable trophic balance rather than fighting one specific stressor.

The lake sits in the mesotrophic zone — the band where most well-managed Minnesota lakes fall. 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. Within Lake of the Woods County's 11 graded waters, Low: Mpca Co-Located Site Muskeg Bay Lake sits at rank 2, near the top of the local distribution.

Low: Mpca Co-Located Site Muskeg Bay Lake is on the Minnesota infested-waters list for zebra mussels — boaters should follow clean-drain-dry protocols when moving gear to or from the lake. The state fisheries records do not list documented species for Low: Mpca Co-Located Site Muskeg Bay Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. Public access is available — the lake is on the Minnesota PCA public-access list. 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, Minnesota DNR LakeFinder, last sampled 2024-10-24. 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 17.7 ft down. Phosphorus level: 28 µg/L. Trophic State Index: 44.

MetricValueGrade
Water Clarity (Secchi Depth)17.7 ftA
Phosphorus28 µg/LB
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)44Mesotrophic

Moderate nutrients, good water quality

Invasive Species

spiny waterfleazebra mussel

Water Quality Trend: Improving

Based on 2 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Improving+2.25 m/yr2
Phosphorus Improving-2 µg/L/yr2

Ice Season

Historical ice data from Minnesota DNR (6 observations).

Typical Ice-Out
May 5
EarliestLatest
Ice-Out1976-04-26 (1976)1996-05-19 (1996)
Ice-In1986-11-11 (1986)1988-11-17 (1988)

Most recent ice-out: 1997-05-06

Location

Loading map…

County Ranking

Ranked #2 of 11 lakes in Lake of the Woods County

Nearby Lakes in Lake of the Woods County

DNR Reports & Resources

Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Low: Mpca Co-Located Site Muskeg Bay Lake. 1 report on file.

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Ice data from Minnesota DNR Climate

Most recent sample: 2024-10-24

Monitoring stations: 1