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LakeQuality
C

Ramsey Lake

Wright County, MinnesotaEutrophic

The LakeGrade rubric puts Ramsey Lake at a C: clarity at 4.6 ft, 39 µg/L of phosphorus, and a TSI of 56 signal an intermediate trophic state. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

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'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. Ramsey Lake sits at rank 33 of 64 in Wright County, in the lower half of the local distribution.

Ramsey Lake carries an invasive watermilfoil record — boat-launch decontamination and shoreline care matter more here than at uninfested lakes. The state fisheries records do not list documented species for Ramsey 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. 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, Minnesota DNR LakeFinder, last sampled 2024-09-16. Grade methodology: LakeGrade methodology.

Swimming Safety

Generally safe for swimming, moderate water quality

Water Quality Grade: C, Fair

Murky, only visible to about 4.6 ft. Phosphorus level: 39 µg/L. Trophic State Index: 56.

MetricValueGrade
Water Clarity (Secchi Depth)4.6 ftD
Phosphorus39 µg/LC
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)56Eutrophic

High nutrients, frequent algae, reduced clarity

Invasive Species

Eurasian watermilfoil

Water Quality Trend: Declining

Based on 5 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Declining-0.14 m/yr5
Phosphorus Declining+2.95 µg/L/yr5

Location

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County Ranking

Ranked #33 of 64 lakes in Wright County

Nearby Lakes in Wright County

State Parks Near Ramsey Lake

DNR Reports & Resources

Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Ramsey Lake. 1 report on file.

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Most recent sample: 2024-09-16

Monitoring stations: 1