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LakeQuality
C

Amelia Lake

Anoka County, MinnesotaEutrophic

Amelia Lake earns a C — middle-of-the-pack water quality, with one or two parameters dragging the average down from a stronger grade. 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.

At a TSI of 57, Amelia Lake reads as eutrophic — nutrient-rich enough that summer algal growth and reduced clarity are expected, not unusual. 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. Amelia Lake sits at rank 13 of 24 in Anoka County, in the lower half of the local distribution.

An invasive species record — flowering rush — has been logged at Amelia Lake; Minnesota PCA maintains the official infested-waters list. The state fisheries records do not list documented species for Amelia Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. No formal public access is documented at Amelia Lake — most use is by shoreline residents and their guests. 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 2024-09-25. Grade methodology: LakeGrade methodology.

Swimming Safety

Generally safe for swimming, moderate water quality

Water Quality Grade: C, Fair

Murky, only visible to about 3.9 ft. Phosphorus level: 37 µg/L. Trophic State Index: 57.

MetricValueGrade
Water Clarity (Secchi Depth)3.9 ftD
Phosphorus37 µg/LC
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)57Eutrophic

High nutrients, frequent algae, reduced clarity

Invasive Species

flowering rush

Water Quality Trend: Improving

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

MetricTrendChange/YearYears
Water Clarity Improving+0.681 m/yr5
Phosphorus Improving-1.05 µg/L/yr5

Location

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County Ranking

Ranked #13 of 24 lakes in Anoka County

Nearby Lakes in Anoka County

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Most recent sample: 2024-09-25

Monitoring stations: 1