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.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.9 ft | D |
| Phosphorus | 37 µg/L | C |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 57 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Invasive Species
Water Quality Trend: ↑ Improving
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.681 m/yr | 5 |
| Phosphorus | ↑ Improving | -1.05 µg/L/yr | 5 |
Location
County Ranking
Ranked #13 of 24 lakes in Anoka County
Nearby Lakes in Anoka County
More Minnesota Lake Rankings
State Parks Near Amelia Lake
Other Grade C Lakes in Minnesota
Eutrophic Lakes in Minnesota
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