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. With clarity and phosphorus scored, the sub-grades cluster within a letter of each other, pointing to stable conditions rather than 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.
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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 & Introduced Species
Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.
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
Cleaner Lakes Within 30 Miles
Amelia Lake holds Grade C. 2 nearby lakes hold higher grades.
- BOtter LakeRamsey County · mi · Higher grade (C → B)
- CBlack LakeRamsey County · mi · Higher overall water quality score
Nearby Lakes in Anoka County
More Minnesota Lake Rankings
State Parks Near Amelia Lake
Other Grade C Lakes in Minnesota
Eutrophic Lakes in Minnesota
EPA Impairment Status
Amelia Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MN02-0003-00 · Official waterbody report · Matched by proximity (1.56 km)
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-09-25
Monitoring stations: 1