Amelia Lake
Amelia Lake in Anoka County, Minnesota has a water quality grade of C (Fair). Water clarity: 3.9 ft visibility. Phosphorus: 36.5 µg/L. Chlorophyll-a (algae): 6 µg/L.
- Clarity
- 3.9 ft
- Typical in August
- 73°F
- Mean depth
- ~11 ft est.
- Type
- Eutrophic
- Trend
- ↑ Improving
- Public access
- No
Next lake in Anoka County
Amelia Lake is a productive, nutrient-rich eutrophic lake in Anoka County, Minnesota with an estimated average depth of about 11 feet. Water quality is graded C based on 2 sampling years through 2025. Overall water quality is improving over recent sampling years. Limited fish-species data available. No public access — the lake is private or restricted. Compared to the 22 other monitored lakes in Anoka County, Amelia Lake ranks #12 for water quality.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2025-09-24. Grade methodology: LakeGrade methodology.
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Swimming Safety
Grade onlyModerate
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Generally safe for swimming, moderate water quality
Water Quality Grade: C (Fair)
Murky, only visible to about 3.9 ft. Phosphorus level: 36.5 µg/L. Chlorophyll-a: 6 µg/L. Trophic State Index: 54.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.9 ft | Not graded |
| Phosphorus | 36.5 µg/L | Fair |
| Chlorophyll-a (Algae) | 6 µg/L | Good |
| Trophic State Index (TSI) | 54 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Amelia Lake
Compare lakeside cabins, hotels, and vacation rentals near Amelia Lake in Anoka County, Minnesota — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Amelia Lake
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Water Temperature
Amelia Lake typically sits around 73°F at the surface in August. Summer average is about 74°F. Usually warmest in Jul (about 78°F) and coldest in May (about 61°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 37 field readings (2010–2022) via the EPA Water Quality Portal. See the full Amelia Lake water temperature breakdown →
Lake Details
| Characteristic | Value |
|---|---|
| Average Depth | ~11 ft est. |
| Public Access | No |
Depth marked “est.” is a modeled estimate from HydroLAKES, not a measured survey. Minnesota has not published bathymetry for Amelia Lake.
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Fishing Amelia Lake
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 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.381 m/yr | 6 |
| Phosphorus | ↑ Improving | -1.3 µg/L/yr | 6 |
| Chlorophyll-a | ↑ Improving | -0.41 µg/L/yr | 6 |
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)
County Ranking
Ranked #12 of 23 lakes in Anoka County
Nearby Lakes With Higher Grades
Amelia Lake holds Grade C. One nearby lake has a higher nutrient-and-algae grade — useful for a swim day, not a reason to skip lodging here.
See full comparison →Nearby Lakes in Anoka County
Frequently asked questions about Amelia Lake
What is the water quality grade for Amelia Lake?
- Amelia Lake in Anoka County, Minnesota has a water quality grade of C (Fair). Water clarity: 3.9 ft visibility. Phosphorus: 36.5 µg/L. Chlorophyll-a (algae): 6 µg/L.
Is Amelia Lake safe to swim in?
- Generally safe for swimming, moderate water quality. Amelia Lake has a water quality grade of C (Fair). Algae concentration (chlorophyll-a) is 6 µg/L. Always check local health department advisories before swimming.
What is the water temperature of Amelia Lake?
- Amelia Lake typically sits around 73°F at the surface in August, from 37 EPA Water Quality Portal field readings (2010–2022). That is a typical value for the month, not a live reading.
How deep is Amelia Lake?
- No published bathymetric survey covers Amelia Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 11 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Explore Amelia Lake across LakeGrade
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Where this data comes from
132 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA132 samples · 2020–2025
Analytical methods
- Field measurement/observation, generic method
- Phosphorus by Two Reagent Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)
Lake details from Minnesota DNR LakeFinder