Alimagnet Lake
Dakota County, Minnesota104 acresView mapDirections
Minnesota PCA publishes the water-quality measurements for Alimagnet Lake. Here is what has been measured.
- Eutrophic
- Eurasian watermilfoil
- 12 ft max depth
- Limited data
Alimagnet Lake in Dakota County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 5 ft visibility. Phosphorus: 71 µg/L. Chlorophyll-a (algae): 58 µg/L. Maximum depth: 11.5 ft. Surface area: 103.59 acres.
Alimagnet Lake is a 104-acre productive, nutrient-rich eutrophic lake in Dakota County, Minnesota with a maximum depth of 12 feet. Limited fish-species data available. No public access — the lake is private or restricted. Compared to the 44 other monitored lakes in Dakota County, Alimagnet Lake ranks #43 for water quality.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2025-10-19. Methodology: how these readings are compared.
What Alimagnet Lake is good for
From access and monitoring records, not editorial picks.
- Ice seasonIce-out around Apr 5
Swimming conditions
Readings onlyLimited data
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Alimagnet Lake is safe to swim in today is a call for the Minnesota Pollution Control Agency and the Minnesota DNR and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Alimagnet Lake
These are the measurements Minnesota PCA publishes for Alimagnet Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 5 ft. Phosphorus 71 µg/L. Chlorophyll-a 58 µg/L. TSI 63.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 5ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 71µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | 58µg/L | Poor GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 63 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Alimagnet Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Alimagnet Lake typically sits around 58°F at the surface in October. Summer average is about 78°F. Usually warmest in Jul (about 84°F) and coldest in Apr (about 47°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (47°F) to its warmest (84°F).
Typical surface water temperature by month, from 45 field readings (2010–2025) via the EPA Water Quality Portal. See the full Alimagnet Lake water temperature breakdown →
Lake Details
Max depth
11.5 ft
Surface area
104 acres
Shoreline
3.4 mi
Littoral zone
100%
Share shallower than 15 ft
Public access
No
Listed by Minnesota PCA
Lake Size & Watershed
Watershed (drainage) area
1 sq mi
HydroLAKES / HydroSHEDS
Elevation
958 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Stays via Stay22
Stays near Alimagnet Lake
Compare lakeside cabins, hotels, and vacation rentals near Alimagnet Lake in Dakota 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. The water-quality readings cover nutrients and algae, not lodging. Cabins and rentals around Alimagnet Lake are listed below.
Top-rated places to stay near Alimagnet Lake
Prices for Oct 9–11, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Minnesota’s top lakes →
Follow Alimagnet Lake’s readings
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Fishing Alimagnet 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 readings over time
2 seasons of samples on record (2024–2025). Calling a direction takes at least 4 years of the same measurement.
Water clarity
Stable2 years
Ice season
Typical ice-out
Apr 5
Earliest Mar 8, 2000 · Latest Apr 26, 1975
Typical ice-in
Nov 22
Earliest Nov 1, 1991 · Latest Dec 21, 1998
Most recent ice-out
Apr 20
2008
70 observations · Minnesota PCA ice records
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Alimagnet Lake under Clean Water Act (NPDES) discharge permits.
- Minnegasco Energy Dist SystemBurnsville · 2.5 mi away · NPDES MN0063649
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
Nearby Lakes in Dakota County
Frequently asked questions about Alimagnet Lake
Where is Alimagnet Lake?
- Alimagnet Lake is a lake in Dakota County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Alimagnet Lake?
- Alimagnet Lake in Dakota County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 5 ft visibility. Phosphorus: 71 µg/L. Chlorophyll-a (algae): 58 µg/L. Maximum depth: 11.5 ft. Surface area: 103.59 acres.
Is Alimagnet Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Alimagnet Lake?
- Alimagnet Lake typically sits around 58°F at the surface in October, from 45 EPA Water Quality Portal field readings (2010–2025). That is a typical value for the month, not a live reading.
How deep is Alimagnet Lake?
- Alimagnet Lake has a maximum depth of 11.5 feet. The lake covers 103.59 acres.
When does Alimagnet Lake thaw?
- Alimagnet Lake typically has ice-out around Apr 5. Ice typically forms around Nov 22. The open water season is approximately 231 days.
Can I fish at Alimagnet Lake?
- Public access to Alimagnet Lake is listed as no on the lake record, so confirm before you make the trip. Seasons, size and bag limits, and whether you need a license are set by Minnesota's fish and wildlife agency, so check its current regulations before you go.
Explore Alimagnet Lake across LakeQuality
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Fish species and best lakes in Dakota County
Species activity outlook by water temperature and season
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Minnesota's cleanest lakes, ranked on agency measurements
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Where this data comes from
56 measurements from 2 monitoring stations, 2024–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA56 samples · 2024–2025
Analytical methods
- Field measurement/observation, generic method
- Phosphorus by Colorimetry
- Analysis of Chlorophyll in Periphyton and Plankton
Monitoring station identifiers (2)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Lake size & watershed from HydroLAKES (HydroSHEDS)
Lake details from Minnesota DNR LakeFinder
Ice data from Minnesota DNR Climate