Island Lake
Aitkin County, Minnesota244 acresView mapDirections
Minnesota PCA publishes the water-quality measurements for Island Lake. Here is what has been measured.
- 25 ft max depth
- Limited data
Island Lake in Aitkin County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 7 ft visibility. Maximum depth: 25 ft. Surface area: 243.67 acres.
Island Lake is a 244-acre lake in Aitkin County, Minnesota with a maximum depth of 25 feet. The lake supports 11 documented fish species including black bullhead, black crappie, and bluegill. No public access — the lake is private or restricted.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2025-09-12. Methodology: how these readings are compared.
What Island Lake is good for
From access and monitoring records, not editorial picks.
- Fishing11 species recorded
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Island 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 Island Lake
These are the measurements Minnesota PCA publishes for Island Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Moderate clarity, visible to about 7 ft. TSI 49.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 7ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 49 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Island Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Island Lake typically sits around 75°F at the surface in August. Summer average is about 73°F. Usually warmest in Aug (about 75°F) and coldest in May (about 61°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (61°F) to its warmest (75°F).
Typical surface water temperature by month, from 9 field readings (2025–2025) via the EPA Water Quality Portal. See the full Island Lake water temperature breakdown →
Lake Details
Max depth
25 ft
Surface area
244 acres
Shoreline
4.8 mi
Littoral zone
80%
Share shallower than 15 ft
Public access
No
Listed by Minnesota PCA
Lake Size & Watershed
Watershed (drainage) area
2 sq mi
HydroLAKES / HydroSHEDS
Elevation
1,230 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Stays via Stay22
Stays near Island Lake
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Top-rated places to stay near Island Lake
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Fish Species
Click a species to see every lake where it is documented.
Fishing Island Lake
Nearby Lakes in Aitkin County
Frequently asked questions about Island Lake
Where is Island Lake?
- Island Lake is a lake in Aitkin County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Island Lake?
- Island Lake in Aitkin County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 7 ft visibility. Maximum depth: 25 ft. Surface area: 243.67 acres.
Is Island 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 Island Lake?
- Island Lake typically sits around 75°F at the surface in August, from 9 EPA Water Quality Portal field readings (2025–2025). That is a typical value for the month, not a live reading.
How deep is Island Lake?
- Island Lake has a maximum depth of 25 feet. The lake covers 243.67 acres.
What fish are in Island Lake?
- Fish species found in Island Lake include black bullhead, black crappie, bluegill, bowfin (dogfish), brown bullhead, hybrid sunfish, largemouth bass, northern pike, pumpkinseed, yellow bullhead, yellow perch. Island Lake is located in Aitkin County, Minnesota.
Can I fish at Island Lake?
- Public access to Island 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.
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Where this data comes from
9 measurements from 1 monitoring station, 2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA9 samples · 2025
Analytical methods
- Field measurement/observation, generic method
Monitoring station identifiers (1)
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
Lake size & watershed from HydroLAKES (HydroSHEDS)
Lake details from Minnesota DNR LakeFinder