Indian School Lake
Sawyer County, WisconsinLimited DataEutrophic
Indian School Lake carries a solid B grade — strong on most parameters, with measurements that hold up well across the summer season.
Eutrophic conditions are the baseline here: clarity drops noticeably in late summer, and dissolved oxygen near the bottom can become a concern. A maximum depth of just 6 ft means sediment-bound phosphorus releases back into the water column whenever wind stirs the bottom — a classic shallow-lake dynamic. At 65 acres, Indian School Lake sits below the Wisconsin median: a small water where shoreline activity has an outsized effect on water quality. Indian School Lake sits at rank 33 of 50 in Sawyer County, in the lower half of the local distribution.
No invasive species are currently listed at Indian School Lake — the lake remains off the Wisconsin infested-waters roster. Bass fishing is part of the appeal: the species list runs to 3, anchored by largemouth and/or smallmouth bass. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2022-09-12. Grade methodology: LakeGrade methodology.
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Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
No clarity data. Phosphorus level: 24.1 µg/L. Trophic State Index: 50.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | 24.1 µg/L | B |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 50 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 6 ft |
| Surface Area | 65 acres |
Fish Species
Click a species to see all Wisconsin and Minnesota lakes where it is found.
→ Best fishing times for Indian School Lake (14-day solunar calendar)
→ Is it safe to eat fish from Indian School Lake? (mercury & PFAS guide)
→ Indian School Lake fishing regulations (limits, seasons, special rules)
Location
County Ranking
Ranked #33 of 50 lakes in Sawyer County
Cleaner Lakes Within 30 Miles
Indian School Lake holds Grade B. 5 nearby lakes hold higher grades.
Nearby Lakes in Sawyer County
More Wisconsin Lake Rankings
Other Grade B Lakes in Wisconsin
Eutrophic Lakes in Wisconsin
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. 2 stations on file (most recent sample 2022).
Fish Species (DNR-rated)
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2022-09-12
Monitoring stations: 1