Legion Lake
Alger County, Michigan36 acresView mapDirections
EGLE publishes the water-quality measurements for Legion Lake. Here is what has been measured.
- 35 ft max depth
- Limited data
Legion Lake in Alger County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 7.4 ft visibility. Maximum depth: 35 ft. Surface area: 35.9 acres.
Legion Lake is a 36-acre lake in Alger County, Michigan with a maximum depth of 35 feet. Overall water quality is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2018-08-21. Methodology: how these readings are compared.
What Legion Lake is good for
From access and monitoring records, not editorial picks.
- Deep water35 ft surveyed max depth
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Legion Lake is safe to swim in today is a call for the Michigan Department of Environment, Great Lakes, and Energy (EGLE) and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Legion Lake
These are the measurements EGLE publishes for Legion 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 7.4 ft. TSI 48.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 7.4ft | 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. | 48 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Legion Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
35 ft
Surface area
36 acres
Stays via Stay22
Stays near Legion Lake
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Fishing Legion Lake
Water Quality Trend: Worsening
Based on 9 years of monitoring (2016–2024).
Water clarity
Stable9 years
Phosphorus
Worsening+2.28 µg/L/yr8 years
Nearby Lakes in Alger County
Frequently asked questions about Legion Lake
Where is Legion Lake?
- Legion Lake is a lake in Alger County, Michigan. Its water-quality measurements are published by EGLE and shown on this page as reported.
What is the water quality of Legion Lake?
- Legion Lake in Alger County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 7.4 ft visibility. Maximum depth: 35 ft. Surface area: 35.9 acres.
Is Legion Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Legion Lake?
- Legion Lake has a maximum depth of 35 feet. The lake covers 35.9 acres.
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Where this data comes from
6 measurements from 1 monitoring station, 2017–2018. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- North American Lake Management Society
NALMS6 samples · 2017–2018
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.