Legion Lake
Legion Lake in Alger County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 7.4 ft visibility. Maximum depth: 35 ft. Surface area: 35.9 acres.
- Clarity
- 7.4 ft
- Max depth
- 35 ft
- Area
- 36 acres
- Trend
- ↓ Declining
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Why Legion Lake has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Legion Lake, the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity. Sampling here has recorded water clarity, but not phosphorus and algae (chlorophyll-a).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by EGLE and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
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. Grade methodology: LakeQuality methodology.
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Legion Lake
These readings exist but are not enough for an A–F grade — see why.
Moderate clarity, visible to about 7.4 ft. Trophic State Index: 48.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 7.4 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 48 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Legion Lake
Compare lakeside cabins, hotels, and vacation rentals near Legion Lake in Alger County, Michigan — 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 Legion Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 35 ft |
| Surface Area | 36 acres |
Fishing Legion Lake
Water Quality Trend: ↓ Declining
Based on 9 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | +0.038 m/yr | 9 |
| Phosphorus | ↓ Declining | +2.28 µg/L/yr | 8 |
Graded lakes near Legion Lake
Legion Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Alger County
Frequently asked questions about Legion Lake
Where is Legion Lake?
- Legion Lake is a lake in Alger County, Michigan. LakeQuality has not rated this lake (UNRATED) — there is not enough recent sampling to assign a letter.
What is the water quality grade for Legion Lake?
- Legion Lake in Alger County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 7.4 ft visibility. Maximum depth: 35 ft. Surface area: 35.9 acres.
Is Legion Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Legion Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
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)
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.