Alger County Lake Quality
Michigan, 10 lakes, average grade B (Good)
Only 10 lakes in Alger County carry an active grade. The county-level summary is therefore representative of those specific lakes, not necessarily of every water body in the county. The county-wide average lands at B — solid water quality with most lakes carrying clear summer transparency and low-to-moderate phosphorus.
The county's lakes lean shallow, which makes the grades sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest lake on the books is Tie Lake (A); the most-stressed is Legion Lake (B).
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Quick Answers for Alger County
Planning a trip? Check special fishing regulations for Tie Lake — or check the official Michigan fishing regulations.
Fishing in Alger County
All Lakes in Alger County
10 lakes · 7 graded, 3 not rated7 graded lakes · 3 not rated, hidden
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Max Depth | Access |
|---|---|---|---|---|---|---|---|---|
| 1 | ATie LakeAlger | A | 13.5 ft | 8 µg/L | 4.9 µg/L | No recent samples | 25 ft | ✓ Public |
| 2 | BLegion LakeAlger | B | 9.1 ft | 17 µg/L | No recent samples | No recent samples | 35 ft | Not recorded |
| 3 | BMiners LakeAlger | B | 6.3 ft | 15.7 µg/L | No recent samples | No recent samples | 15 ft | Not recorded |
| 4 | BChapel LakeAlger | B | 7.9 ft | 18.1 µg/L | No recent samples | No recent samples | No recent samples | Not recorded |
| 5 | BGrand Sable LakeAlger | B | 8 ft | 10.8 µg/L | No recent samples | No recent samples | 85 ft | ✓ Public |
| 6 | BBeaver LakeAlger | B | 14.5 ft | 7.8 µg/L | No recent samples | No recent samples | 39 ft | Not recorded |
| 7 | BTrapper'S LakeAlger | B | 7.7 ft | 7.8 µg/L | No recent samples | No recent samples | No recent samples | Not recorded |
| NRDeer LakeAlger | NR | 6.5 ft | No recent samples | No recent samples | No recent samples | 70 ft | Not recorded | |
| NRLittle Beaver LakeAlger | NR | 6.2 ft | No recent samples | No recent samples | No recent samples | 30 ft | Not recorded | |
| NRLegion LakeAlger | NR | 7.4 ft | No recent samples | No recent samples | No recent samples | 35 ft | Not recorded |
NR = not rated: there is not enough recent sampling to support a letter. That is EPA Integrated Reporting Category 3 (insufficient information), not a failing grade. How grading works.
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Other Counties in Michigan
See how Alger County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 49 states and 2 Canadian provinces.
Source: EPA National Aquatic Resource Surveys, 2026.