Bad Medicine Lake vs Maud Lake
Water quality, depth, fish species, and recreation comparison.
Bad Medicine Lake and Maud Lake read the same on nutrients and algae. Both are in Becker County, Minnesota.
Bad Medicine Lake and Maud Lake are both in Minnesota — a same-state head-to-head where the comparison comes down to lake-specific differences in depth, watershed, and monitoring history rather than the broader state-level water-quality regime. The readings are close: Bad Medicine Lake and Maud Lake sit within a narrow band of each other on phosphorus, chlorophyll-a and clarity. The per-parameter table below shows where the small differences actually live.
With readings this close, the choice between the two lakes turns on non-water-quality factors: depth, fish species, public access, distance from home. The per-lake pages below cover all of those.
Bad Medicine Lake
Crystal clear, you can see 25 ft down.
Maud Lake
Crystal clear, you can see 17 ft down.
Side-by-Side Metrics
| Metric | Bad Medicine Lake | Maud Lake |
|---|---|---|
| Water Clarity | 25 ft Better | 17 ft |
| Phosphorus | 6 µg/L Better | 10 µg/L |
| Chlorophyll-a (Algae) | 1.6 µg/L Better | 2.7 µg/L |
| Maximum Depth | 84 ft Better | 32 ft |
| Surface Area | 803 acres | 517 acres |
| Public Access | Yes | Yes |
| Fish Species | 13 | 15 Better |
| Trophic State | oligotrophic | oligotrophic |
A green ✓ marks the better value for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better). Surface area and trophic state carry no tick — a bigger lake is not a better lake.
Swap a lake
Compare Bad Medicine Lake or Maud Lake against a different lake.
Verdict
Both lakes earn the same Grade A. The tiebreakers come down to clarity (Bad Medicine Lake: 25 ft, Maud Lake: 17 ft) and what you want from the lake. Bad Medicine Lake has fewer fish species than Maud Lake.
Source: EPA National Aquatic Resource Surveys, 2026.