How Clean Is Lake Tomah?
Lake Tomah has very poor water quality and a high algae bloom risk. It received a water quality grade of F (Very Poor) based on EPA monitoring data. Phosphorus: 140 µg/L. Trophic State Index: 75.
Cleanliness Snapshot
| Metric | Lake Tomah | Wisconsin avg |
|---|---|---|
| Overall Grade | F | C |
| Phosphorus | 140 µg/L | <30 = clean |
| Trophic State Index | 75 | <50 = clean |
How does Lake Tomah compare?
Lake Tomah's grade of F falls below the Wisconsin state average of C. It ranks #1 of 1 lakes in Monroe County by water quality score. Multi-year monitoring data shows water quality is improving based on 4 years of records.