How Clean Is Topaz Lake?
Topaz Lake is among the cleanest lakes in Minnesota. It received a water quality grade of A (Excellent) based on EPA monitoring data. Water clarity (Secchi depth): 17.5 ft. Trophic State Index: 36.
Cleanliness Snapshot
| Metric | Topaz Lake | Minnesota avg |
|---|---|---|
| Overall Grade | A | C |
| Water Clarity (Secchi) | 17.5 ft | — |
| Trophic State Index | 36 | <50 = clean |
How does Topaz Lake compare?
Topaz Lake's grade of A matches or beats the Minnesota state average of C. It ranks #19 of 142 lakes in Lake County by water quality score. Multi-year monitoring data shows water quality is declining based on 4 years of records.