How Clean Is Big Carnelian Lake?
Big Carnelian Lake is a clean lake by Minnesota standards. It received a water quality grade of B (Good) based on EPA monitoring data. Water clarity (Secchi depth): 14.5 ft. Trophic State Index: 39.
Cleanliness Snapshot
| Metric | Big Carnelian Lake | Minnesota avg |
|---|---|---|
| Overall Grade | B | C |
| Water Clarity (Secchi) | 14.5 ft | — |
| Trophic State Index | 39 | <50 = clean |
How does Big Carnelian Lake compare?
Big Carnelian Lake's grade of B matches or beats the Minnesota state average of C. It ranks #7 of 31 lakes in Washington County by water quality score. Multi-year monitoring data shows water quality is stable based on 5 years of records.