How Clean Is Middle Cullen Lake?
Middle Cullen 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): 13.5 ft. Phosphorus: 13 µg/L. Trophic State Index: 40.
Cleanliness Snapshot
| Metric | Middle Cullen Lake | Minnesota avg |
|---|---|---|
| Overall Grade | A | C |
| Water Clarity (Secchi) | 13.5 ft | — |
| Phosphorus | 13 µg/L | <30 = clean |
| Trophic State Index | 40 | <50 = clean |
How does Middle Cullen Lake compare?
Middle Cullen Lake's grade of A matches or beats the Minnesota state average of C. It ranks #68 of 120 lakes in Crow Wing County by water quality score. Multi-year monitoring data shows water quality is improving based on 5 years of records.