How Clean Is Lower Cullen Lake?
Lower 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): 17.4 ft. Phosphorus: 14.5 µg/L. Chlorophyll-a (algae): 2.7 µg/L. Trophic State Index: 40.
Cleanliness Snapshot
| Metric | Lower Cullen Lake | Minnesota avg |
|---|---|---|
| Overall Grade | A | C |
| Water Clarity (Secchi) | 17.4 ft | — |
| Phosphorus | 14.5 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 2.7 µg/L | <10 = clean |
| Trophic State Index | 40 | <50 = clean |
How does Lower Cullen Lake compare?
Lower Cullen Lake's grade of A matches or beats the Minnesota state average of C. It ranks #58 of 85 lakes in Crow Wing County by water quality score. Multi-year monitoring data shows water quality is declining based on 6 years of records.
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