How Clean Is Frances Lake?
Frances Lake has fair water quality — typical of lakes with moderate nutrient enrichment. It received a water quality grade of C (Fair) based on EPA monitoring data. Water clarity (Secchi depth): 6 ft. Phosphorus: 25 µg/L. Trophic State Index: 51.
Cleanliness Snapshot
| Metric | Frances Lake | Minnesota avg |
|---|---|---|
| Overall Grade | C | C |
| Water Clarity (Secchi) | 6 ft | — |
| Phosphorus | 25 µg/L | <30 = clean |
| Trophic State Index | 51 | <50 = clean |
How does Frances Lake compare?
Frances Lake's grade of C matches or beats the Minnesota state average of C. It ranks #3 of 14 lakes in Le Sueur County by water quality score. Multi-year monitoring data shows water quality is stable based on 5 years of records.