How Clean Is Lake Jefferson?
Lake Jefferson does not have enough monitoring data to grade. It does not have enough recent summer sampling for a letter grade, so it is shown unrated. Unrated means the measurements are missing, not that the water is poor. Everything the monitoring record does contain is below. Water clarity (Secchi depth): 4 ft. Trophic State Index: 57.
Cleanliness Snapshot
| Metric | Lake Jefferson | Minnesota avg |
|---|---|---|
| Overall Grade | NR | C |
| Water Clarity (Secchi) | 4 ft | — |
| Trophic State Index | 57 | <50 = clean |
How does Lake Jefferson compare?
Lake Jefferson is not rated for water quality: it does not have enough recent summer sampling for a letter grade, so it is not compared with the Minnesota state average. Multi-year monitoring data shows water quality is improving based on 6 years of records.
Watch Lake Jefferson water quality
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