How Clean Is Lone Lake?
Lone Lake does not have enough monitoring data to grade. Its EPA monitoring record does not meet the evidence bar for a letter grade, so it is published unrated — that is an absence of evidence, not a poor result. The measurements below are what the record does contain. Water clarity (Secchi depth): 22.5 ft. Trophic State Index: 32.
Cleanliness Snapshot
| Metric | Lone Lake | Minnesota avg |
|---|---|---|
| Overall Grade | C | |
| Water Clarity (Secchi) | 22.5 ft | — |
| Trophic State Index | 32 | <50 = clean |
How does Lone Lake compare?
Lone Lake is not rated for water quality — its monitoring record does not meet the evidence bar, so it is not compared with the Minnesota state average. Multi-year monitoring data shows water quality is stable based on 6 years of records.