How Clean Is Gull Lake?
Gull 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): 11 ft. Phosphorus: 11.1 µg/L. Trophic State Index: 41.
Cleanliness Snapshot
| Metric | Gull Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | NR | B |
| Water Clarity (Secchi) | 11 ft | — |
| Phosphorus | 11.1 µg/L | <30 = clean |
| Trophic State Index | 41 | <50 = clean |
How does Gull Lake compare?
Gull Lake is not rated for water quality — its monitoring record does not meet the evidence bar, so it is not compared with the Wisconsin state average. Multi-year monitoring data shows water quality is improving based on 2 years of records.