How Clean Is Spider Lake?
Spider Lake is a clean lake by Wisconsin standards. It received a water quality grade of B (Good) based on EPA monitoring data. Water clarity (Secchi depth): 10.5 ft. Phosphorus: 14.1 µg/L. Trophic State Index: 43.
Cleanliness Snapshot
| Metric | Spider Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | B | B |
| Water Clarity (Secchi) | 10.5 ft | — |
| Phosphorus | 14.1 µg/L | <30 = clean |
| Trophic State Index | 43 | <50 = clean |
How does Spider Lake compare?
Spider Lake's grade of B matches or beats the Wisconsin state average of B. It ranks #15 of 45 lakes in Sawyer County by water quality score. Multi-year monitoring data shows water quality is improving based on 7 years of records.