How Clean Is High Island Lake?
High Island Lake has very poor water quality and a high algae bloom risk. It received a water quality grade of F (Very Poor) based on EPA monitoring data. Water clarity (Secchi depth): 2.1 ft. Phosphorus: 180 µg/L. Trophic State Index: 73.
Cleanliness Snapshot
| Metric | High Island Lake | Minnesota avg |
|---|---|---|
| Overall Grade | F | C |
| Water Clarity (Secchi) | 2.1 ft | — |
| Phosphorus | 180 µg/L | <30 = clean |
| Trophic State Index | 73 | <50 = clean |
How does High Island Lake compare?
High Island Lake's grade of F falls below the Minnesota state average of C. It ranks #2 of 2 lakes in Sibley County by water quality score.