Cleanest Lakes in St. Croix County, Wisconsin
Bass Lake in St. Croix County leads the rankings with a water quality grade of A and 10 ft of clarity. Below are the top 5 cleanest monitored lakes in St. Croix County, Wisconsin, ranked by EPA water quality score.
Ranked List
| # | Lake | County | Grade | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|---|
| 1 | Bass Lake | St. Croix | A | 10 ft | 14 µg/L | - |
| 2 | Lake St. Croix | St. Croix | B | 5.6 ft | 16.5 µg/L | - |
| 3 | Bass Lake Pump Site | St. Croix | C | - | 14.5 µg/L | - |
| 4 | Lake Mallalieu | St. Croix | D | 2.8 ft | 54.4 µg/L | - |
| 5 | Apple Lake | St. Croix | D | 2.5 ft | 84.9 µg/L | - |