Lakes With Algae Problems in Wisconsin
5 lakes in Wisconsin report elevated algae levels (chlorophyll-a above 20 µg/L). These lakes are most likely to develop blue-green algae blooms during warm, calm summer weather. Avoid swimming during visible blooms and rinse pets after contact.
Ranked List
| # | Lake | County | Grade | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|---|
| 1 | Milwaukee Harbor South Half Lake | Milwaukee | D | 7.4 ft | - | 31 µg/L |
| 2 | Milwaukee Harbor Lake | Milwaukee | C | 7.5 ft | - | 26 µg/L |
| 3 | Milwaukee Harbor North Half Lake | Milwaukee | C | 7.2 ft | - | 26 µg/L |
| 4 | Milwaukee Harbor Lake | Milwaukee | D | 6.6 ft | - | 23 µg/L |
| 5 | Big Round Lake | Polk | C | 5.6 ft | 27.6 µg/L | 21 µg/L |