B
Rock County Lake Quality
Wisconsin — 16 lakes, average grade B (Good)
All Lakes in Rock County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Island Lake - | A | 7.5m | 15.4 µg/L |
| 2 | Clear Lake - | A | 13.5m | 12.2 µg/L |
| 3 | Big Falls Flowage - Deep Hole Lake | A | 4.75m | — |
| 4 | Sand Lake - | A | 13.25m | — |
| 5 | Mccann Lake - | A | 5.13m | — |
| 6 | Island Lake - West | A | 6.5m | — |
| 7 | Potato Lake - So Basin - | A | 6.85m | — |
| 8 | Thornapple Flowage - Deep Hole Lake | A | 5.5m | — |
| 9 | Pulaski Lake - | A | 9.75m | — |
| 10 | Chain Lake - | A | 5m | — |
| 11 | Amacoy Lake - | B | 4.5m | 25.3 µg/L |
| 12 | Unnamed Rusk Co -Deep Hole Lake | B | 5.66m | 30.5 µg/L |
| 13 | Two Bear Lake - | B | — | 22 µg/L |
| 14 | Potato Lake - North Basin- Deepest Spot | C | 2.45m | — |
| 15 | Murphy Flowage - Deep Hole Lake | C | — | 33.4 µg/L |
| 16 | Dairyland Reservoir - | D | 1.38m | — |