Cleanest Lakes in Leeds and Grenville Counties County, Ontario
Crosby Lake in Leeds and Grenville Counties County leads the rankings with a water quality grade of A and 17.1 ft of clarity. Below are the 32 cleanest monitored lakes in Leeds and Grenville Counties County, Ontario, ranked by EPA water quality score.
Ranked List
| # | Lake | County | Grade | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|---|
| 1 | Crosby Lake | Leeds and Grenville Counties | A | 17.1 ft | 9.9 µg/L | - |
| 2 | Bass Lake | Leeds and Grenville Counties | A | 19.4 ft | 13.9 µg/L | - |
| 3 | Bass Lake | Leeds and Grenville Counties | A | 19 ft | 6.3 µg/L | - |
| 4 | Big Rideau Lake | Leeds and Grenville Counties | A | 18.9 ft | 9.7 µg/L | - |
| 5 | Charleston Lake | Leeds and Grenville Counties | A | 19.7 ft | 9.6 µg/L | - |
| 6 | Higley Lake | Leeds and Grenville Counties | A | 15.4 ft | 11.2 µg/L | - |
| 7 | Indian Lake | Leeds and Grenville Counties | A | 15.7 ft | 12.6 µg/L | - |
| 8 | Otter Lake | Leeds and Grenville Counties | A | 14.9 ft | 9.3 µg/L | - |
| 9 | Sand Lake | Leeds and Grenville Counties | A | 16.4 ft | 13.6 µg/L | - |
| 10 | St Lawrence River Lake | Leeds and Grenville Counties | A | 31.2 ft | 10.1 µg/L | - |
| 11 | Benson Lake | Leeds and Grenville Counties | A | 10.2 ft | 14.1 µg/L | - |
| 12 | Clear Lake | Leeds and Grenville Counties | A | 14.6 ft | 13.9 µg/L | - |
| 13 | Gananoque Lake | Leeds and Grenville Counties | A | 10.5 ft | 19.5 µg/L | - |
| 14 | Gananoque River Lake | Leeds and Grenville Counties | A | 10.5 ft | 17.5 µg/L | - |
| 15 | Grippen Lake | Leeds and Grenville Counties | A | 13.1 ft | 11.8 µg/L | - |
| 16 | Long Lake | Leeds and Grenville Counties | A | 10.2 ft | 13.7 µg/L | - |
| 17 | Newboro Lake | Leeds and Grenville Counties | A | 14.8 ft | 17 µg/L | - |
| 18 | Red Horse Lake | Leeds and Grenville Counties | A | 13.1 ft | 17.6 µg/L | - |
| 19 | Tommy Lake | Leeds and Grenville Counties | A | 11.6 ft | 19.5 µg/L | - |
| 20 | Whitefish Lake | Leeds and Grenville Counties | A | 12.1 ft | 14.7 µg/L | - |
| 21 | Graham Lake | Leeds and Grenville Counties | B | 8.2 ft | 13 µg/L | - |
| 22 | Little Crosby Lake | Leeds and Grenville Counties | B | 9.5 ft | 9.4 µg/L | - |
| 23 | Lower Beverley Lake | Leeds and Grenville Counties | B | 9.8 ft | 18.8 µg/L | - |
| 24 | Singleton Lake | Leeds and Grenville Counties | B | 8.9 ft | 18.5 µg/L | - |
| 25 | Upper Beverley Lake | Leeds and Grenville Counties | B | 8.5 ft | 18.3 µg/L | - |
| 26 | Upper Rideau Lake | Leeds and Grenville Counties | B | 12.5 ft | 20 µg/L | - |
| 27 | Killenbeck Lake | Leeds and Grenville Counties | B | 7.9 ft | 21.8 µg/L | - |
| 28 | Lyndhurst Lake | Leeds and Grenville Counties | B | 9.8 ft | 24.7 µg/L | - |
| 29 | Temperance Lake | Leeds and Grenville Counties | B | 5.9 ft | 17.9 µg/L | - |
| 30 | Little Cranberry Lake | Leeds and Grenville Counties | C | 8.2 ft | 44.7 µg/L | - |
| 31 | South Lake | Leeds and Grenville Counties | C | 4.9 ft | 26.1 µg/L | - |
| 32 | Troy Lake | Leeds and Grenville Counties | C | 5.6 ft | 24 µg/L | - |