Cleanest Lakes in Thunder Bay District County, Ontario
Arrow Lake in Thunder Bay District County leads the rankings with a water quality grade of A and 24 ft of clarity. Below are the 50 cleanest monitored lakes in Thunder Bay District County, Ontario, ranked by EPA water quality score.
Ranked List
| # | Lake | County | Grade | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|---|
| 1 | Arrow Lake | Thunder Bay District | A | 24 ft | 7.5 µg/L | - |
| 2 | Deception Lake | Thunder Bay District | A | 20.2 ft | 5.8 µg/L | - |
| 3 | Oliver Lake | Thunder Bay District | A | 19 ft | 5.2 µg/L | - |
| 4 | Silver Lake | Thunder Bay District | A | 16.1 ft | 5.1 µg/L | - |
| 5 | Sunset Lake | Thunder Bay District | A | 15.6 ft | 7.9 µg/L | - |
| 6 | Whitesand Lake | Thunder Bay District | A | 15.1 ft | 5.6 µg/L | - |
| 7 | Arnott Lake | Thunder Bay District | A | 23 ft | 14.3 µg/L | - |
| 8 | Bamoos Lake | Thunder Bay District | A | 16.4 ft | 12.3 µg/L | - |
| 9 | Burchell L. Lake | Thunder Bay District | A | 20.7 ft | 3.2 µg/L | - |
| 10 | Castle L. Lake | Thunder Bay District | A | 16.7 ft | 6.3 µg/L | - |
| 11 | Cry L. Lake | Thunder Bay District | A | 24.3 ft | 4.2 µg/L | - |
| 12 | Empire Lake | Thunder Bay District | A | 20.8 ft | 12.2 µg/L | - |
| 13 | Greenwater Lake | Thunder Bay District | A | 47.9 ft | 1.8 µg/L | - |
| 14 | Greenwater L. Lake | Thunder Bay District | A | 15.4 ft | 6.1 µg/L | - |
| 15 | Grouse L. Lake | Thunder Bay District | A | 15.1 ft | 6.3 µg/L | - |
| 16 | Little Moraine Lake | Thunder Bay District | A | 22.6 ft | 9.6 µg/L | - |
| 17 | Magone Lake | Thunder Bay District | A | 26.2 ft | 12.7 µg/L | - |
| 18 | Minchin Lake | Thunder Bay District | A | 15.7 ft | 6.2 µg/L | - |
| 19 | Mishi Lake | Thunder Bay District | A | 18 ft | 3.9 µg/L | - |
| 20 | Pagwachuan Lake | Thunder Bay District | A | 15.4 ft | 6.8 µg/L | - |
| 21 | Pringle Lake | Thunder Bay District | A | 17.6 ft | 5.1 µg/L | - |
| 22 | Squeers Lake | Thunder Bay District | A | 19.7 ft | 11.4 µg/L | - |
| 23 | Unknown Lake | Thunder Bay District | A | 19.7 ft | 5.8 µg/L | - |
| 24 | Walotka L. Lake | Thunder Bay District | A | 16.4 ft | 5.4 µg/L | - |
| 25 | Waweig L. Lake | Thunder Bay District | A | 19 ft | 5.9 µg/L | - |
| 26 | Wig Lake | Thunder Bay District | A | 14.9 ft | 9 µg/L | - |
| 27 | Bass Lake | Thunder Bay District | A | 11.8 ft | 8.3 µg/L | - |
| 28 | Greenwater Lake | Thunder Bay District | A | 12.6 ft | 13 µg/L | - |
| 29 | Icarus Lake | Thunder Bay District | A | 11.8 ft | 9.2 µg/L | - |
| 30 | Island Lake | Thunder Bay District | A | 12.6 ft | 8.2 µg/L | - |
| 31 | Shebandowan Lake | Thunder Bay District | A | 10.8 ft | 9.3 µg/L | - |
| 32 | Superior Lake | Thunder Bay District | A | 10.8 ft | 5.2 µg/L | - |
| 33 | White Lake | Thunder Bay District | A | 11.2 ft | 8.2 µg/L | - |
| 34 | Windigoostigwan Lake | Thunder Bay District | A | 11.5 ft | 5.6 µg/L | - |
| 35 | Arrow L. Lake | Thunder Bay District | A | 12.8 ft | 6.1 µg/L | - |
| 36 | Athelstane L. Lake | Thunder Bay District | A | 10.5 ft | 8.5 µg/L | - |
| 37 | Atik L. Lake | Thunder Bay District | A | 12.1 ft | 8.3 µg/L | - |
| 38 | Barbara Lake | Thunder Bay District | A | 10.8 ft | 3.5 µg/L | - |
| 39 | Beatty L. Lake | Thunder Bay District | A | 13.5 ft | 9.7 µg/L | - |
| 40 | Bisect Lake | Thunder Bay District | A | 11.5 ft | 6.4 µg/L | - |
| 41 | Camel Read Lake | Thunder Bay District | A | 13.1 ft | 4.8 µg/L | - |
| 42 | Cliff Lake | Thunder Bay District | A | 14.8 ft | 5.5 µg/L | - |
| 43 | Crevasse Lake | Thunder Bay District | A | 13.8 ft | 6.9 µg/L | - |
| 44 | De Lesseps Lake | Thunder Bay District | A | 11.5 ft | 4.5 µg/L | - |
| 45 | Disraeli Lake | Thunder Bay District | A | 13.1 ft | 7.4 µg/L | - |
| 46 | Eileen Lake | Thunder Bay District | A | 14.8 ft | 11.1 µg/L | - |
| 47 | Fallingsnow L. Lake | Thunder Bay District | A | 12.8 ft | 5.3 µg/L | - |
| 48 | Fernow Lake | Thunder Bay District | A | 13.1 ft | 9.1 µg/L | - |
| 49 | Frazer L. Lake | Thunder Bay District | A | 10.5 ft | 7.4 µg/L | - |
| 50 | Hilma Lake | Thunder Bay District | A | 10.5 ft | 11.2 µg/L | - |