B
Algoma District County Lake Quality
Ontario, 217 lakes, average grade B (Good)
Algoma District County in Ontario carries 217 graded lakes — one of the lake-richer counties in our dataset. Coverage that dense usually reflects active lake-association sampling alongside state-agency monitoring. With an average grade of B, Algoma District County sits comfortably above the Ontario median.
Most of the county's monitored lakes are shallow — under 50 feet — which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed. Arnott Lake (A) is the cleanest in the county.
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Quick Answers for Algoma District County
Cleanest lakes in Algoma District County →Cleanest lakes in Ontario →Safest swimming lakes in Ontario →
Planning a trip? Check special fishing regulations for Arnott Lake — or check the official Ontario fishing regulations.
All Lakes in Algoma District County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Arnott Lake | A | 24 ft | 4.6 µg/L |
| 2 | Basswood Lake | A | 37.7 ft | 2.8 µg/L |
| 3 | Bearhead Lake | A | 17.1 ft | - |
| 4 | Big Skunk Lake | A | 15.7 ft | 5.7 µg/L |
| 5 | Chiblow Lake | A | 19.4 ft | 3.5 µg/L |
| 6 | Cloudy Lake | A | 19.4 ft | 4.2 µg/L |
| 7 | Corine Lake | A | 18 ft | 4.5 µg/L |
| 8 | Cummings Lake | A | 16.7 ft | 3.9 µg/L |
| 9 | Deil Lake | A | 17.6 ft | 3.6 µg/L |
| 10 | Dunlop Lake | A | 22.8 ft | 3.4 µg/L |
| 11 | Emerald Lake | A | 18.4 ft | 4.8 µg/L |
| 12 | Hagen Lake | A | 16.4 ft | 6.7 µg/L |
| 13 | Lauzon Lake | A | 23.3 ft | 3.5 µg/L |
| 14 | Little Basswood Lake | A | 16.4 ft | 6.7 µg/L |
| 15 | Little Chiblow Lake | A | 15.7 ft | 4.4 µg/L |
| 16 | Matinenda Lake | A | 23 ft | 4.1 µg/L |
| 17 | Mccarroll Lake | A | 24.3 ft | 3.5 µg/L |
| 18 | Meredith Lake | A | 23 ft | 4 µg/L |
| 19 | Northland Lake | A | 15.4 ft | 4.6 µg/L |
| 20 | Quirke Lake | A | 30.2 ft | 4.5 µg/L |
| 21 | Skookum Lake | A | - | 5.4 µg/L |
| 22 | Alces Lake | A | - | 8.3 µg/L |
| 23 | Bear Lake | A | - | 8 µg/L |
| 24 | Blackfish Lake | A | - | 9.2 µg/L |
| 25 | Burns Lake | A | - | 3.2 µg/L |
| 26 | Canyon Lake | A | - | 7.9 µg/L |
| 27 | Darragh Lake | A | - | 5.9 µg/L |
| 28 | Daystar Lake | A | - | 6.7 µg/L |
| 29 | Dubbelewe Lake | A | - | 6.9 µg/L |
| 30 | East Caribou Lake | A | - | 5.2 µg/L |
| 31 | Fern Lake | A | - | 4.9 µg/L |
| 32 | Flack Lake | A | - | 5 µg/L |
| 33 | Folson Lake | A | - | 8 µg/L |
| 34 | Goetz Lake | A | - | 4.3 µg/L |
| 35 | Heron Lake | A | - | 13.6 µg/L |
| 36 | Jeanne Lake | A | - | 7.9 µg/L |
| 37 | Keelor Lake | A | - | 8.1 µg/L |
| 38 | Kindiogami Lake | A | - | 6.7 µg/L |
| 39 | Klondyke Lakes | A | - | 6.7 µg/L |
| 40 | Lawer Lake | A | - | 9.5 µg/L |
| 41 | Little Lake | A | - | 8.7 µg/L |
| 42 | Little Sister Lake | A | - | 7.3 µg/L |
| 43 | Lodestone Lake | A | - | 5.8 µg/L |
| 44 | Lonely Lake | A | - | 3.5 µg/L |
| 45 | Mamainse Lake | A | - | 3.8 µg/L |
| 46 | Mccabe Lake | A | - | 4.3 µg/L |
| 47 | Millen Lake | A | - | 6.3 µg/L |
| 48 | Morrison Lake | A | - | 4.6 µg/L |
| 49 | Pivot Lake | A | - | 4.3 µg/L |
| 50 | Ranger Lake | A | 25.3 ft | 3 µg/L |
| 51 | Rangers Lake | A | - | 6 µg/L |
| 52 | Rosemarie Lake | A | - | 9.5 µg/L |
| 53 | Rufus Lake | A | - | 14.8 µg/L |
| 54 | Ryan Lake | A | - | 16.4 µg/L |
| 55 | Scarfe Lake | A | - | 5.2 µg/L |
| 56 | Seymour Lake | A | - | 7.9 µg/L |
| 57 | Shakwa Lake | A | - | 6.7 µg/L |
| 58 | Sinaminda Lake | A | - | 6.9 µg/L |
| 59 | Ten Mile Lake | A | - | 4.7 µg/L |
| 60 | Tenfish Lake | A | - | 5.7 µg/L |
| 61 | Three Lakes Lake | A | - | 5.7 µg/L |
| 62 | Thurston Lake | A | - | 3.6 µg/L |
| 63 | Toodee Lake | A | - | 6.3 µg/L |
| 64 | Treeby Lake | A | - | 6.6 µg/L |
| 65 | Trout Lake | A | - | 5.3 µg/L |
| 66 | Tupper Lake | A | - | 6.8 µg/L |
| 67 | White Bear Lake | A | - | 4.4 µg/L |
| 68 | Anvil Lake | A | 17.7 ft | 4.1 µg/L |
| 69 | Astonish Lake | A | 19.4 ft | 2.9 µg/L |
| 70 | Bay Lake | A | 32.8 ft | 2.9 µg/L |
| 71 | Borzoi Lake | A | 15.6 ft | 3.7 µg/L |
| 72 | Cobre Lake | A | - | 1.7 µg/L |
| 73 | Castra Lake | A | - | 3.7 µg/L |
| 74 | Chub Lake | A | 16.7 ft | 4.8 µg/L |
| 75 | Curve Lake | A | - | 9.1 µg/L |
| 76 | Dayohessarah Lake | A | 19.7 ft | 5.3 µg/L |
| 77 | Endikai Lake | A | 19 ft | 3.8 µg/L |
| 78 | Gamitagama Lake | A | 20.3 ft | 4.2 µg/L |
| 79 | Kirkpatrick Lake | A | 17.8 ft | 7.9 µg/L |
| 80 | Kwagama Lake | A | 27.4 ft | 3.4 µg/L |
| 81 | Lake Placid | A | - | 11.8 µg/L |
| 82 | Lauzon Lake | A | 17.6 ft | 2.9 µg/L |
| 83 | Lena Lake | A | 15.7 ft | 6.1 µg/L |
| 84 | Rawhide Lake | A | 18.4 ft | 4.1 µg/L |
| 85 | Red Pine Lake | A | 26.2 ft | 2.6 µg/L |
| 86 | Saymo Lake | A | 23 ft | - |
| 87 | Shelden Lake | A | 16.4 ft | 2.2 µg/L |
| 88 | Sill Lake | A | 19.4 ft | 5.3 µg/L |
| 89 | Smith Lake | A | 15.6 ft | 5.2 µg/L |
| 90 | Teasdale Lake | A | 15.9 ft | 6.8 µg/L |
| 91 | Whiskey Lake | A | 16.7 ft | - |
| 92 | Wakomata Lake | A | 19.4 ft | 4.5 µg/L |
| 93 | Wawa Lake | A | 16.7 ft | 4.8 µg/L |
| 94 | Weckstrom Lake | A | 21.3 ft | 10.8 µg/L |
| 95 | Woodosgoon Lake | A | - | 7.2 µg/L |
| 96 | Aberdeen Lake | A | 11.5 ft | 12 µg/L |
| 97 | Brownlee Lake | A | 12.5 ft | 11.9 µg/L |
| 98 | Depot Lake | A | 10.2 ft | 7.1 µg/L |
| 99 | Diamond Lake | A | 12.5 ft | 6.6 µg/L |
| 100 | Duborne Lake | A | 10.7 ft | 6.5 µg/L |
| 101 | East Twin Lake | A | 12.5 ft | 7.7 µg/L |
| 102 | Elliot Lake | A | 13.5 ft | 4.1 µg/L |
| 103 | Esten Lake | A | 12.3 ft | 15.6 µg/L |
| 104 | Grandeur Lake | A | 10.5 ft | 7.3 µg/L |
| 105 | Magog Lake | A | 12.5 ft | 4.6 µg/L |
| 106 | Marshland Lake | A | 10.5 ft | 6.5 µg/L |
| 107 | Mccarthy Lake | A | 10.8 ft | 6.3 µg/L |
| 108 | Mcewing Lake | A | 11.2 ft | 9.6 µg/L |
| 109 | Nagagamisis Lake | A | 10.5 ft | 8.9 µg/L |
| 110 | Northland Lake | A | 11.5 ft | 4.8 µg/L |
| 111 | Patten Lake | A | 13.5 ft | 5.3 µg/L |
| 112 | Popeye Lake | A | 14.4 ft | 7 µg/L |
| 113 | Rock Lake | A | 13.1 ft | 8.7 µg/L |
| 114 | Round Lake | A | 12.3 ft | 14.8 µg/L |
| 115 | Trout Lake | A | 10.8 ft | 6.6 µg/L |
| 116 | Upper Island Lake | A | 12.3 ft | 5.1 µg/L |
| 117 | West Larkin Lake | A | 12.1 ft | 8.5 µg/L |
| 118 | Constance Lake | A | 13.1 ft | 9.6 µg/L |
| 119 | Mcgiverin Lake | A | 11.8 ft | 5.1 µg/L |
| 120 | Old Woman Lake | A | 14.4 ft | 5.2 µg/L |
| 121 | Alexander Lake | A | 10.2 ft | 6.3 µg/L |
| 122 | Beak Lake | A | 11.5 ft | 8.1 µg/L |
| 123 | Big Moon Lake | A | 12.1 ft | 3.8 µg/L |
| 124 | Black Trout Lake | A | 12.1 ft | 5.4 µg/L |
| 125 | Boumage Lake | A | 10.5 ft | 3.7 µg/L |
| 126 | Callahan Lake | A | 12.8 ft | 5.4 µg/L |
| 127 | Cameron Lake | A | 12.3 ft | 11.6 µg/L |
| 128 | Cataract Lake | A | 11.5 ft | 5 µg/L |
| 129 | Catfish Lake | A | 11.2 ft | 11.4 µg/L |
| 130 | Cumming'S Lake | A | 12.5 ft | 3.6 µg/L |
| 131 | Duval Lake | A | 11.5 ft | 4.8 µg/L |
| 132 | Ear Lake | A | 13.5 ft | 5.6 µg/L |
| 133 | Geiger Lake | A | 13.5 ft | 6.3 µg/L |
| 134 | Galloway Lake | A | 10.2 ft | 7.6 µg/L |
| 135 | Gong Lake | A | 11.8 ft | 5 µg/L |
| 136 | Grant Lake | A | 11.5 ft | 6.7 µg/L |
| 137 | Gull Lake | A | 11.8 ft | 6.7 µg/L |
| 138 | Klondyke Lake | A | 12.5 ft | 6.6 µg/L |
| 139 | Little Dossier Lake | A | 13.8 ft | 5.5 µg/L |
| 140 | Mcewen Lake | A | 13.1 ft | 6 µg/L |
| 141 | Mcmahon Lake | A | 14.4 ft | 6.9 µg/L |
| 142 | Mozhabong Lake | A | 14.8 ft | 4.6 µg/L |
| 143 | Penelope Lake | A | 14.8 ft | 7.8 µg/L |
| 144 | Radium Lake | A | 11.5 ft | 6.7 µg/L |
| 145 | Speight Lake | A | 13.9 ft | 5.5 µg/L |
| 146 | Spinweb Lake | A | 14.4 ft | 4 µg/L |
| 147 | Wallace Lake | A | 14.8 ft | 4.3 µg/L |
| 148 | Ward Lake | A | 10.5 ft | 3.8 µg/L |
| 149 | Birch Lake | B | 8.9 ft | 9 µg/L |
| 150 | Bright Lake | B | 8.2 ft | 15.9 µg/L |
| 151 | Caribou Lake | B | 8.5 ft | 11.5 µg/L |
| 152 | Cranberry Lake | B | 7.5 ft | 12.6 µg/L |
| 153 | Dean Lake | B | 9.5 ft | 16.4 µg/L |
| 154 | Esten Lake East | B | 7.5 ft | 15.5 µg/L |
| 155 | Lang Lake | B | 9.5 ft | 9.3 µg/L |
| 156 | Picnic Lake | B | 14.1 ft | - |
| 157 | Garden Lake | B | 10.2 ft | - |
| 158 | Mijinemungshing Lake | B | 9.4 ft | 9.8 µg/L |
| 159 | Rochester Lake | B | - | 22.5 µg/L |
| 160 | Anjigami Lake | B | 8.4 ft | 7.3 µg/L |
| 161 | Bark Lake | B | 7.5 ft | 7.9 µg/L |
| 162 | Bittern Lake | B | 8.2 ft | 8.4 µg/L |
| 163 | Deschamp Lake | B | 7.5 ft | 9.4 µg/L |
| 164 | Dog Lake | B | 8.2 ft | 5.7 µg/L |
| 165 | Dunkerly Lake | B | 7.2 ft | 5.7 µg/L |
| 166 | Goulais Lake | B | 7.4 ft | 9.4 µg/L |
| 167 | Grassy Lake | B | 9.2 ft | 6 µg/L |
| 168 | Hanes Lake | B | 7.9 ft | 6.3 µg/L |
| 169 | Kabinakagamisis Lake | B | 8.5 ft | 7.7 µg/L |
| 170 | Sand Lake | B | 8.7 ft | 9.1 µg/L |
| 171 | Logan Lake | B | 8.9 ft | 9.5 µg/L |
| 172 | Manitowik Lake | B | 8.5 ft | 8.8 µg/L |
| 173 | Matchinameigus Lake | B | 9.5 ft | 6.6 µg/L |
| 174 | Matthews Lake | B | 9.8 ft | 8.7 µg/L |
| 175 | Mile Lake | B | 8.9 ft | 4.9 µg/L |
| 176 | Nagagami Lake | B | 9.8 ft | 6 µg/L |
| 177 | Nagagamisis Lake | B | 9.4 ft | 11.5 µg/L |
| 178 | Newlands Lake | B | 8.2 ft | 7.3 µg/L |
| 179 | Oba Lake | B | 8.2 ft | 8.4 µg/L |
| 180 | Opasatika Lake | B | 7.5 ft | 15.9 µg/L |
| 181 | Quinn Lake | B | 7.5 ft | 5.1 µg/L |
| 182 | Rossmere Lake | B | 6.9 ft | 6.3 µg/L |
| 183 | Saddle Lake | B | 8.5 ft | 5.7 µg/L |
| 184 | Shekak Lake | B | 7.4 ft | 7.3 µg/L |
| 185 | South Branch Lake | B | 8.9 ft | 7.1 µg/L |
| 186 | South Greenhill Lake | B | 8.7 ft | 7.7 µg/L |
| 187 | Stranded Lake | B | 9.8 ft | 7.8 µg/L |
| 188 | Strickland Lake | B | 8 ft | 3.9 µg/L |
| 189 | Tatnall Lake | B | 9.5 ft | 6.9 µg/L |
| 190 | Tocheri Lake | B | 9.8 ft | 10.3 µg/L |
| 191 | Turtle Lake | B | 8.9 ft | 7.4 µg/L |
| 192 | Wabigoon Lake | B | 6.9 ft | 7 µg/L |
| 193 | Whitefish Lake | B | 7.5 ft | 7.4 µg/L |
| 194 | Echo Lake | B | 4.9 ft | 10.3 µg/L |
| 195 | Gordon Lake | B | 6.6 ft | 16.1 µg/L |
| 196 | Ottertail Lake | B | 5.9 ft | 16.1 µg/L |
| 197 | Prince Lake | B | 5.9 ft | 10.4 µg/L |
| 198 | Aubrey Lake | B | 5.9 ft | 8.5 µg/L |
| 199 | Brunswick Lake | B | 6.6 ft | 11.1 µg/L |
| 200 | Graham Lake | B | 6.2 ft | 8.1 µg/L |
| 201 | Gull Lake | B | 4.9 ft | 8.8 µg/L |
| 202 | Haken Lake | B | 6.6 ft | 8.4 µg/L |
| 203 | Hiawatha Lake | B | 6.6 ft | 5.4 µg/L |
| 204 | Kabinakagami Lake | B | 5.6 ft | 10.3 µg/L |
| 205 | Kapuskasing Lake | B | 4.3 ft | 17 µg/L |
| 206 | Lower Minnipuka Lake | B | 4.1 ft | 7.6 µg/L |
| 207 | Point Lake | B | 5.2 ft | 6.8 µg/L |
| 208 | Shikwamkwa Lake | B | 6.6 ft | 8.4 µg/L |
| 209 | Wabatongushi Lake | B | 6.6 ft | 10.3 µg/L |
| 210 | Watson Lake | B | 6.6 ft | 4.7 µg/L |
| 211 | West Kabenung Lake | B | 5.7 ft | 3.7 µg/L |
| 212 | Doehead Lake | C | 12.5 ft | 65.2 µg/L |
| 213 | Nameigos Lake | C | 3.3 ft | 9.6 µg/L |
| 214 | Desbarats Lake | C | 3.3 ft | 24.2 µg/L |
| 215 | Lapworth Lake | C | 3.8 ft | 30.2 µg/L |
| 216 | Vesi Lake | C | 9 ft | 60.5 µg/L |
| 217 | Gibboney Lake | D | 3.3 ft | 41.4 µg/L |
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Source: EPA National Aquatic Resource Surveys, 2026.