Thunder Bay District County Lake Quality
Ontario, 300 lakes, average grade B (Good)
Thunder Bay District County has 300 graded lakes, enough that within-county variation matters as much as the county average. Some are deep glacial basins, others are shallow agricultural-watershed waters, and the grade distribution reflects that mix. The county-wide average lands at B — solid water quality with most lakes carrying clear summer transparency and low-to-moderate phosphorus.
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. Arrow Lake (A) is the cleanest in the county.
Quick Answers for Thunder Bay District County
Planning a trip? Check special fishing regulations for Arrow Lake — or check the official Ontario fishing regulations.
All Lakes in Thunder Bay District County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Arrow Lake | A | 24 ft | 7.5 µg/L |
| 2 | Athelstane Lake | A | - | 12.1 µg/L |
| 3 | Batwing Lake | A | - | 13.8 µg/L |
| 4 | Burchell Lake | A | - | 7.5 µg/L |
| 5 | Deception Lake | A | 20.2 ft | 5.8 µg/L |
| 6 | Hawkeye Lake | A | - | 12.8 µg/L |
| 7 | Hazelwood Lake | A | - | 8.3 µg/L |
| 8 | Hoof Lake | A | - | 15.9 µg/L |
| 9 | Little Athelstane Lake | A | - | 11.9 µg/L |
| 10 | Loon Lake | A | - | 8.9 µg/L |
| 11 | Myrt Lake | A | - | 6.4 µg/L |
| 12 | Oliver Lake | A | 19 ft | 5.2 µg/L |
| 13 | Pagwachuan Lake | A | 17.4 ft | - |
| 14 | Prelate Lake | A | - | 14.5 µg/L |
| 15 | Silver Lake | A | 16.1 ft | 5.1 µg/L |
| 16 | Sunday Lake | A | - | 13.4 µg/L |
| 17 | Sunset Lake | A | 15.6 ft | 7.9 µg/L |
| 18 | Two Island Lake | A | - | 11.1 µg/L |
| 19 | Obonga Lake | A | - | 7.5 µg/L |
| 20 | Deer Lake | A | - | 8.2 µg/L |
| 21 | Elizabeth Lake | A | - | 9.7 µg/L |
| 22 | Firehill Lake | A | - | 8.5 µg/L |
| 23 | Florence Lake | A | - | 6.1 µg/L |
| 24 | Foxxe Lake | A | - | 4.4 µg/L |
| 25 | Frazer Lake | A | - | 6.8 µg/L |
| 26 | Hicks Lake | A | - | 8.9 µg/L |
| 27 | Jackfish Lake | A | - | 10.1 µg/L |
| 28 | Little Santoy Lake | A | - | 7.1 µg/L |
| 29 | Lofquist Lake | A | - | 6.2 µg/L |
| 30 | Maki Lake | A | - | 9.1 µg/L |
| 31 | Mary Lake | A | - | 11.3 µg/L |
| 32 | Mcleish Lake | A | - | 8.4 µg/L |
| 33 | Milton Lake | A | - | 16.6 µg/L |
| 34 | Paul Lake | A | - | 9 µg/L |
| 35 | Polly Lake | A | - | 11.6 µg/L |
| 36 | Rolland Lake | A | - | 7.6 µg/L |
| 37 | Sandstone Lake | A | - | 7.9 µg/L |
| 38 | Santoy Lake | A | - | 5.1 µg/L |
| 39 | Stewart Lake | A | - | 6.5 µg/L |
| 40 | Timmus Lake | A | - | 4.8 µg/L |
| 41 | Walkinshaw Lake | A | - | 10.5 µg/L |
| 42 | Whitelily Lake | A | - | 11.9 µg/L |
| 43 | Whitesand Lake | A | 15.1 ft | 5.6 µg/L |
| 44 | Windigokan Lake | A | - | 8 µg/L |
| 45 | Yellowhammer Lake | A | - | 6.1 µg/L |
| 46 | Arnott Lake | A | 23 ft | 14.3 µg/L |
| 47 | Bamoos Lake | A | 16.4 ft | 12.3 µg/L |
| 48 | Burchell L. Lake | A | 20.7 ft | 3.2 µg/L |
| 49 | Castle L. Lake | A | 16.7 ft | 6.3 µg/L |
| 50 | Cry L. Lake | A | 24.3 ft | 4.2 µg/L |
| 51 | Empire Lake | A | 20.8 ft | 12.2 µg/L |
| 52 | Greenwater Lake | A | 47.9 ft | 1.8 µg/L |
| 53 | Greenwater L. Lake | A | 15.4 ft | 6.1 µg/L |
| 54 | Grouse L. Lake | A | 15.1 ft | 6.3 µg/L |
| 55 | Little Moraine Lake | A | 22.6 ft | 9.6 µg/L |
| 56 | Magone Lake | A | 26.2 ft | 12.7 µg/L |
| 57 | Minchin Lake | A | 15.7 ft | 6.2 µg/L |
| 58 | Mishi Lake | A | 18 ft | 3.9 µg/L |
| 59 | Pagwachuan Lake | A | 15.4 ft | 6.8 µg/L |
| 60 | Pringle Lake | A | 17.6 ft | 5.1 µg/L |
| 61 | Squeers Lake | A | 19.7 ft | 11.4 µg/L |
| 62 | Sturgeon Lake | A | 21 ft | - |
| 63 | Unknown Lake | A | 19.7 ft | 5.8 µg/L |
| 64 | Walotka L. Lake | A | 16.4 ft | 5.4 µg/L |
| 65 | Waweig L. Lake | A | 19 ft | 5.9 µg/L |
| 66 | Wig Lake | A | 14.9 ft | 9 µg/L |
| 67 | Bass Lake | A | 11.8 ft | 8.3 µg/L |
| 68 | Greenwater Lake | A | 12.6 ft | 13 µg/L |
| 69 | Icarus Lake | A | 11.8 ft | 9.2 µg/L |
| 70 | Island Lake | A | 12.6 ft | 8.2 µg/L |
| 71 | Shebandowan Lake | A | 10.8 ft | 9.3 µg/L |
| 72 | Superior Lake | A | 10.8 ft | 5.2 µg/L |
| 73 | White Lake | A | 11.2 ft | 8.2 µg/L |
| 74 | Windigoostigwan Lake | A | 11.5 ft | 5.6 µg/L |
| 75 | Arrow L. Lake | A | 12.8 ft | 6.1 µg/L |
| 76 | Athelstane L. Lake | A | 10.5 ft | 8.5 µg/L |
| 77 | Atik L. Lake | A | 12.1 ft | 8.3 µg/L |
| 78 | Barbara Lake | A | 10.8 ft | 3.5 µg/L |
| 79 | Beatty L. Lake | A | 13.5 ft | 9.7 µg/L |
| 80 | Bisect Lake | A | 11.5 ft | 6.4 µg/L |
| 81 | Camel Read Lake | A | 13.1 ft | 4.8 µg/L |
| 82 | Cliff Lake | A | 14.8 ft | 5.5 µg/L |
| 83 | Crevasse Lake | A | 13.8 ft | 6.9 µg/L |
| 84 | De Lesseps Lake | A | 11.5 ft | 4.5 µg/L |
| 85 | Disraeli Lake | A | 13.1 ft | 7.4 µg/L |
| 86 | Eileen Lake | A | 14.8 ft | 11.1 µg/L |
| 87 | Fallingsnow L. Lake | A | 12.8 ft | 5.3 µg/L |
| 88 | Fernow Lake | A | 13.1 ft | 9.1 µg/L |
| 89 | Frazer L. Lake | A | 10.5 ft | 7.4 µg/L |
| 90 | Hilma Lake | A | 10.5 ft | 11.2 µg/L |
| 91 | Huronian L. Lake | A | 10.5 ft | 5.3 µg/L |
| 92 | Innes L. Lake | A | 10 ft | 7.4 µg/L |
| 93 | Jackfish Lake | A | 13.1 ft | 9.3 µg/L |
| 94 | Jeno Lake | A | 12.1 ft | 18.6 µg/L |
| 95 | Kagiano Lake | A | 11.5 ft | 6.2 µg/L |
| 96 | Kamikau L. Lake | A | 10.8 ft | 5.1 µg/L |
| 97 | Killala Lake | A | 13.3 ft | 7.4 µg/L |
| 98 | Klotz Lake | A | 10.3 ft | 11 µg/L |
| 99 | Lake Nipigon | A | 11.5 ft | 9.2 µg/L |
| 100 | Little North Lake | A | 19.7 ft | 25.6 µg/L |
| 101 | Long Lake | A | 10.2 ft | 7 µg/L |
| 102 | Mack Lake | A | 11.2 ft | 16.2 µg/L |
| 103 | Mckay Lake | A | 11.5 ft | 9.9 µg/L |
| 104 | North Mccrea Lake | A | 11.5 ft | 5.7 µg/L |
| 105 | Parks Lake | A | 10.3 ft | 6.7 µg/L |
| 106 | Saganagons Lake | A | 10 ft | 8.6 µg/L |
| 107 | Sandspit Lake | A | 12.3 ft | 10.7 µg/L |
| 108 | Sandstone L. Lake | A | 10.2 ft | 8.4 µg/L |
| 109 | Shacabac Lake | A | 13.1 ft | 19 µg/L |
| 110 | Springwater Lake | A | 13.5 ft | 10.9 µg/L |
| 111 | Stetham L. Lake | A | 10.2 ft | 5.9 µg/L |
| 112 | Tilly L. Lake | A | 11.2 ft | 3.9 µg/L |
| 113 | Tinto L. Lake | A | 10.5 ft | 6.7 µg/L |
| 114 | Titmarsh L. Lake | A | 12.1 ft | 5.2 µg/L |
| 115 | Twinhouse L. Lake | A | 11.8 ft | 6.3 µg/L |
| 116 | Wawang Lake | A | 11.2 ft | 10.6 µg/L |
| 117 | Weewullee L. Lake | A | 10.5 ft | 7.7 µg/L |
| 118 | Wideman L. Lake | A | 12.8 ft | 6.5 µg/L |
| 119 | Wildgoose Lake | A | 11.6 ft | 7.7 µg/L |
| 120 | Wintering Lake | A | 12.3 ft | 8 µg/L |
| 121 | Barnum Lake | B | 7.2 ft | 9.2 µg/L |
| 122 | Burk Lake | B | 9.8 ft | 6 µg/L |
| 123 | Elbow Lake | B | 9.5 ft | 8.3 µg/L |
| 124 | Iron Range Lake | B | 8.9 ft | 7.7 µg/L |
| 125 | Kashabowie Lake | B | 7.4 ft | 6.9 µg/L |
| 126 | Loon Lake | B | 7.5 ft | 12.5 µg/L |
| 127 | Lyne Lake | B | 9.8 ft | 7.1 µg/L |
| 128 | Marks Lake | B | 6.9 ft | 10.4 µg/L |
| 129 | Peterkin Lake | B | 7.5 ft | 12.2 µg/L |
| 130 | Roundtable Lake | B | 7.9 ft | 8.8 µg/L |
| 131 | Shebandowan Lake | B | 8 ft | 12 µg/L |
| 132 | Shebandowan Lake | B | 9.2 ft | 7.9 µg/L |
| 133 | Spike Lake | B | 7.4 ft | 10.5 µg/L |
| 134 | Sunbow Lake | B | 7.5 ft | 8.9 µg/L |
| 135 | Swallow Lake | B | - | 23.4 µg/L |
| 136 | Tomlinson Lake | B | 7.5 ft | 9.1 µg/L |
| 137 | Tornroos Lake | B | 9.2 ft | 9.3 µg/L |
| 138 | Upper Hunter'S Lake | B | 9.5 ft | 6.8 µg/L |
| 139 | Walker Lake | B | 9 ft | 5.4 µg/L |
| 140 | Warnica Lake | B | 9.5 ft | 12.9 µg/L |
| 141 | Whitefish Lake | B | 8 ft | 10.7 µg/L |
| 142 | Beck Lake | B | 6.9 ft | 11.1 µg/L |
| 143 | Bedivere Lake | B | 7.7 ft | 13.6 µg/L |
| 144 | Bell Lake | B | 12.8 ft | - |
| 145 | Black Sturgeon L. Lake | B | 9.8 ft | 4.4 µg/L |
| 146 | Buckaday Lake | B | 9.4 ft | 10.1 µg/L |
| 147 | Burrows Lake | B | 6.9 ft | 11.4 µg/L |
| 148 | Cairngorm Lake | B | 8.7 ft | 5.1 µg/L |
| 149 | Charon Lake | B | 8.2 ft | 15.6 µg/L |
| 150 | Circle L. Lake | B | 6.9 ft | 10.5 µg/L |
| 151 | Clegge Lake | B | 8.9 ft | 5.6 µg/L |
| 152 | Diablo Lake | B | 9.8 ft | 11.4 µg/L |
| 153 | Dilla Lake | B | 8.5 ft | 9.9 µg/L |
| 154 | Dog L. Lake | B | 7.5 ft | 7.9 µg/L |
| 155 | Elbow L. Lake | B | 8.2 ft | 10 µg/L |
| 156 | Ellen Lake | B | 8.5 ft | 4 µg/L |
| 157 | Gamsby Lake | B | 8.2 ft | 6.8 µg/L |
| 158 | Gennis Lake | B | 8.5 ft | 8.1 µg/L |
| 159 | Granite Lake | B | 8.2 ft | 7.6 µg/L |
| 160 | Greenbush Lake | B | 9.7 ft | 7.3 µg/L |
| 161 | Greenwich L. Lake | B | 7.5 ft | 4.2 µg/L |
| 162 | Hamilton Lake | B | 9.2 ft | 6.4 µg/L |
| 163 | Harmon Lake | B | 7.2 ft | 8.3 µg/L |
| 164 | Hine Lake | B | 6.9 ft | 8.6 µg/L |
| 165 | Icarus L. Lake | B | 6.9 ft | 10.4 µg/L |
| 166 | Kashabowie L. Lake | B | 8.9 ft | 7.8 µg/L |
| 167 | Kashishibog Lake | B | 8.2 ft | 8.3 µg/L |
| 168 | Kawaweogama Lake | B | 9.4 ft | 9.2 µg/L |
| 169 | Kearns L. Lake | B | 6.9 ft | 10.9 µg/L |
| 170 | Kilbarry Lake | B | 8.2 ft | 7.9 µg/L |
| 171 | Kilgour Lake | B | 7.2 ft | 8.2 µg/L |
| 172 | Kwinkwaga Lake | B | 7.9 ft | 6.6 µg/L |
| 173 | Little Hilma Lake | B | 7.2 ft | 6 µg/L |
| 174 | Louise Lake | B | 8.2 ft | 7 µg/L |
| 175 | Lower Shebandowan Lake | B | 7.2 ft | 10.5 µg/L |
| 176 | Macintosh Lake | B | 7.2 ft | 7.5 µg/L |
| 177 | Marie Louise Lake | B | 8.2 ft | 8.6 µg/L |
| 178 | Mccrea Lake | B | 9.2 ft | 7.4 µg/L |
| 179 | Middle Shebandowan Lake | B | 9 ft | 7.4 µg/L |
| 180 | Middle Shebandowan Lake | B | 7.5 ft | 10 µg/L |
| 181 | Mikinak Lake | B | 7.2 ft | 10 µg/L |
| 182 | Mowe L. Lake | B | 8.2 ft | 10.7 µg/L |
| 183 | Nalla Lake | B | 13 ft | 20.2 µg/L |
| 184 | Northern Light L. Lake | B | 8.5 ft | 11.4 µg/L |
| 185 | Obonga L. Lake | B | 9.2 ft | 5.3 µg/L |
| 186 | Onaman Lake | B | 7.4 ft | 10.4 µg/L |
| 187 | One Island Lake | B | 7.4 ft | 4.2 µg/L |
| 188 | Oskawe Lake | B | 8.2 ft | 9.5 µg/L |
| 189 | Pakashkan L. Lake | B | 9.8 ft | 9.9 µg/L |
| 190 | Partridge Lake | B | 8.2 ft | 6.5 µg/L |
| 191 | Proctor Lake | B | 9.8 ft | 8.3 µg/L |
| 192 | Randolph Lake | B | 9.8 ft | 7.1 µg/L |
| 193 | Ripple Lake | B | 7.9 ft | 7.9 µg/L |
| 194 | Rudge L. Lake | B | 9.8 ft | 5.1 µg/L |
| 195 | Savant Lake | B | 13.8 ft | - |
| 196 | Scruffy Lake | B | 7.2 ft | 10 µg/L |
| 197 | Shawanibis Lake | B | 7.2 ft | 6.1 µg/L |
| 198 | Silver Lake | B | 7.5 ft | 8.2 µg/L |
| 199 | South Beatty Lake | B | 8.2 ft | 9.7 µg/L |
| 200 | Stingray Lake | B | 9.8 ft | 5.3 µg/L |
| 201 | Upper Shebandowan Lake | B | 9.2 ft | 7.2 µg/L |
| 202 | Victoria Lake | B | 13.5 ft | - |
| 203 | Weese Lake | B | 8.2 ft | 7.5 µg/L |
| 204 | White Otter Lake | B | 8.7 ft | 9.1 µg/L |
| 205 | Cummins Lake | B | 5.2 ft | 11.3 µg/L |
| 206 | Fodder Lake | B | 3.6 ft | 13.1 µg/L |
| 207 | Greenpike Lake | B | 6.4 ft | 8.3 µg/L |
| 208 | Ham Lake | B | 6.2 ft | 11.3 µg/L |
| 209 | Howcum Lake | B | 5.7 ft | 12.6 µg/L |
| 210 | Lenore Lake | B | 6.6 ft | 12.3 µg/L |
| 211 | Little Cedar Lake | B | 6.2 ft | 16.4 µg/L |
| 212 | Lottit Lake | B | 4.9 ft | 11.8 µg/L |
| 213 | Maccormack Lake | B | 6.2 ft | 9.2 µg/L |
| 214 | Madalaine Lake | B | 6.6 ft | 9.8 µg/L |
| 215 | One Island Lake | B | 6.1 ft | 8 µg/L |
| 216 | Reta Lake | B | 6.1 ft | 7.4 µg/L |
| 217 | Shaco Lake | B | 6.4 ft | 8 µg/L |
| 218 | Surprise Lake | B | 5.6 ft | 10.8 µg/L |
| 219 | Trout Lake | B | 5.9 ft | 10.5 µg/L |
| 220 | Wartman Lake | B | 4.9 ft | 9 µg/L |
| 221 | Addie Lake | B | 6.2 ft | 11.7 µg/L |
| 222 | Arrowroot Lake | B | 4.9 ft | 8.2 µg/L |
| 223 | Barbara Lake | B | 6.2 ft | 12.5 µg/L |
| 224 | Batwing L. Lake | B | 5.6 ft | 8.8 µg/L |
| 225 | Big Duck Lake | B | 4.9 ft | 12.1 µg/L |
| 226 | Bigamy Lake | B | 3.4 ft | 10.1 µg/L |
| 227 | Blunder Lake | B | 5.1 ft | 12.3 µg/L |
| 228 | Brightsand Lake | B | 4.9 ft | 10.8 µg/L |
| 229 | Catlonite Lake | B | 6.2 ft | 7.1 µg/L |
| 230 | Cavell Lake | B | 4.9 ft | 6.6 µg/L |
| 231 | Crayfish Lake | B | 5.9 ft | 8.6 µg/L |
| 232 | Frank Lake | B | 5.2 ft | 12.5 µg/L |
| 233 | Grassy Lake | B | 6.6 ft | 9.8 µg/L |
| 234 | Greenwood Lake | B | 6.6 ft | 9 µg/L |
| 235 | Heathcote Lake | B | 4.9 ft | 6.4 µg/L |
| 236 | Holinshead L. Lake | B | 5.9 ft | 15.9 µg/L |
| 237 | Holly L. Lake | B | 6.6 ft | 7.3 µg/L |
| 238 | Jacob Lake | B | 6.2 ft | 19.9 µg/L |
| 239 | Jolly L. Lake | B | 5.2 ft | 13.5 µg/L |
| 240 | Kekekuab Lake | B | 4.9 ft | 14.6 µg/L |
| 241 | Lac des Iles Lake | B | 6.6 ft | 18.4 µg/L |
| 242 | Des Mille Lacs Lake | B | 5.9 ft | 17.7 µg/L |
| 243 | Lac du Milieu Lake | B | 5.9 ft | 16.2 µg/L |
| 244 | Marks Lake | B | 3.9 ft | 16.6 µg/L |
| 245 | Little Metionga Lake | B | 5.2 ft | 12.7 µg/L |
| 246 | Loganberry Lake | B | 4.9 ft | 15.1 µg/L |
| 247 | Lost L. Lake | B | 5.6 ft | 9.1 µg/L |
| 248 | Mackenzie Lake | B | 6.6 ft | 13.7 µg/L |
| 249 | Maggotte L. Lake | B | 5.2 ft | 8.7 µg/L |
| 250 | Mccrea Lake | B | 6.2 ft | 7 µg/L |
| 251 | Metionga Lake | B | 5.6 ft | 10.2 µg/L |
| 252 | Muskeg Lake | B | 5.6 ft | 19.4 µg/L |
| 253 | Muskrat L. Lake | B | 5.9 ft | 18.7 µg/L |
| 254 | Nelson Lake | B | 6.6 ft | 12.4 µg/L |
| 255 | Pearson Lake | B | 6.2 ft | 16.2 µg/L |
| 256 | Penassen Lake | B | 6.6 ft | 8.2 µg/L |
| 257 | Pinel Lake | B | 5.6 ft | 8.9 µg/L |
| 258 | Purdom L. Lake | B | 5.2 ft | 10.9 µg/L |
| 259 | Rabbitbelly Lake | B | 5.2 ft | 12.2 µg/L |
| 260 | Redhead Lake | B | 4.3 ft | 9.3 µg/L |
| 261 | Ricestalk Lake | B | 4.3 ft | 14.4 µg/L |
| 262 | Sandison Lake | B | 4.3 ft | 7.3 µg/L |
| 263 | Sassenach Lake | B | 5.6 ft | 6.2 µg/L |
| 264 | Savas Lake | B | 4.6 ft | 13.3 µg/L |
| 265 | Shabuskwia Lake | B | 4.9 ft | 9.7 µg/L |
| 266 | Sparkling L. Lake | B | 6.6 ft | 8.7 µg/L |
| 267 | Sprat Lake | B | 3.9 ft | 9.5 µg/L |
| 268 | Union Lake | B | 6.6 ft | 13.6 µg/L |
| 269 | Upper Hunters Lake | B | 6.6 ft | 8.6 µg/L |
| 270 | Upper Kaogomok Lake | B | 4.9 ft | 15.9 µg/L |
| 271 | Wabakimi Lake | B | 6.6 ft | 6.6 µg/L |
| 272 | Wabinosh Lake | B | 5.6 ft | 15.5 µg/L |
| 273 | Wapikaimaski Lake | B | 5.7 ft | 8.2 µg/L |
| 274 | Weaver Lake | B | 5.9 ft | 12.1 µg/L |
| 275 | Webster Lake | B | 5.9 ft | 8.3 µg/L |
| 276 | Weikwabinonaw Lake | B | 5.2 ft | 10.1 µg/L |
| 277 | West Arm Armistice Lake | B | 4.9 ft | 10.5 µg/L |
| 278 | Whiteclay Lake | B | 6.6 ft | 7 µg/L |
| 279 | Young Lake | B | 3.6 ft | 17.3 µg/L |
| 280 | Beaverkit Lake | C | 2.6 ft | 11.4 µg/L |
| 281 | Cloud Lake | C | 4.3 ft | 23.9 µg/L |
| 282 | Cushing Lake | C | 3.8 ft | 21.1 µg/L |
| 283 | Lac des Mille Lacs Lake | C | 4.3 ft | 22.7 µg/L |
| 284 | No Name Lake | C | 9.2 ft | - |
| 285 | Upsala Lake | C | 7.9 ft | - |
| 286 | Arc Lake | C | 7.5 ft | - |
| 287 | Bukemiga Lake | C | 6.6 ft | 23.3 µg/L |
| 288 | Kenogamisis Lake | C | 3.3 ft | 15.1 µg/L |
| 289 | Seseganaga Lake | C | 7.5 ft | - |
| 290 | Snowshoe Lake | C | 6.6 ft | 22.1 µg/L |
| 291 | Cox Lake | D | 2 ft | 51.3 µg/L |
| 292 | Wabikoba Lake | D | 6.6 ft | - |
| 293 | Bertaud Lake | D | 6.2 ft | - |
| 294 | Fitchie Lake | D | 5.2 ft | - |
| 295 | Fog Lake | D | 5.9 ft | - |
| 296 | Frain Lake | D | 4.9 ft | - |
| 297 | Miniss L. Lake | D | 6.2 ft | - |
| 298 | Pashkokogan Lake | D | 6.2 ft | - |
| 299 | Selwyn Lake | D | 4.3 ft | - |
| 300 | Smye Lake | D | 4.9 ft | - |
Other Counties in Ontario
See how Thunder Bay District County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 38 states.
Where to stay near Thunder Bay District County
Top-rated places to stay near Thunder Bay District County
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a trip to Thunder Bay District County?
Get lake water-quality report cards plus the best cabin & lodging deals near Thunder Bay District County — straight to your inbox. No spam, unsubscribe anytime.
Source: EPA National Aquatic Resource Surveys, 2026.