Lakes With Algae Problems in Minnesota
50 lakes in Minnesota report elevated algae levels (chlorophyll-a above 20 µg/L). These lakes are most likely to develop blue-green algae blooms during warm, calm summer weather. Avoid swimming during visible blooms and rinse pets after contact.
Ranked List
| # | Lake | County | Grade | Clarity | Phosphorus | Algae |
|---|---|---|---|---|---|---|
| 1 | Olson Lake | Big Stone | NR | 0.7 ft | 774 µg/L | 384 µg/L |
| 2 | Cowley Lake | Hennepin | F | 0.8 ft | 738.6 µg/L | 343.5 µg/L |
| 3 | Domeier Lake | Brown | NR | 1 ft | 246 µg/L | 332 µg/L |
| 4 | Unnamed Lake | Brown | NR | 0.3 ft | - | 300 µg/L |
| 5 | Alice Lake | Otter Tail | F | 0.8 ft | 494 µg/L | 254 µg/L |
| 6 | Maria Lake | Carver | F | 0.8 ft | 457 µg/L | 249.5 µg/L |
| 7 | Uhlenkolts Lake | Stearns | F | 0.7 ft | 187 µg/L | 205 µg/L |
| 8 | Talcot Lake | Cottonwood | NR | 0.2 ft | 367 µg/L | 193 µg/L |
| 9 | Fountain Lake | Wright | F | 1 ft | 126.5 µg/L | 174 µg/L |
| 10 | Clear Lake | Stevens | NR | 0.7 ft | 288 µg/L | 171 µg/L |
| 11 | Mccarthy Lake | Dakota | F | 1 ft | 195 µg/L | 169.5 µg/L |
| 12 | Snyder Lake | Hennepin | NR | - | 190 µg/L | 164 µg/L |
| 13 | Goose Lake | Carver | F | 1.2 ft | 132.5 µg/L | 160.5 µg/L |
| 14 | Otrey Lake | Big Stone | NR | 1 ft | 431 µg/L | 156 µg/L |
| 15 | Barry Lake | Big Stone | NR | 0.8 ft | 348 µg/L | 149 µg/L |
| 16 | Bella Lake | Nobles | NR | 1 ft | 636 µg/L | 145 µg/L |
| 17 | Unnamed Lake | Watonwan | NR | 1 ft | 275 µg/L | 142 µg/L |
| 18 | Saint Johns Lake | Kandiyohi | NR | 0.5 ft | 189 µg/L | 140 µg/L |
| 19 | Hope Lake | Meeker | NR | 2 ft | 167 µg/L | 140 µg/L |
| 20 | Goose Lake | Ramsey | F | 0.7 ft | 173.5 µg/L | 139 µg/L |
| 21 | Hazeltine Lake | Carver | F | 1 ft | 142 µg/L | 136.5 µg/L |
| 22 | Ardmore Lake | Hennepin | F | 1.3 ft | 285 µg/L | 130 µg/L |
| 23 | Augusta Lake | Dakota | F | 0.7 ft | 147.5 µg/L | 130 µg/L |
| 24 | Mud Lake | Hennepin | F | 0.9 ft | 150 µg/L | 123.5 µg/L |
| 25 | Omsrud Lake | Brown | NR | 1 ft | 199 µg/L | 120 µg/L |
| 26 | Titlow Lake | Sibley | F | 0.3 ft | 343 µg/L | 118 µg/L |
| 27 | Rice Lake | Hennepin | F | 2.3 ft | 333.8 µg/L | 117.9 µg/L |
| 28 | Little Rock Lake | Benton | F | 1.8 ft | 156.5 µg/L | 115 µg/L |
| 29 | Unnamed Lake | Grant | NR | 0.7 ft | 269 µg/L | 114 µg/L |
| 30 | Big Woods Lake | Carver | F | 1.5 ft | 197 µg/L | 113 µg/L |
| 31 | Wheeler North Lake | Kandiyohi | F | 1 ft | 294.5 µg/L | 112.5 µg/L |
| 32 | Albion Lake | Wright | F | 1 ft | 105 µg/L | 112 µg/L |
| 33 | West Graham Lake | Nobles | F | 4.1 ft | 182 µg/L | 110.8 µg/L |
| 34 | Loon Lake | Jackson | F | 0.9 ft | 274 µg/L | 110 µg/L |
| 35 | Miller Lake | Carver | F | 1.6 ft | 211 µg/L | 108 µg/L |
| 36 | Lamplighter Park Lake | Hennepin | F | 1.1 ft | 121.5 µg/L | 107.5 µg/L |
| 37 | Shakopee Lake | Chippewa | F | 1.5 ft | 376.5 µg/L | 106.5 µg/L |
| 38 | Unnamed Lake | Swift | NR | 0.7 ft | 224 µg/L | 106 µg/L |
| 39 | Charlotte Lake | Stevens | F | 0.9 ft | 238.5 µg/L | 104.8 µg/L |
| 40 | Benton Lake | Carver | F | 1 ft | 161 µg/L | 104 µg/L |
| 41 | Fish Lake | Becker | F | 1 ft | 136 µg/L | 103.7 µg/L |
| 42 | Cody Lake | Rice | F | 2 ft | 346 µg/L | 103.5 µg/L |
| 43 | Schultz Lake | Kandiyohi | F | 1.3 ft | 189.5 µg/L | 103 µg/L |
| 44 | Phelps Lake | Rice | F | 2.3 ft | 334.5 µg/L | 102.5 µg/L |
| 45 | Pearl Lake | Jackson | F | 1 ft | 153 µg/L | 102.2 µg/L |
| 46 | Spring Lake | Hennepin | F | 3.4 ft | 434 µg/L | 99.1 µg/L |
| 47 | Hanska Lake | Brown | F | 1 ft | 219 µg/L | 98.8 µg/L |
| 48 | Knife Lake | Kanabec | F | 2 ft | 161.5 µg/L | 97.2 µg/L |
| 49 | Foster Lake | Wright | F | 1.6 ft | 179 µg/L | 97 µg/L |
| 50 | Goose Lake | Hennepin | F | 0.8 ft | 132.1 µg/L | 96.5 µg/L |
More Answers for Minnesota
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