1
ADeer Lake
Polk County, Wisconsin · 2.7 mi from Mud Lake
- +Two grade letters higher (C → A)
- ++32.4 ft water clarity
- +Lower phosphorus (16.9 vs 129 µg/L)
Cleaner Lakes Than Mud Lake
4 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Mud Lake carries a Grade C (Fair) water quality score. Within 30 miles, 4 lakes hold a higher grade. Deer Lake (Polk County, Grade A, 2.7 mi away) is the closest meaningful upgrade.
2
ALoveless Lake
Polk County, Wisconsin · 3.9 mi from Mud Lake
- +Two grade letters higher (C → A)
- ++10.3 ft water clarity
- +Lower phosphorus (28.9 vs 129 µg/L)
3
BLittle Bass Lake
Polk County, Wisconsin · 3.2 mi from Mud Lake
- +Higher grade (C → B)
- ++1.2 ft water clarity
- +Lower phosphorus (37.8 vs 129 µg/L)
4
BWapogasset Lake
Polk County, Wisconsin · 5.2 mi from Mud Lake
- +Higher grade (C → B)
- ++2.1 ft water clarity
- +Lower phosphorus (30.6 vs 129 µg/L)
How this list is built
Every lake on LakeQuality has a calculated grade from EPA Water Quality Portal samples — secchi depth, total phosphorus, and chlorophyll-a measured against Metropolitan Council thresholds. To suggest cleaner alternatives, we filter lakes within 30 miles to those with a strictly higher numeric score, then rank by grade improvement with a small proximity tiebreak. Cross-state and limited-data lakes are excluded so the list stays locally relevant.