1
AWind Lake
Polk County, Wisconsin · 0.7 mi from Mud Lake
- +Two grade letters higher (D → A)
- ++26.2 ft water clarity
- +Lower phosphorus (17.2 vs 93 µg/L)
Cleaner Lakes Than Mud Lake
5 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Mud Lake carries a Grade D (Poor) water quality score. Within 30 miles, 5 lakes hold a higher grade. Wind Lake (Polk County, Grade A, 0.7 mi away) is the closest meaningful upgrade.
2
AChurch Pine Lake
Polk County, Wisconsin · 1.2 mi from Mud Lake
- +Two grade letters higher (D → A)
- ++36.1 ft water clarity
- +Lower phosphorus (13.5 vs 93 µg/L)
3
APine Lake
Polk County, Wisconsin · 2.8 mi from Mud Lake
- +Two grade letters higher (D → A)
- ++36.1 ft water clarity
- +Lower phosphorus (13.5 vs 93 µg/L)
4
APaulsen Lake
Polk County, Wisconsin · 2.9 mi from Mud Lake
- +Two grade letters higher (D → A)
- ++32.8 ft water clarity
- +Lower phosphorus (12.7 vs 93 µg/L)
5
ABig Lake
Polk County, Wisconsin · 0.7 mi from Mud Lake
- +Two grade letters higher (D → A)
- ++22.9 ft water clarity
- +Lower phosphorus (21.6 vs 93 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.