1
DThree Mile Lake
Union County, Wisconsin · 9.1 mi from Mckinley Lake
- +Higher grade (F → D)
- ++1.7 ft water clarity
Cleaner Lakes Than Mckinley Lake
2 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Mckinley Lake carries a Grade F (Very Poor) water quality score. Within 30 miles, 2 lakes hold a higher grade. Three Mile Lake (Union County, Grade D, 9.1 mi away) is the closest meaningful upgrade.
2
DThayer Lake
Union County, Wisconsin · 16.9 mi from Mckinley Lake
- +Higher grade (F → D)
- ++2.5 ft water clarity
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.