1
AWed-01 Lake
Henry County, Wisconsin · 21.1 mi from Gmw-04 Lake
- +Two grade letters higher (F → A)
- ++11.4 ft water clarity
Cleaner Lakes Than Gmw-04 Lake
3 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Gmw-04 Lake carries a Grade F (Very Poor) water quality score. Within 30 miles, 3 lakes hold a higher grade. Wed-01 Lake (Henry County, Grade A, 21.1 mi away) is the closest meaningful upgrade.
2
CWed-01 Lake
Henry County, Wisconsin · 16.6 mi from Gmw-04 Lake
- +Two grade letters higher (F → C)
- ++2.8 ft water clarity
3
CGmw-07 Lake
Franklin County, Wisconsin · 18.9 mi from Gmw-04 Lake
- +Two grade letters higher (F → C)
- ++1.7 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.