1
CArrowhead Lake
Sac County, Wisconsin · 20.9 mi from Swan Lake Max Depth
- +Two grade letters higher (F → C)
- ++4.2 ft water clarity
Cleaner Lakes Than Swan Lake Max Depth
3 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Swan Lake Max Depth carries a Grade F (Very Poor) water quality score. Within 30 miles, 3 lakes hold a higher grade. Arrowhead Lake (Sac County, Grade C, 20.9 mi away) is the closest meaningful upgrade.
2
DYellow Smoke Lake
Crawford County, Wisconsin · 24.9 mi from Swan Lake Max Depth
- +Higher grade (F → D)
- ++1.6 ft water clarity
3
DSpringbrook Lake
Guthrie County, Wisconsin · 26.4 mi from Swan Lake Max Depth
- +Higher grade (F → D)
- ++1.6 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.