1
ABlue Pit Lake
Cerro Gordo County, Wisconsin · 29.5 mi from Crystal Lake Max Depth
- +Two grade letters higher (F → A)
- ++15.5 ft water clarity
Cleaner Lakes Than Crystal Lake Max Depth
3 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Crystal Lake Max Depth carries a Grade F (Very Poor) water quality score. Within 30 miles, 3 lakes hold a higher grade. Blue Pit Lake (Cerro Gordo County, Grade A, 29.5 mi away) is the closest meaningful upgrade.
2
D3
DBlack Pit Lake
Cerro Gordo County, Wisconsin · 29.3 mi from Crystal Lake Max Depth
- +Higher grade (F → D)
- ++4 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.