1
AFarewell Lake West Basin; Hanover Township
Jackson County, Wisconsin · 4 mi from Crystal Lake
- +Higher grade (B → A)
- ++2.3 ft water clarity
Cleaner Lakes Than Crystal Lake
2 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Crystal Lake carries a Grade B (Good) water quality score. Within 30 miles, 2 lakes hold a higher grade. Farewell Lake West Basin; Hanover Township (Jackson County, Grade A, 4 mi away) is the closest meaningful upgrade.
2
ADevils Lake Central Basin North
Lenawee County, Wisconsin · 8.4 mi from Crystal Lake
- +Higher grade (B → A)
- ++1.3 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.