1
AClear Lake East Basin; Waterloo Township
Jackson County, Wisconsin · 1.7 mi from Sugarloaf Lake; Lyndon Twp
- +Higher grade (B → A)
Cleaner Lakes Than Sugarloaf Lake; Lyndon Twp
3 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Sugarloaf Lake; Lyndon Twp carries a Grade B (Good) water quality score. Within 30 miles, 3 lakes hold a higher grade. Clear Lake East Basin; Waterloo Township (Jackson County, Grade A, 1.7 mi away) is the closest meaningful upgrade.
2
ANorth Lake North Central Basin; Dexter Township
Washtenaw County, Wisconsin · 6.5 mi from Sugarloaf Lake; Lyndon Twp
- +Higher grade (B → A)
- ++2.5 ft water clarity
3
ASilver Lake
Washtenaw County, Wisconsin · 9.6 mi from Sugarloaf Lake; Lyndon Twp
- +Higher grade (B → A)
- ++2 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.