1
ABlue Pit Lake
Cerro Gordo County, Wisconsin · 0.2 mi from Black Pit Lake
- +Two grade letters higher (D → A)
- ++11.5 ft water clarity
Cleaner Lakes Than Black Pit Lake
2 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Black Pit Lake carries a Grade D (Poor) water quality score. Within 30 miles, 2 lakes hold a higher grade. Blue Pit Lake (Cerro Gordo County, Grade A, 0.2 mi away) is the closest meaningful upgrade.
2
BRudd Lake
Floyd County, Wisconsin · 16.8 mi from Black Pit Lake
- +Two grade letters higher (D → B)
- ++2.5 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.