1
DKinmundy New Lake
Marion County, Wisconsin · 22.1 mi from Vandalia Lake
- +Higher grade (F → D)
- ++1.6 ft water clarity
- +Lower phosphorus (36.5 vs 93 µg/L)
Cleaner Lakes Than Vandalia Lake
2 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Vandalia Lake carries a Grade F (Very Poor) water quality score. Within 30 miles, 2 lakes hold a higher grade. Kinmundy New Lake (Marion County, Grade D, 22.1 mi away) is the closest meaningful upgrade.
2
DSara Lake
Effingham County, Wisconsin · 28.2 mi from Vandalia Lake
- +Higher grade (F → D)
- +Lower phosphorus (48.5 vs 93 µg/L)
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.