1
AOasis Ranch Lake
Audrain County, Wisconsin · 13.6 mi from Vandalia Community Lake
- +Two grade letters higher (F → A)
- ++12.3 ft water clarity
- +Lower phosphorus (8 vs 110 µg/L)
Cleaner Lakes Than Vandalia Community Lake
5 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Vandalia Community Lake carries a Grade F (Very Poor) water quality score. Within 30 miles, 5 lakes hold a higher grade. Oasis Ranch Lake (Audrain County, Grade A, 13.6 mi away) is the closest meaningful upgrade.
2
AOasis Ranch Upper Lake
Audrain County, Wisconsin · 13.6 mi from Vandalia Community Lake
- +Two grade letters higher (F → A)
- ++12.6 ft water clarity
- +Lower phosphorus (12 vs 110 µg/L)
3
CBowling Green Lake
Pike County, Wisconsin · 21.8 mi from Vandalia Community Lake
- +Two grade letters higher (F → C)
- ++3.7 ft water clarity
- +Lower phosphorus (24.6 vs 110 µg/L)
4
CMark Twain Lake by Hwy J
Ralls County, Wisconsin · 20.5 mi from Vandalia Community Lake
- +Two grade letters higher (F → C)
- ++1.9 ft water clarity
- +Lower phosphorus (33.6 vs 110 µg/L)
5
DMark Twain Lake
Ralls County, Wisconsin · 20.6 mi from Vandalia Community Lake
- +Higher grade (F → D)
- +Lower phosphorus (60.8 vs 110 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.