1
DUnnamed Lake
Big Stone County, Minnesota · 8.8 mi from Big Stone Lake
- +Higher overall water quality score
- ++3 ft water clarity
- +Lower phosphorus (167.5 vs 217 µg/L)
Cleaner Lakes Than Big Stone Lake
2 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Big Stone Lake carries a Grade D (Poor) water quality score. Within 30 miles, 2 lakes hold a higher grade. Unnamed Lake (Big Stone County, Grade D, 8.8 mi away) is the closest meaningful upgrade.
2
D06-0422-00 Lake
Big Stone County, Minnesota · 22.1 mi from Big Stone Lake
- +Higher overall water quality score
- +Lower phosphorus (43 vs 217 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.