1
ACharlotte Lake
Wright County, Minnesota · 4.2 mi from Schwappauf Lake
- +Two grade letters higher (D → A)
- ++12.7 ft water clarity
- +Lower phosphorus (12.5 vs 65.1 µg/L)
Cleaner Lakes Than Schwappauf Lake
2 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Schwappauf Lake carries a Grade D (Poor) water quality score. Within 30 miles, 2 lakes hold a higher grade. Charlotte Lake (Wright County, Grade A, 4.2 mi away) is the closest meaningful upgrade.
2
CRebecca Lake
Hennepin County, Minnesota · 4.8 mi from Schwappauf Lake
- +Higher grade (D → C)
- +Lower phosphorus (44.9 vs 65.1 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.