1
BSchool Section Lake
Stearns County, Minnesota · 2.1 mi from Louisa Lake
- +Higher grade (C → B)
- ++4.6 ft water clarity
- +Lower phosphorus (14 vs 55 µg/L)
Cleaner Lakes Than Louisa Lake
3 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Louisa Lake carries a Grade C (Fair) water quality score. Within 30 miles, 3 lakes hold a higher grade. School Section Lake (Stearns County, Grade B, 2.1 mi away) is the closest meaningful upgrade.
2
CAugusta Lake
Stearns County, Minnesota · 3.7 mi from Louisa Lake
- +Higher overall water quality score
- +Lower phosphorus (25 vs 55 µg/L)
3
CUnion Lake
Wright County, Minnesota · 4 mi from Louisa Lake
- +Higher overall water quality score
- +Lower phosphorus (20.5 vs 55 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.