1
AMargaret Lake
Polk County, Wisconsin · 5.2 mi from Largon Lake
- +Two grade letters higher (C → A)
- ++42.7 ft water clarity
- +Lower phosphorus (10.8 vs 55.8 µg/L)
Cleaner Lakes Than Largon Lake
5 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Largon Lake carries a Grade C (Fair) water quality score. Within 30 miles, 5 lakes hold a higher grade. Margaret Lake (Polk County, Grade A, 5.2 mi away) is the closest meaningful upgrade.
2
AHorseshoe Lake
Barron County, Wisconsin · 5.3 mi from Largon Lake
- +Two grade letters higher (C → A)
- ++16.8 ft water clarity
- +Lower phosphorus (19.2 vs 55.8 µg/L)
3
ACrescent Lake
Polk County, Wisconsin · 5.5 mi from Largon Lake
- +Two grade letters higher (C → A)
- ++18 ft water clarity
- +Lower phosphorus (17.4 vs 55.8 µg/L)
4
AEmber Lake
Polk County, Wisconsin · 2.1 mi from Largon Lake
- +Two grade letters higher (C → A)
- ++18.9 ft water clarity
- +Lower phosphorus (20.2 vs 55.8 µg/L)
5
ASand Lake
Barron County, Wisconsin · 5 mi from Largon Lake
- +Two grade letters higher (C → A)
- ++34.5 ft water clarity
- +Lower phosphorus (20 vs 55.8 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.