1
AHalfmoon Lake
Lincoln County, Wisconsin · 5.5 mi from Spirit River Flowage Lake
- +Two grade letters higher (C → A)
- ++16.5 ft water clarity
- +Lower phosphorus (19.4 vs 49.1 µg/L)
Cleaner Lakes Than Spirit River Flowage Lake
4 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Spirit River Flowage Lake carries a Grade C (Fair) water quality score. Within 30 miles, 4 lakes hold a higher grade. Halfmoon Lake (Lincoln County, Grade A, 5.5 mi away) is the closest meaningful upgrade.
2
AClear Lake
Lincoln County, Wisconsin · 6.5 mi from Spirit River Flowage Lake
- +Two grade letters higher (C → A)
- ++52.5 ft water clarity
- +Lower phosphorus (10.6 vs 49.1 µg/L)
3
BLake Mohawksin
Lincoln County, Wisconsin · 2.1 mi from Spirit River Flowage Lake
- +Higher grade (C → B)
- ++6.5 ft water clarity
- +Lower phosphorus (34.7 vs 49.1 µg/L)
4
BLake Alice
Lincoln County, Wisconsin · 5.3 mi from Spirit River Flowage Lake
- +Higher grade (C → B)
- ++6.5 ft water clarity
- +Lower phosphorus (34.4 vs 49.1 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.