1
ASouth Twin Lake
Polk County, Wisconsin · 1.2 mi from Apple River Flowage Lake
- +Higher grade (B → A)
- ++14.8 ft water clarity
- +Lower phosphorus (11.7 vs 78.5 µg/L)
Cleaner Lakes Than Apple River Flowage Lake
5 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Apple River Flowage Lake carries a Grade B (Good) water quality score. Within 30 miles, 5 lakes hold a higher grade. South Twin Lake (Polk County, Grade A, 1.2 mi away) is the closest meaningful upgrade.
2
AKing Lake
Polk County, Wisconsin · 2.4 mi from Apple River Flowage Lake
- +Higher grade (B → A)
- ++19.7 ft water clarity
- +Lower phosphorus (20.6 vs 78.5 µg/L)
3
ABear Trap Lake
Polk County, Wisconsin · 2.7 mi from Apple River Flowage Lake
- +Higher grade (B → A)
- ++11.5 ft water clarity
- +Lower phosphorus (24.9 vs 78.5 µg/L)
4
BWapogasset Lake
Polk County, Wisconsin · 3.3 mi from Apple River Flowage Lake
- +Higher overall water quality score
- +Lower phosphorus (30.6 vs 78.5 µg/L)
5
BBlack Brook Flowage Lake
Polk County, Wisconsin · 4 mi from Apple River Flowage Lake
- +Higher overall water quality score
- ++2.5 ft water clarity
- +Lower phosphorus (46.6 vs 78.5 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.