1
AFreedom Lakes
Polk County, Wisconsin · 1.8 mi from Long Trade Lake
- +Two grade letters higher (C → A)
- ++21.4 ft water clarity
- +Lower phosphorus (19.9 vs 87.6 µg/L)
Cleaner Lakes Than Long Trade Lake
5 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Long Trade Lake carries a Grade C (Fair) water quality score. Within 30 miles, 5 lakes hold a higher grade. Freedom Lakes (Polk County, Grade A, 1.8 mi away) is the closest meaningful upgrade.
2
ASandhill Lake
Polk County, Wisconsin · 4.4 mi from Long Trade Lake
- +Two grade letters higher (C → A)
- ++17.3 ft water clarity
- +Lower phosphorus (19.2 vs 87.6 µg/L)
3
ABig Trade Lake
Burnett County, Wisconsin · 3.4 mi from Long Trade Lake
- +Two grade letters higher (C → A)
- ++6.6 ft water clarity
- +Lower phosphorus (28.9 vs 87.6 µg/L)
4
BRound Lake
Burnett County, Wisconsin · 2.8 mi from Long Trade Lake
- +Higher grade (C → B)
- ++6.6 ft water clarity
- +Lower phosphorus (41.4 vs 87.6 µg/L)
5
BLittle Trade Lake
Burnett County, Wisconsin · 3.9 mi from Long Trade Lake
- +Higher grade (C → B)
- ++1.7 ft water clarity
- +Lower phosphorus (50 vs 87.6 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.