1
CBlue Valley Lake
Jackson County, Wisconsin · 4.2 mi from Washington Lake
- +Two grade letters higher (F → C)
Cleaner Lakes Than Washington Lake
3 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Washington Lake carries a Grade F (Very Poor) water quality score. Within 30 miles, 3 lakes hold a higher grade. Blue Valley Lake (Jackson County, Grade C, 4.2 mi away) is the closest meaningful upgrade.
2
DValley Lake
Jackson County, Wisconsin · 1.8 mi from Washington Lake
- +Higher grade (F → D)
- +Lower phosphorus (76.3 vs 96.2 µg/L)
3
FLake of the Woods-Kc
Jackson County, Wisconsin · 6.9 mi from Washington Lake
- +Higher overall water quality score
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.