1
ALong Lake
Oconto County, Wisconsin · 2.3 mi from Cooley Lake
- +Higher grade (B → A)
- ++31.2 ft water clarity
- +Lower phosphorus (10.2 vs 39.3 µg/L)
Cleaner Lakes Than Cooley Lake
3 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Cooley Lake carries a Grade B (Good) water quality score. Within 30 miles, 3 lakes hold a higher grade. Long Lake (Oconto County, Grade A, 2.3 mi away) is the closest meaningful upgrade.
2
AKelly Lake
Oconto County, Wisconsin · 2.4 mi from Cooley Lake
- +Higher grade (B → A)
- ++18.1 ft water clarity
- +Lower phosphorus (14.3 vs 39.3 µg/L)
3
ARound Lake
Oconto County, Wisconsin · 2.8 mi from Cooley Lake
- +Higher grade (B → A)
- ++32.8 ft water clarity
- +Lower phosphorus (13.8 vs 39.3 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.