1
BObs-06 Lake
Harrison County, Wisconsin · 17 mi from Obs-09 Lake
- +Two grade letters higher (D → B)
- ++4.9 ft water clarity
Cleaner Lakes Than Obs-09 Lake
5 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Obs-09 Lake carries a Grade D (Poor) water quality score. Within 30 miles, 5 lakes hold a higher grade. Obs-06 Lake (Harrison County, Grade B, 17 mi away) is the closest meaningful upgrade.
2
BWpa-01 Lake
Orange County, Wisconsin · 22.8 mi from Obs-09 Lake
- +Two grade letters higher (D → B)
- ++3.7 ft water clarity
3
BOsk-07 Lake
Clark County, Wisconsin · 29.4 mi from Obs-09 Lake
- +Two grade letters higher (D → B)
- ++5.6 ft water clarity
4
COlp-03 Lake
Perry County, Wisconsin · 18.7 mi from Obs-09 Lake
- +Higher grade (D → C)
- ++8.8 ft water clarity
5
CWpa-03 Lake
Dubois County, Wisconsin · 29.5 mi from Obs-09 Lake
- +Higher grade (D → C)
- ++5.2 ft water clarity
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.