1
COld Reservoir
Randolph County, Wisconsin · 2.7 mi from Cedar Lake
- +Higher grade (D → C)
- +Lower phosphorus (33 vs 51.8 µg/L)
Cleaner Lakes Than Cedar Lake
3 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Cedar Lake carries a Grade D (Poor) water quality score. Within 30 miles, 3 lakes hold a higher grade. Old Reservoir (Randolph County, Grade C, 2.7 mi away) is the closest meaningful upgrade.
2
CRothwell Lake
Randolph County, Wisconsin · 2.7 mi from Cedar Lake
- +Higher grade (D → C)
- +Lower phosphorus (32 vs 51.8 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.