1
ASabin Lake
St. Louis County, Minnesota · 4.9 mi from Cedar Island Lake
- +Two grade letters higher (C → A)
- ++31.2 ft water clarity
Cleaner Lakes Than Cedar Island Lake
4 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Cedar Island Lake carries a Grade C (Fair) water quality score. Within 30 miles, 4 lakes hold a higher grade. Sabin Lake (St. Louis County, Grade A, 4.9 mi away) is the closest meaningful upgrade.
2
ADeep Lake
St. Louis County, Minnesota · 6.2 mi from Cedar Island Lake
- +Two grade letters higher (C → A)
- ++13.4 ft water clarity
- +Lower phosphorus (12 vs 21 µg/L)
3
AWhitewater Lake
St. Louis County, Minnesota · 7.8 mi from Cedar Island Lake
- +Two grade letters higher (C → A)
- ++11.6 ft water clarity
- +Lower phosphorus (14 vs 21 µg/L)
4
BWynne Lake
St. Louis County, Minnesota · 4.5 mi from Cedar Island Lake
- +Higher grade (C → B)
- ++3.5 ft water clarity
- +Lower phosphorus (15.5 vs 21 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.