1
ATurtle Lake
Walworth County, Wisconsin · 6.3 mi from Comus Lake
- +Two grade letters higher (D → A)
- ++31.2 ft water clarity
- +Lower phosphorus (14.5 vs 193 µg/L)
Cleaner Lakes Than Comus Lake
5 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Comus Lake carries a Grade D (Poor) water quality score. Within 30 miles, 5 lakes hold a higher grade. Turtle Lake (Walworth County, Grade A, 6.3 mi away) is the closest meaningful upgrade.
2
BDelavan Lake
Walworth County, Wisconsin · 2.9 mi from Comus Lake
- +Two grade letters higher (D → B)
- ++19.9 ft water clarity
- +Lower phosphorus (49.5 vs 193 µg/L)
3
BDelavan Lake
Walworth County, Wisconsin · 2.9 mi from Comus Lake
- +Two grade letters higher (D → B)
- ++4.4 ft water clarity
- +Lower phosphorus (26.5 vs 193 µg/L)
4
BDelavan Lake
Walworth County, Wisconsin · 3.6 mi from Comus Lake
- +Two grade letters higher (D → B)
- ++4.1 ft water clarity
- +Lower phosphorus (27 vs 193 µg/L)
5
CDelavan Lake
Walworth County, Wisconsin · 3.3 mi from Comus Lake
- +Higher grade (D → C)
- ++5.1 ft water clarity
- +Lower phosphorus (73 vs 193 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.