1
BCrystal-Morgan Lake
Morgan County, Wisconsin · 15.6 mi from Manito Lake by Dam
- +Two grade letters higher (D → B)
- ++3.7 ft water clarity
- +Lower phosphorus (15.5 vs 62 µg/L)
Cleaner Lakes Than Manito Lake by Dam
5 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Manito Lake by Dam carries a Grade D (Poor) water quality score. Within 30 miles, 5 lakes hold a higher grade. Crystal-Morgan Lake (Morgan County, Grade B, 15.6 mi away) is the closest meaningful upgrade.
2
BGrav Arm 2 Lake
Morgan County, Wisconsin · 20.2 mi from Manito Lake by Dam
- +Two grade letters higher (D → B)
- ++4.5 ft water clarity
- +Lower phosphorus (22 vs 62 µg/L)
3
CGrav Arm 1 Lake
Morgan County, Wisconsin · 19.1 mi from Manito Lake by Dam
- +Higher grade (D → C)
- ++3.5 ft water clarity
- +Lower phosphorus (27 vs 62 µg/L)
4
CLoto Lake
Morgan County, Wisconsin · 20.2 mi from Manito Lake by Dam
- +Higher grade (D → C)
- ++1.6 ft water clarity
- +Lower phosphorus (22 vs 62 µg/L)
5
CGrav If 4 Lake
Morgan County, Wisconsin · 20 mi from Manito Lake by Dam
- +Higher grade (D → C)
- ++1.7 ft water clarity
- +Lower phosphorus (31 vs 62 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.