1
ALittle Spider Lake
Vilas County, Wisconsin · 2.8 mi from Mann Lake
- +Higher grade (B → A)
- ++31.2 ft water clarity
- +Lower phosphorus (11.5 vs 33.8 µg/L)
Cleaner Lakes Than Mann Lake
4 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Mann Lake carries a Grade B (Good) water quality score. Within 30 miles, 4 lakes hold a higher grade. Little Spider Lake (Vilas County, Grade A, 2.8 mi away) is the closest meaningful upgrade.
2
AAllequash Lake
Vilas County, Wisconsin · 3.3 mi from Mann Lake
- +Higher grade (B → A)
- ++5.5 ft water clarity
- +Lower phosphorus (12.3 vs 33.8 µg/L)
3
ALittle John Jr Lake
Vilas County, Wisconsin · 1.4 mi from Mann Lake
- +Higher grade (B → A)
- ++11.5 ft water clarity
- +Lower phosphorus (26.2 vs 33.8 µg/L)
4
ABig Arbor Vitae Lake
Vilas County, Wisconsin · 4.1 mi from Mann Lake
- +Higher grade (B → A)
- +Lower phosphorus (24.1 vs 33.8 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.