1
ALower Hamlin Lake North Central Basin South of the Narrows
Mason County, Wisconsin · 1.6 mi from Upper Hamlin Lake West Basin East of the Narrows
- +Two grade letters higher (C → A)
- ++7 ft water clarity
Cleaner Lakes Than Upper Hamlin Lake West Basin East of the Narrows
2 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Upper Hamlin Lake West Basin East of the Narrows carries a Grade C (Fair) water quality score. Within 30 miles, 2 lakes hold a higher grade. Lower Hamlin Lake North Central Basin South of the Narrows (Mason County, Grade A, 1.6 mi away) is the closest meaningful upgrade.
2
AGun Lake Central Basin; Freesoil Township
Mason County, Wisconsin · 13.4 mi from Upper Hamlin Lake West Basin East of the Narrows
- +Two grade letters higher (C → A)
- ++7.5 ft water clarity
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.