1
CMark Twain Lake Indian Creek Arm
Ralls County, Wisconsin · 14.6 mi from Hunnewell Lake
- +Higher grade (D → C)
Cleaner Lakes Than Hunnewell Lake
3 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Hunnewell Lake carries a Grade D (Poor) water quality score. Within 30 miles, 3 lakes hold a higher grade. Mark Twain Lake Indian Creek Arm (Ralls County, Grade C, 14.6 mi away) is the closest meaningful upgrade.
3
CHow 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.