1
BNorth Bethany City Reservoir
Harrison County, Wisconsin · 6.5 mi from Harrison County Lake Intake
- +Two grade letters higher (D → B)
- ++8.8 ft water clarity
- +Lower phosphorus (11 vs 66.7 µg/L)
Cleaner Lakes Than Harrison County Lake Intake
2 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Harrison County Lake Intake carries a Grade D (Poor) water quality score. Within 30 miles, 2 lakes hold a higher grade. North Bethany City Reservoir (Harrison County, Grade B, 6.5 mi away) is the closest meaningful upgrade.
2
BLake Marie
Mercer County, Wisconsin · 28.8 mi from Harrison County Lake Intake
- +Two grade letters higher (D → B)
- ++6.1 ft water clarity
- +Lower phosphorus (13 vs 66.7 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.