1
BNorth Bethany City Reservoir
Harrison County, Wisconsin · 24.7 mi from Crowder S.P. Lake
- +Two grade letters higher (F → B)
- ++9.5 ft water clarity
- +Lower phosphorus (11 vs 110 µg/L)
Cleaner Lakes Than Crowder S.P. Lake
5 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Crowder S.P. Lake carries a Grade F (Very Poor) water quality score. Within 30 miles, 5 lakes hold a higher grade. North Bethany City Reservoir (Harrison County, Grade B, 24.7 mi away) is the closest meaningful upgrade.
2
BLake Marie
Mercer County, Wisconsin · 27.7 mi from Crowder S.P. Lake
- +Two grade letters higher (F → B)
- ++6.8 ft water clarity
- +Lower phosphorus (13 vs 110 µg/L)
3
DIndian Creek Lake
Livingston County, Wisconsin · 13.7 mi from Crowder S.P. Lake
- +Higher grade (F → D)
- ++4.5 ft water clarity
- +Lower phosphorus (80 vs 110 µg/L)
4
D5
DLake Paho
Mercer County, Wisconsin · 21.2 mi from Crowder S.P. Lake
- +Higher grade (F → D)
- ++1.2 ft water clarity
- +Lower phosphorus (37 vs 110 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.