1
DWellner-Hageman Reservoir
Brown County, Minnesota · mi from Unnamed Lake
- +Higher grade (F → D)
- ++3.4 ft water clarity
- +Lower phosphorus (45 vs 1300 µg/L)
Cleaner Lakes Than Unnamed Lake
3 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Unnamed Lake carries a Grade F (Very Poor) water quality score. Within 30 miles, 3 lakes hold a higher grade. Wellner-Hageman Reservoir (Brown County, Grade D, null mi away) is the closest meaningful upgrade.
2
DSleepy Eye Lake
Brown County, Minnesota · mi from Unnamed Lake
- +Higher grade (F → D)
- ++3 ft water clarity
- +Lower phosphorus (39.5 vs 1300 µg/L)
3
FPreston Lake
Renville County, Minnesota · mi from Unnamed Lake
- +Higher overall water quality score
- ++4.7 ft water clarity
- +Lower phosphorus (222 vs 1300 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.