1
BGrand Calumet Lagoon Lake
Lake County, Wisconsin · 19.2 mi from Umk-13 Lake
- +Two grade letters higher (D → B)
Cleaner Lakes Than Umk-13 Lake
3 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Umk-13 Lake carries a Grade D (Poor) water quality score. Within 30 miles, 3 lakes hold a higher grade. Grand Calumet Lagoon Lake (Lake County, Grade B, 19.2 mi away) is the closest meaningful upgrade.
2
BLmg-05 Lake
Lake County, Wisconsin · 3.6 mi from Umk-13 Lake
- +Two grade letters higher (D → B)
- ++2.9 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.