1
ALittle Long Lake
Hennepin County, Minnesota · 1.1 mi from Whaletail Lake
- +Two grade letters higher (D → A)
- ++15.7 ft water clarity
- +Lower phosphorus (21.3 vs 47.6 µg/L)
Cleaner Lakes Than Whaletail Lake
3 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Whaletail Lake carries a Grade D (Poor) water quality score. Within 30 miles, 3 lakes hold a higher grade. Little Long Lake (Hennepin County, Grade A, 1.1 mi away) is the closest meaningful upgrade.
2
BZumbra-Sunny Lake
Carver County, Minnesota · 4.3 mi from Whaletail Lake
- +Two grade letters higher (D → B)
- ++6.8 ft water clarity
- +Lower phosphorus (26.5 vs 47.6 µg/L)
3
COak Lake
Carver County, Minnesota · 4.1 mi from Whaletail Lake
- +Higher grade (D → C)
- ++1.2 ft water clarity
- +Lower phosphorus (42.5 vs 47.6 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.