1
AUnion Lake
Polk County, Minnesota · 3.1 mi from Halverson Lake
- +Two grade letters higher (D → A)
- ++11.5 ft water clarity
- +Lower phosphorus (14 vs 51 µg/L)
Cleaner Lakes Than Halverson Lake
5 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Halverson Lake carries a Grade D (Poor) water quality score. Within 30 miles, 5 lakes hold a higher grade. Union Lake (Polk County, Grade A, 3.1 mi away) is the closest meaningful upgrade.
2
BCable Lake
Polk County, Minnesota · 7.3 mi from Halverson Lake
- +Two grade letters higher (D → B)
- ++7.2 ft water clarity
- +Lower phosphorus (20 vs 51 µg/L)
3
BKittleson Lake
Polk County, Minnesota · 5 mi from Halverson Lake
- +Two grade letters higher (D → B)
- ++4.1 ft water clarity
- +Lower phosphorus (26 vs 51 µg/L)
4
BSarah Lake
Polk County, Minnesota · 5.4 mi from Halverson Lake
- +Two grade letters higher (D → B)
- ++4.9 ft water clarity
- +Lower phosphorus (29.5 vs 51 µg/L)
5
BBadger Lake
Polk County, Minnesota · 9.6 mi from Halverson Lake
- +Two grade letters higher (D → B)
- ++3.7 ft water clarity
- +Lower phosphorus (27 vs 51 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.