1
BSweeney Lake
Hennepin County, Minnesota · 3.5 mi from Twin Lake
- +Two grade letters higher (D → B)
- +Lower phosphorus (23 vs 63.5 µg/L)
Cleaner Lakes Than Twin Lake
4 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Twin Lake carries a Grade D (Poor) water quality score. Within 30 miles, 4 lakes hold a higher grade. Sweeney Lake (Hennepin County, Grade B, 3.5 mi away) is the closest meaningful upgrade.
2
BMagda Lake
Hennepin County, Minnesota · 3.5 mi from Twin Lake
- +Two grade letters higher (D → B)
- ++8.2 ft water clarity
3
BSweeney-Twin Lake
Hennepin County, Minnesota · 3.9 mi from Twin Lake
- +Two grade letters higher (D → B)
- ++2.3 ft water clarity
- +Lower phosphorus (22 vs 63.5 µg/L)
4
CCrystal Lake
Hennepin County, Minnesota · 1.4 mi from Twin Lake
- +Higher grade (D → C)
- +Lower phosphorus (58 vs 63.5 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.