1
AMoose Lake
Wright County, Minnesota · 5.5 mi from Big Swan Lake
- +Two grade letters higher (D → A)
- ++12 ft water clarity
- +Lower phosphorus (12 vs 84 µg/L)
Cleaner Lakes Than Big Swan Lake
5 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Big Swan Lake carries a Grade D (Poor) water quality score. Within 30 miles, 5 lakes hold a higher grade. Moose Lake (Wright County, Grade A, 5.5 mi away) is the closest meaningful upgrade.
2
CLong Lake
Meeker County, Minnesota · 3.4 mi from Big Swan Lake
- +Higher grade (D → C)
- ++5 ft water clarity
- +Lower phosphorus (33.5 vs 84 µg/L)
3
CFrancis Lake
Meeker County, Minnesota · 5.1 mi from Big Swan Lake
- +Higher grade (D → C)
- ++3.5 ft water clarity
- +Lower phosphorus (25 vs 84 µg/L)
4
CMud Lake
Wright County, Minnesota · 6.2 mi from Big Swan Lake
- +Higher grade (D → C)
- ++3.1 ft water clarity
- +Lower phosphorus (28 vs 84 µg/L)
5
CSpring Lake
Meeker County, Minnesota · 4.3 mi from Big Swan Lake
- +Higher grade (D → C)
- ++1.1 ft water clarity
- +Lower phosphorus (47 vs 84 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.