1
ASouth Twin Lake
Mahnomen County, Minnesota · 3 mi from Sargent Lake
- +Higher grade (B → A)
- ++1.3 ft water clarity
Cleaner Lakes Than Sargent Lake
4 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Sargent Lake carries a Grade B (Good) water quality score. Within 30 miles, 4 lakes hold a higher grade. South Twin Lake (Mahnomen County, Grade A, 3 mi away) is the closest meaningful upgrade.
2
ABass Lake
Mahnomen County, Minnesota · 5 mi from Sargent Lake
- +Higher grade (B → A)
- ++4.2 ft water clarity
- +Lower phosphorus (10 vs 16 µg/L)
3
ANorris Lake
Mahnomen County, Minnesota · 5.9 mi from Sargent Lake
- +Higher grade (B → A)
- ++2.7 ft water clarity
4
AMccraney Lake
Mahnomen County, Minnesota · 6.9 mi from Sargent Lake
- +Higher grade (B → A)
- ++3.2 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.