1
AJoe Martin Lake
St. Louis County, Minnesota · 6 mi from East Twin Lake
- +Two grade letters higher (C → A)
- ++33.9 ft water clarity
- +Lower phosphorus (9 vs 34 µg/L)
Cleaner Lakes Than East Twin Lake
5 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
East Twin Lake carries a Grade C (Fair) water quality score. Within 30 miles, 5 lakes hold a higher grade. Joe Martin Lake (St. Louis County, Grade A, 6 mi away) is the closest meaningful upgrade.
2
APat Martin Lake
Carlton County, Minnesota · 2.9 mi from East Twin Lake
- +Two grade letters higher (C → A)
- ++10.8 ft water clarity
- +Lower phosphorus (15 vs 34 µg/L)
3
ALost Lake
St. Louis County, Minnesota · 3.6 mi from East Twin Lake
- +Two grade letters higher (C → A)
- ++12.3 ft water clarity
- +Lower phosphorus (17 vs 34 µg/L)
4
BWest Twin Lake
St. Louis County, Minnesota · 0.7 mi from East Twin Lake
- +Higher grade (C → B)
- ++10.5 ft water clarity
- +Lower phosphorus (16.5 vs 34 µg/L)
5
BSimian Lake
St. Louis County, Minnesota · 2.6 mi from East Twin Lake
- +Higher grade (C → B)
- ++1.7 ft water clarity
- +Lower phosphorus (25 vs 34 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.