1
AIsland Lake
Cass County, Minnesota · 4.6 mi from Lower Trelipe Lake
- +Higher grade (B → A)
- ++8.1 ft water clarity
- +Lower phosphorus (12 vs 23 µg/L)
Cleaner Lakes Than Lower Trelipe Lake
5 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Lower Trelipe Lake carries a Grade B (Good) water quality score. Within 30 miles, 5 lakes hold a higher grade. Island Lake (Cass County, Grade A, 4.6 mi away) is the closest meaningful upgrade.
2
AThunder Lake
Cass County, Minnesota · 5.4 mi from Lower Trelipe Lake
- +Higher grade (B → A)
- ++9.5 ft water clarity
- +Lower phosphorus (10 vs 23 µg/L)
3
AUpper Trelipe Lake
Cass County, Minnesota · 2.2 mi from Lower Trelipe Lake
- +Higher grade (B → A)
- ++7.1 ft water clarity
- +Lower phosphorus (11 vs 23 µg/L)
4
AInguadona Lake
Cass County, Minnesota · 3.1 mi from Lower Trelipe Lake
- +Higher grade (B → A)
- ++5.2 ft water clarity
- +Lower phosphorus (15 vs 23 µg/L)
5
BStevens Lake
Cass County, Minnesota · 4.9 mi from Lower Trelipe Lake
- +Higher overall water quality score
- ++3.3 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.