1
AGreen Water Lake
Becker County, Minnesota · 4.5 mi from Island Lake
- +Higher grade (B → A)
- +Lower phosphorus (14 vs 20 µg/L)
Cleaner Lakes Than Island Lake
3 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Island Lake carries a Grade B (Good) water quality score. Within 30 miles, 3 lakes hold a higher grade. Green Water Lake (Becker County, Grade A, 4.5 mi away) is the closest meaningful upgrade.
2
ATea Cracker Lake
Becker County, Minnesota · 5.2 mi from Island Lake
- +Higher grade (B → A)
- +Lower phosphorus (13.5 vs 20 µg/L)
3
ABass Lake
Becker County, Minnesota · 5.6 mi from Island Lake
- +Higher grade (B → A)
- +Lower phosphorus (13 vs 20 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.