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ABig Marine Lake
Washington County, Minnesota · 7.4 mi from Clear Lake
- +Two grade letters higher (C → A)
- ++5.3 ft water clarity
- +Lower phosphorus (14.5 vs 33 µg/L)
Cleaner Lakes Than Clear Lake
2 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Clear Lake carries a Grade C (Fair) water quality score. Within 30 miles, 2 lakes hold a higher grade. Big Marine Lake (Washington County, Grade A, 7.4 mi away) is the closest meaningful upgrade.
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.