Ml-Peterson Lake
- +Higher overall water quality score
1 higher-graded lake within 30 miles, ranked by grade improvement and proximity.
Ml-Se Lake carries a Grade B (Good) water quality score. Within 30 miles, 1 lake holds a higher grade. Ml-Peterson Lake (Mille Lacs County, Grade B, null mi away) is the closest meaningful upgrade.
Just one nearby water body scores higher than Ml-Se Lake on the EPA metrics within a 30-mile radius. The single cleaner option (below) is the practical alternative; beyond that, the next-cleanest lakes sit farther out and warrant a longer drive only if the water-quality difference is the deciding factor.
The closest cleaner alternative — Ml-Peterson Lake in Mille Lacs County, Grade B — sits miles from Ml-Se Lake. At that distance, the substitution cost is essentially zero: same drive time, same regional access, demonstrably cleaner water on the EPA indicators. For repeat visitors who care about clarity or phosphorus levels, swapping the routine to Ml-Peterson Lake is mostly a habit change rather than a logistics change.
The EPA water-quality grading combines clarity (Secchi depth), phosphorus, and chlorophyll-a measurements from state environmental sampling. A higher letter grade reflects measurably cleaner water on those indicators, not subjective beauty or access quality — a Grade A lake might have worse boat-launch facilities or shoreline access than a Grade C neighbor, so the ranking is one input alongside the rest of trip planning. See the methodology page for the full grading formula.
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.