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LakeQuality

Cleaner Lakes Than Long Lake South Central Basin

1 higher-graded lake within 30 miles, ranked by grade improvement and proximity.

Long Lake South Central Basin carries a Grade B (Good) water quality score. Within 30 miles, 1 lake holds a higher grade. Lmj-13 Lake (Cass County, Grade A, 1.1 mi away) is the closest meaningful upgrade.

1
A

Lmj-13 Lake

Cass County, Wisconsin · 1.1 mi from Long Lake South Central Basin
  • +Higher grade (B → A)

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.

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