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BLake Nehai Tonkayea
Chariton County, Wisconsin · 16 mi from Brookfield Lake
- +Higher overall water quality score
- ++3.6 ft water clarity
- +Lower phosphorus (10 vs 19.7 µg/L)
Cleaner Lakes Than Brookfield Lake
1 higher-graded lake within 30 miles, ranked by grade improvement and proximity.
Brookfield Lake carries a Grade B (Good) water quality score. Within 30 miles, 1 lake holds a higher grade. Lake Nehai Tonkayea (Chariton County, Grade B, 16 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.