1
BLake Nehai Tonkayea
Chariton County, Wisconsin · 29.1 mi from Lake Wooldridge
- +Two grade letters higher (F → B)
- +Lower phosphorus (10 vs 220 µg/L)
Cleaner Lakes Than Lake Wooldridge
5 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Lake Wooldridge carries a Grade F (Very Poor) water quality score. Within 30 miles, 5 lakes hold a higher grade. Lake Nehai Tonkayea (Chariton County, Grade B, 29.1 mi away) is the closest meaningful upgrade.
2
CMarceline City Lake New Nr. Dam
Chariton County, Wisconsin · 29.9 mi from Lake Wooldridge
- +Two grade letters higher (F → C)
- +Lower phosphorus (45.7 vs 220 µg/L)
3
DPeters Lake
Howard County, Wisconsin · 29.6 mi from Lake Wooldridge
- +Higher grade (F → D)
- +Lower phosphorus (54 vs 220 µg/L)
4
FBlind Pony Lake
Saline County, Wisconsin · 18.2 mi from Lake Wooldridge
- +Higher overall water quality score
- +Lower phosphorus (63.7 vs 220 µg/L)
5
FEdwin A Pape Lake
Lafayette County, Wisconsin · 29.5 mi from Lake Wooldridge
- +Higher overall water quality score
- +Lower phosphorus (82 vs 220 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.