1
AHalfmoon Lake
Oconto County, Wisconsin · 0.9 mi from Yankee Lake
- +Higher grade (B → A)
- ++42.7 ft water clarity
- +Lower phosphorus (11.8 vs 26.5 µg/L)
Cleaner Lakes Than Yankee Lake
5 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Yankee Lake carries a Grade B (Good) water quality score. Within 30 miles, 5 lakes hold a higher grade. Halfmoon Lake (Oconto County, Grade A, 0.9 mi away) is the closest meaningful upgrade.
2
ARanch Lake
Oconto County, Wisconsin · 1.5 mi from Yankee Lake
- +Higher grade (B → A)
- ++32.9 ft water clarity
- +Lower phosphorus (14.4 vs 26.5 µg/L)
3
AGilas Lake
Marinette County, Wisconsin · 2.4 mi from Yankee Lake
- +Higher grade (B → A)
- ++37.8 ft water clarity
- +Lower phosphorus (12.6 vs 26.5 µg/L)
4
AWhite Potato Lake
Oconto County, Wisconsin · 3.5 mi from Yankee Lake
- +Higher grade (B → A)
- ++12.8 ft water clarity
- +Lower phosphorus (17 vs 26.5 µg/L)
5
AThunder Lake
Marinette County, Wisconsin · 5 mi from Yankee Lake
- +Higher grade (B → A)
- ++47.6 ft water clarity
- +Lower phosphorus (10.3 vs 26.5 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.