1
BAnn Lake
Carver County, Minnesota · 3 mi from Big Woods Lake
- +Two grade letters higher (F → B)
- ++8.2 ft water clarity
- +Lower phosphorus (28 vs 210.5 µg/L)
Cleaner Lakes Than Big Woods Lake
3 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Big Woods Lake carries a Grade F (Very Poor) water quality score. Within 30 miles, 3 lakes hold a higher grade. Ann Lake (Carver County, Grade B, 3 mi away) is the closest meaningful upgrade.
2
CBavaria Lake
Carver County, Minnesota · 1.7 mi from Big Woods Lake
- +Two grade letters higher (F → C)
- ++4.2 ft water clarity
- +Lower phosphorus (33 vs 210.5 µg/L)
3
DGrace Lake
Carver County, Minnesota · 1.3 mi from Big Woods Lake
- +Higher grade (F → D)
- ++1.6 ft water clarity
- +Lower phosphorus (88 vs 210.5 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.