1
AMccraney Lake
Mahnomen County, Minnesota · 2.5 mi from Big Lake
- +Two grade letters higher (D → A)
- ++10 ft water clarity
- +Lower phosphorus (19 vs 33 µg/L)
Cleaner Lakes Than Big Lake
5 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Big Lake carries a Grade D (Poor) water quality score. Within 30 miles, 5 lakes hold a higher grade. Mccraney Lake (Mahnomen County, Grade A, 2.5 mi away) is the closest meaningful upgrade.
2
AWhite Earth Lake
Becker County, Minnesota · 4.3 mi from Big Lake
- +Two grade letters higher (D → A)
- ++12.4 ft water clarity
- +Lower phosphorus (7 vs 33 µg/L)
3
ASouth Twin Lake
Mahnomen County, Minnesota · 5.3 mi from Big Lake
- +Two grade letters higher (D → A)
- ++8.1 ft water clarity
- +Lower phosphorus (14 vs 33 µg/L)
4
BFish Hook Lake
Becker County, Minnesota · 5.3 mi from Big Lake
- +Two grade letters higher (D → B)
- ++7.4 ft water clarity
- +Lower phosphorus (18.5 vs 33 µg/L)
5
BNorth Twin Lake
Mahnomen County, Minnesota · 5.8 mi from Big Lake
- +Two grade letters higher (D → B)
- ++6.4 ft water clarity
- +Lower phosphorus (17 vs 33 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.