1
CMoore Lake
Anoka County, Minnesota · 1.7 mi from Locke Lake
- +Two grade letters higher (F → C)
- +Lower phosphorus (39 vs 107 µg/L)
Cleaner Lakes Than Locke Lake
5 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Locke Lake carries a Grade F (Very Poor) water quality score. Within 30 miles, 5 lakes hold a higher grade. Moore Lake (Anoka County, Grade C, 1.7 mi away) is the closest meaningful upgrade.
2
CSpring Lake
Ramsey County, Minnesota · 2.6 mi from Locke Lake
- +Two grade letters higher (F → C)
- +Lower phosphorus (58 vs 107 µg/L)
3
CSouth Long Lake
Ramsey County, Minnesota · 3.8 mi from Locke Lake
- +Two grade letters higher (F → C)
- ++1.3 ft water clarity
- +Lower phosphorus (45 vs 107 µg/L)
4
DSilver Lake
Ramsey County, Minnesota · 4 mi from Locke Lake
- +Higher grade (F → D)
- +Lower phosphorus (77.5 vs 107 µg/L)
5
DSandy Lake
Anoka County, Minnesota · 2.2 mi from Locke Lake
- +Higher grade (F → D)
- +Lower phosphorus (76 vs 107 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.