1
ALong Lake
Clearwater County, Minnesota · 4.6 mi from Rockstad Lake
- +Two grade letters higher (C → A)
- ++16 ft water clarity
- +Lower phosphorus (7 vs 48 µg/L)
Cleaner Lakes Than Rockstad Lake
5 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Rockstad Lake carries a Grade C (Fair) water quality score. Within 30 miles, 5 lakes hold a higher grade. Long Lake (Clearwater County, Grade A, 4.6 mi away) is the closest meaningful upgrade.
2
AWaptus Lake
Clearwater County, Minnesota · 3.6 mi from Rockstad Lake
- +Two grade letters higher (C → A)
- ++10.1 ft water clarity
- +Lower phosphorus (15 vs 48 µg/L)
3
AMckenzie Lake
Clearwater County, Minnesota · 5.1 mi from Rockstad Lake
- +Two grade letters higher (C → A)
- ++8.6 ft water clarity
- +Lower phosphorus (13 vs 48 µg/L)
4
AIsland Lake
Clearwater County, Minnesota · 5.4 mi from Rockstad Lake
- +Two grade letters higher (C → A)
- ++10.1 ft water clarity
- +Lower phosphorus (15 vs 48 µg/L)
5
ACesar Lake
Clearwater County, Minnesota · 6.6 mi from Rockstad Lake
- +Two grade letters higher (C → A)
- ++7.2 ft water clarity
- +Lower phosphorus (17.5 vs 48 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.