1
AMorrison Lake
Clearwater County, Minnesota · 7.5 mi from Johnson Lake
- +Higher grade (B → A)
- ++31.9 ft water clarity
- +Lower phosphorus (13 vs 26 µg/L)
Cleaner Lakes Than Johnson Lake
5 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Johnson Lake carries a Grade B (Good) water quality score. Within 30 miles, 5 lakes hold a higher grade. Morrison Lake (Clearwater County, Grade A, 7.5 mi away) is the closest meaningful upgrade.
2
AFalk Lake
Clearwater County, Minnesota · 2.5 mi from Johnson Lake
- +Higher grade (B → A)
- ++5.8 ft water clarity
- +Lower phosphorus (14 vs 26 µg/L)
3
ABagley Lake
Clearwater County, Minnesota · 5.2 mi from Johnson Lake
- +Higher grade (B → A)
- ++5 ft water clarity
- +Lower phosphorus (19 vs 26 µg/L)
4
AClearwater Lake
Clearwater County, Minnesota · 6.5 mi from Johnson Lake
- +Higher grade (B → A)
- ++2.8 ft water clarity
- +Lower phosphorus (15 vs 26 µg/L)
5
BPeterson Lake
Clearwater County, Minnesota · 5.4 mi from Johnson Lake
- +Higher overall water quality score
- ++4 ft water clarity
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.