1
ALoon Lake
Barron County, Wisconsin · 1.7 mi from Crystal Lake
- +Higher grade (B → A)
- ++18.8 ft water clarity
- +Lower phosphorus (18.6 vs 52.5 µg/L)
Cleaner Lakes Than Crystal Lake
5 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Crystal Lake carries a Grade B (Good) water quality score. Within 30 miles, 5 lakes hold a higher grade. Loon Lake (Barron County, Grade A, 1.7 mi away) is the closest meaningful upgrade.
2
AEcho Lake
Barron County, Wisconsin · 3 mi from Crystal Lake
- +Higher grade (B → A)
- ++31.1 ft water clarity
- +Lower phosphorus (14.8 vs 52.5 µg/L)
3
ANorth Lake
Barron County, Wisconsin · 3.1 mi from Crystal Lake
- +Higher grade (B → A)
- ++7.3 ft water clarity
- +Lower phosphorus (22.7 vs 52.5 µg/L)
4
ALong Lake
Polk County, Wisconsin · 3.7 mi from Crystal Lake
- +Higher grade (B → A)
- ++5.7 ft water clarity
- +Lower phosphorus (27.7 vs 52.5 µg/L)
5
AHorseshoe Lake
Polk County, Wisconsin · 4.5 mi from Crystal Lake
- +Higher grade (B → A)
- ++17.2 ft water clarity
- +Lower phosphorus (22.5 vs 52.5 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.