1
ALake Wauwanoka Nr. Dam
Jefferson County, Wisconsin · 9.9 mi from Cedar Hill Lake 1
- +Two grade letters higher (D → A)
- ++10.3 ft water clarity
- +Lower phosphorus (8 vs 54.3 µg/L)
Cleaner Lakes Than Cedar Hill Lake 1
5 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Cedar Hill Lake 1 carries a Grade D (Poor) water quality score. Within 30 miles, 5 lakes hold a higher grade. Lake Wauwanoka Nr. Dam (Jefferson County, Grade A, 9.9 mi away) is the closest meaningful upgrade.
2
ACattails 2 Lake
Jefferson County, Wisconsin · 9.2 mi from Cedar Hill Lake 1
- +Two grade letters higher (D → A)
- +Lower phosphorus (24 vs 54.3 µg/L)
3
BCattails 1 Lake
Jefferson County, Wisconsin · 9.4 mi from Cedar Hill Lake 1
- +Two grade letters higher (D → B)
- ++3.7 ft water clarity
- +Lower phosphorus (16 vs 54.3 µg/L)
4
BMarion Reservoir
Franklin County, Wisconsin · 6 mi from Cedar Hill Lake 1
- +Two grade letters higher (D → B)
- ++3.3 ft water clarity
- +Lower phosphorus (16 vs 54.3 µg/L)
5
CLake Tishomingo Nr. Dam
Jefferson County, Wisconsin · 3.1 mi from Cedar Hill Lake 1
- +Higher grade (D → C)
- ++2.8 ft water clarity
- +Lower phosphorus (23.5 vs 54.3 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.