1
DShaokotan Lake
Lincoln County, Minnesota · mi from Split Rock Reservoir
- +Higher grade (F → D)
- ++1.7 ft water clarity
- +Lower phosphorus (51.5 vs 241 µg/L)
Cleaner Lakes Than Split Rock Reservoir
2 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Split Rock Reservoir carries a Grade F (Very Poor) water quality score. Within 30 miles, 2 lakes hold a higher grade. Shaokotan Lake (Lincoln County, Grade D, null mi away) is the closest meaningful upgrade.
2
DHawksnest Lake
Lincoln County, Minnesota · mi from Split Rock Reservoir
- +Higher grade (F → D)
- ++5.3 ft water clarity
- +Lower phosphorus (213 vs 241 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.