Cleaner Lakes Than Lake Irvine
3 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Lake Irvine carries a Grade D (Poor) water quality score. Within 30 miles, 3 lakes hold a higher grade. Devils Lake (Benson County, Grade C, 17.4 mi away) is the closest meaningful upgrade.
Devils Lake
- +Higher grade (D → C)
- ++2.3 ft water clarity
Pelican Lake
- +Higher overall water quality score
Reading the cohort
Within 30 miles of Lake Irvine, 3 lakes score higher on EPA water-quality metrics than its Grade D. The short list means the alternatives are real upgrades but not interchangeable — each carries its own access, size, and species mix worth checking before substituting it into a weekend plan.
The nearest cleaner alternative — Devils Lake in Benson County — sits 17.4 miles from Lake Irvine, putting it firmly in "destination trip" rather than "neighborhood swap" range. The water-quality gap has to be the deciding factor; for a casual outing, Lake Irvine is the practical choice and the cleaner options are reserved for purpose-specific visits.
The EPA water-quality grading combines clarity (Secchi depth), phosphorus, and chlorophyll-a measurements from state environmental sampling. A higher letter grade reflects measurably cleaner water on those indicators, not subjective beauty or access quality — a Grade A lake might have worse boat-launch facilities or shoreline access than a Grade C neighbor, so the ranking is one input alongside the rest of trip planning. See the methodology page for the full grading formula.
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.