1
BLac de L'Est
Les Appalaches County, Québec · 19.2 mi from Lac Joseph
- +Higher grade (C → B)
- ++4.6 ft water clarity
- +Lower phosphorus (9.9 vs 20.7 µg/L)
Cleaner Lakes Than Lac Joseph
4 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.
Lac Joseph carries a Grade C (Fair) water quality score. Within 30 miles, 4 lakes hold a higher grade. Lac de L'Est (Les Appalaches County, Grade B, 19.2 mi away) is the closest meaningful upgrade.
Reviewed by LakeQuality Editorial Team · Updated
2
BPetit Lac Saint-FrançOis
Les Appalaches County, Québec · 19.8 mi from Lac Joseph
- +Higher grade (C → B)
- +Lower phosphorus (14.1 vs 20.7 µg/L)
4
BLac du Huit
Les Appalaches County, Québec · 18 mi from Lac Joseph
- +Higher grade (C → B)
- ++1.7 ft water clarity
- +Lower phosphorus (13.5 vs 20.7 µg/L)
Reading the cohort
4 cleaner lakes sit within 30 miles of Lac Joseph in the EPA water-quality dataset. With that many higher-grade neighbors close by, Lac Joseph's Grade C reflects something specific to the lake itself — not a regional water-quality ceiling. The neighbor list below isn't a small set of marginal upgrades; it's a real cohort of meaningfully cleaner choices for the same Québec weekend.
The nearest cleaner alternative — Lac de L'Est in Les Appalaches County — sits 19.2 miles from Lac Joseph, 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, Lac Joseph 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.