Is Lac de L'Oasis safe to swim in?

Good for swimming, clear water with low algae levels. Lac de L'Oasis has an overall water quality grade of B. Algae concentration (chlorophyll-a) is 2.7 µg/L. Always check local health department advisories before swimming.

Portneuf County, Québec · Water Quality Report Card

Lac de L'Oasis

Grade B — Good

Mesotrophic

Lac de L'Oasis in Portneuf, Québec received a water quality grade of B (Good). Water clarity: 1.8 m visibility. Phosphorus: 12.3 µg/L. Chlorophyll-a (algae): 2.7 µg/L.

Clarity: 1.8 m
Type: Mesotrophic

Where to stay →Safe to swim?

Lac de L'Oasis is a mesotrophic lake in Portneuf County, Québec. Water quality is graded B based on 3 sampling years through 2010. Compared to the 22 other monitored lakes in Portneuf County, Lac de L'Oasis ranks #22 for water quality.

Source: EPA Water Quality Portal sampling records, MELCCFP, last sampled 2010-08-01. Grade methodology: LakeGrade methodology.

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Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Murky, only visible to about 5.9 ft. Phosphorus level: 12.3 µg/L. Chlorophyll-a: 2.7 µg/L. Trophic State Index: 44.

Metric	Value	Grade
Water Clarity (Secchi Depth)	1.8 m	D
Phosphorus	12.3 µg/L	A
Chlorophyll-a (Algae)	2.7 µg/L	A
Trophic State Index (TSI)	44	Mesotrophic

Moderate nutrients, good water quality

Where to stay near Lac de L'Oasis

Compare lakeside cabins, hotels, and vacation rentals near Lac de L'Oasis in Portneuf, Québec — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.

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Fishing Lac de L'Oasis

→ Lac de L'Oasis fishing regulations (limits, seasons, special rules)

Location

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County Ranking

Ranked #22 of 23 lakes in Portneuf

Cleaner Lakes Within 30 Miles

Lac de L'Oasis holds Grade B. 5 nearby lakes hold higher grades.

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Nearby Lakes in Portneuf

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Lake Fishing Forecast

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Mesotrophic Lakes

Moderate nutrients, good water quality

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Other Grade B Lakes in Québec

Mékinac · 2.8 m

Mékinac · 1.2 m

Mékinac · 2.8 m

Mékinac · 2.6 m

Mékinac · 1.9 m

Mékinac · 2 m

Mesotrophic Lakes in Québec

Lac des Pins Lac Froid Lac Charest Lac Trois Milles

More records, surveys & data sources

Where this data comes from

Measurements for Lac de L'Oasis come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.

Data Sources

Water quality data from the EPA Water Quality Portal

Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion

Most recent sample: 2010-08-01

Monitoring stations:

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