Is Lac CôMe safe to swim in?

Good for swimming, clear water with low algae levels. Lac CôMe has an overall water quality grade of B. Algae concentration (chlorophyll-a) is 4.4 µg/L. Always check local health department advisories before swimming.

Matawinie County, Québec · Water Quality Report Card

Lac CôMe

Grade B — Good

Mesotrophic

Lac CôMe in Matawinie, Québec received a water quality grade of B (Good). Water clarity: 1.8 m visibility. Phosphorus: 9.5 µg/L. Chlorophyll-a (algae): 4.4 µg/L.

Clarity: 1.8 m
Type: Mesotrophic

Where to stay →Safe to swim?

Lac CôMe is a mesotrophic lake in Matawinie County, Québec. Water quality is graded B based on 3 sampling years through 2025. Compared to the 111 other monitored lakes in Matawinie County, Lac CôMe ranks #93 for water quality.

Source: EPA Water Quality Portal sampling records, MELCCFP, last sampled 2025-08-01. 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: 9.5 µg/L. Chlorophyll-a: 4.4 µg/L. Trophic State Index: 44.

Metric	Value	Grade
Water Clarity (Secchi Depth)	1.8 m	D
Phosphorus	9.5 µg/L	A
Chlorophyll-a (Algae)	4.4 µg/L	A
Trophic State Index (TSI)	44	Mesotrophic

Moderate nutrients, good water quality

Where to stay near Lac CôMe

Compare lakeside cabins, hotels, and vacation rentals near Lac CôMe in Matawinie, 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 CôMe

→ Lac CôMe fishing regulations (limits, seasons, special rules)

Location

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County Ranking

Ranked #93 of 112 lakes in Matawinie

Cleaner Lakes Within 30 Miles

Lac CôMe holds Grade B. 4 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Matawinie

Explore Lac CôMe across LakeGrade

Lake Fishing Forecast

Species activity outlook by water temperature and season

Mesotrophic Lakes

Moderate nutrients, good water quality

The State of Québec's Lakes

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Grade A/B + low algae filter

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Panfish-rich, public access

All Québec lakes

Full state directory

Other Grade B Lakes in Québec

D'Autray · 1.8 m

D'Autray · 2.2 m

D'Autray · 2.7 m

Montcalm · 2.1 m

Montcalm · 2.1 m

Montcalm · 2.8 m

Mesotrophic Lakes in Québec

Lac Sainte-Rose Lac HéNault Lac Maskinongé Lac Mcgill

More records, surveys & data sources

Where this data comes from

Measurements for Lac CôMe 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: 2025-08-01

Monitoring stations:

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