Lac Coulonge Lake
Pontiac, OntarioView mapDirections
Ontario MECP publishes the water-quality measurements for Lac Coulonge Lake. Here is what has been measured.
- Limited data
Lac Coulonge Lake in Pontiac, Ontario has water-quality measurements published by Ontario MECP, shown here as reported. Water clarity: 1.6 m visibility.
Lac Coulonge Lake is a lake in Pontiac County, Ontario.
Source: Ontario open-data programmes (Lake Partner Program and Broad-scale Monitoring) — not the EPA Water Quality Portal, last sampled 2019-05-15. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Lac Coulonge Lake is safe to swim in today is a call for the Ontario Ministry of the Environment, Conservation and Parks and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Lac Coulonge Lake
These are the measurements Ontario MECP publishes for Lac Coulonge Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 5.2 ft. TSI 53.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 1.6m | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 53 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Lac Coulonge Lake
Answers come straight from the public measurements and survey records on this page.
Stays via Stay22
Stays near Lac Coulonge Lake
Compare lakeside cabins, hotels, and vacation rentals near Lac Coulonge Lake in Pontiac, Ontario — 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.
Top-rated places to stay near Lac Coulonge Lake
Prices for Oct 30–Nov 1, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Follow Lac Coulonge Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Lac Coulonge Lake
Nearby Lakes in Pontiac
Frequently asked questions about Lac Coulonge Lake
Where is Lac Coulonge Lake?
- Lac Coulonge Lake is a lake in Pontiac, Ontario. Its water-quality measurements are published by Ontario MECP and shown on this page as reported.
What is the water quality of Lac Coulonge Lake?
- Lac Coulonge Lake in Pontiac, Ontario has water-quality measurements published by Ontario MECP, shown here as reported. Water clarity: 1.6 m visibility.
Is Lac Coulonge Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Lac Coulonge Lake across LakeQuality
More lakes in Ontario
Other Lakes in Ontario
Eutrophic Lakes in Ontario
Where this data comes from
Measurements for Lac Coulonge Lake come from Ontario open-data programmes (Lake Partner Program and Broad-scale Monitoring), not the EPA Water Quality Portal. Per-sample source details are not recorded for this lake. Contains information licensed under the Open Government Licence – Ontario. See data sources.