Pontiac County Lake Quality

Québec, 18 lakes, average grade A (Excellent)

There are 18 graded lakes in Pontiac County. The mix is varied enough that the county-level average tells you the broad strokes, not the choose-this-cabin specifics. The county's average grade is A — among the cleanest in Québec. 15 lakes pull an A on their own, and almost none fall into the D or F brackets.

Most of the county's monitored lakes are shallow — under 50 feet — which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed. Lac Hughes (A) is the cleanest in the county.

Loading map…

Quick Answers for Pontiac County

Cleanest lakes in Pontiac County →Cleanest lakes in Québec →Safest swimming lakes in Québec →

Planning a trip? Check special fishing regulations for Lac Hughes — or check the official Québec fishing regulations.

All Lakes in Pontiac County

Rank	Lake	Grade	Clarity	Phosphorus
1	Lac Hughes	A	15.9 ft	4 µg/L
2	Petit Lac Hughes	A	19.5 ft	3.4 µg/L
3	Lac Mccuaig	A	22.3 ft	2.8 µg/L
4	Lac de la Ferme	A	18 ft	3.6 µg/L
5	Lac Thorne	A	22.1 ft	3.6 µg/L
6	Lac à Killoran	A	16.4 ft	5.6 µg/L
7	Lac Long	A	-	2.6 µg/L
8	Lac Lawless	A	18.4 ft	-
9	Lac Leslie	A	19 ft	-
10	Lac Simpson	A	17.7 ft	-
11	Lac Mccolgan	A	17.1 ft	-
12	Lac à la Truite	A	15.4 ft	-
13	Lac Thompson	A	20.3 ft	-
14	Lac Neil	A	25.3 ft	-
15	Lac Mccarthy	A	17.1 ft	-
16	Lac Georges	B	9.5 ft	8 µg/L
17	Lac de la Roche	B	13.5 ft	-
18	Lac Presley	B	13.1 ft	-