What is the cleanest lake in Montcalm County, Québec?

Lac Bob in Montcalm County has the cleanest nutrient and algae readings in Montcalm County, Québec, with 11.5 feet of measured water clarity.

How are these rankings calculated?

Nutrients and algae, total phosphorus, nitrogen, chlorophyll-a and turbidity, are read against EPA National Lakes Assessment 2022 condition classes for that lake’s ecoregion. Water clarity (Secchi depth) is measured and shown separately. Lakes without enough recent samples are listed without a condition class rather than ranked low. Source data comes from the EPA Water Quality Portal.

Cleanest Lakes in Montcalm County, Québec

Lac Bob in Montcalm County leads the rankings on measured clarity and nutrients and 11.5 ft of clarity. Below are the top 7 cleanest monitored lakes in Montcalm County, Québec, ranked on EPA nutrient and algae measurements.

Ranked List

#	Lake	County	Clarity	Phosphorus	Algae
1	Lac Bob	Montcalm	11.5 ft	6 µg/L	2.4 µg/L
2	Lac Mcgill	Montcalm	6.9 ft	9.8 µg/L	3 µg/L
3	Lac Colette	Montcalm	6.9 ft	11.3 µg/L	2.4 µg/L
4	Lac Cristal	Montcalm	23.6 ft	2.3 µg/L	1.2 µg/L
5	Lac Siesta	Montcalm	7.5 ft	8.5 µg/L	6.3 µg/L
6	Lac Rond	Montcalm	8.5 ft	7.5 µg/L	1.9 µg/L
7	Lac Duffy	Montcalm	9 ft	9.9 µg/L	3.8 µg/L

Ranked List

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