What is the cleanest lake in Portneuf County, Québec?

Lac Sergent in Portneuf County is the cleanest lake on the readings in Portneuf County, Québec with an EPA water-quality readings of — and 11.2 feet of 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; it is not the letter. Lakes without enough recent samples are UNRATED, not given an F. Source data comes from the EPA Water Quality Portal.

Cleanest Lakes in Portneuf County, Québec

Lac Sergent in Portneuf County leads the rankings on measured clarity and nutrients and 11.2 ft of clarity. Below are the top 23 cleanest monitored lakes in Portneuf County, Québec, ranked by EPA water quality score.

Ranked List

#	Lake	County	Clarity	Phosphorus	Algae
1	Lac Sergent	Portneuf	—	11.2 ft	8.6 µg/L	5.2 µg/L
2	Lac Bleu	Portneuf	—	10.8 ft	8 µg/L	2.9 µg/L
3	Lac Simon	Portneuf	—	13.8 ft	3.5 µg/L	1.3 µg/L
4	Lac Alain	Portneuf	—	6.7 ft	7.8 µg/L	6.4 µg/L
5	Lac Carillon	Portneuf	—	13.3 ft	4.8 µg/L	3 µg/L
6	Lac de L'Oasis	Portneuf	—	5.9 ft	12.3 µg/L	2.7 µg/L
7	Lac Blanc	Portneuf	—	11.5 ft	6.6 µg/L	2.9 µg/L
8	Lac Montauban	Portneuf	—	12.6 ft	6.4 µg/L	3.1 µg/L
9	Lac Long	Portneuf	—	13.8 ft	6 µg/L	2.8 µg/L
10	Lac Perreault	Portneuf	—	7.5 ft	6.1 µg/L	3.1 µg/L
11	Lac ÉMeraude	Portneuf	—	23.5 ft	2.6 µg/L	1.1 µg/L
12	Lac Sainte-Anne	Portneuf	—	12 ft	5.3 µg/L	1.9 µg/L
13	Lac Clair	Portneuf	—	26.6 ft	2.5 µg/L	1 µg/L
14	Lac à L'Anguille	Portneuf	—	17.7 ft	3.6 µg/L	1.1 µg/L
15	Lac Aux CèDres	Portneuf	—	11.2 ft	5.4 µg/L	1.6 µg/L
16	Lac Travers	Portneuf	—	9.8 ft	5 µg/L	1.7 µg/L
17	Le Gros Lac	Portneuf	—	14.8 ft	5 µg/L	1.9 µg/L
18	Lac à la Hache	Portneuf	—	4.6 ft	10.2 µg/L	2.3 µg/L
19	Lac Rita	Portneuf	—	27.6 ft	5.4 µg/L	1.8 µg/L
20	Lac Morasse	Portneuf	—	9.5 ft	6.3 µg/L	2 µg/L
21	Lac Vert	Portneuf	—	13.5 ft	5.8 µg/L	5.2 µg/L
22	Lac de la Ferme	Portneuf	—	9.5 ft	7.1 µg/L	1.8 µg/L
23	Lac Sept ÎLes	Portneuf	—	11.8 ft	7.3 µg/L	4.2 µg/L

Ranked List

More Answers for Portneuf County, Québec