What is the cleanest lake in Simcoe County, Ontario?

Bass Lake in Simcoe County is the cleanest lake on the readings in Simcoe County, Ontario with an EPA water-quality readings of — and 9.8 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 Simcoe County, Ontario

Bass Lake in Simcoe County leads the rankings on measured clarity and nutrients and 9.8 ft of clarity. Below are the top 14 cleanest monitored lakes in Simcoe County, Ontario, ranked by EPA water quality score.

Ranked List

#	Lake	County	Clarity	Phosphorus	Algae
1	Bass Lake	Simcoe	—	9.8 ft	10.9 µg/L	-
2	Couchiching Lake	Simcoe	—	13.1 ft	10.3 µg/L	-
3	Farlain Lake	Simcoe	—	9.2 ft	9.9 µg/L	-
4	Gloucester Pool	Simcoe	—	15.4 ft	9.6 µg/L	-
5	Little Lake	Simcoe	—	11.5 ft	9.7 µg/L	-
6	Orr Lake	Simcoe	—	8.2 ft	12.6 µg/L	-
7	Simcoe Lake	Simcoe	—	14.8 ft	10.6 µg/L	-
8	Sparrow Lake	Simcoe	—	14.8 ft	10.9 µg/L	-
9	St John Lake	Simcoe	—	8.2 ft	29.4 µg/L	-
10	Tea Lake	Simcoe	—	4.8 ft	15.2 µg/L	-
11	Lake Simcoe	Simcoe	—	31.5 ft	7.1 µg/L	-
12	Little Lake	Simcoe	—	5.9 ft	20.5 µg/L	-
13	Little Lake	Simcoe	—	8.5 ft	9.4 µg/L	-
14	Long Lake	Simcoe	—	9.4 ft	8.8 µg/L	-

Ranked List

More Answers for Simcoe County, Ontario