What is the cleanest lake in Lanark County, Ontario?

Adam'S Lake in Lanark County is the cleanest lake on the readings in Lanark County, Ontario with an EPA water-quality readings of — and 14.1 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 Lanark County, Ontario

Adam'S Lake in Lanark County leads the rankings on measured clarity and nutrients and 14.1 ft of clarity. Below are the top 25 cleanest monitored lakes in Lanark County, Ontario, ranked by EPA water quality score.

Ranked List

#	Lake	County	Clarity	Phosphorus	Algae
1	Adam'S Lake	Lanark	—	14.1 ft	13.2 µg/L	-
2	Bennett Lake	Lanark	—	11.5 ft	9.3 µg/L	-
3	Bowley Lake	Lanark	—	4.4 ft	27.5 µg/L	-
4	Christie Lake	Lanark	—	15.1 ft	9.5 µg/L	-
5	Davern Lake	Lanark	—	17.1 ft	7.8 µg/L	-
6	Farren Lake	Lanark	—	19 ft	10.5 µg/L	-
7	Izatt Lake	Lanark	—	10.2 ft	13.6 µg/L	-
8	Little Silver Lake	Lanark	—	14.8 ft	8.3 µg/L	-
9	Long Lake	Lanark	—	13.5 ft	8.8 µg/L	-
10	Lower Rideau Lake	Lanark	—	14.8 ft	16.4 µg/L	-
11	Mclaren Lake	Lanark	—	10.2 ft	16.1 µg/L	-
12	Mississippi Lake	Lanark	—	11.2 ft	12.5 µg/L	-
13	Murray Lake	Lanark	—	7.9 ft	8.6 µg/L	-
14	Obrien Lake	Lanark	—	16.2 ft	8.8 µg/L	-
15	Otty Lake	Lanark	—	16.4 ft	13.3 µg/L	-
16	Patterson Lake	Lanark	—	17.4 ft	9.9 µg/L	-
17	Pike Lake	Lanark	—	15.4 ft	11.1 µg/L	-
18	Rainbow Lake	Lanark	—	9.2 ft	13.8 µg/L	-
19	Robert'S Lake	Lanark	—	15.3 ft	9 µg/L	-
20	Robertson Lake	Lanark	—	27.9 ft	10.8 µg/L	-
21	Rock Lake	Lanark	—	11.5 ft	8.4 µg/L	-
22	Round Lake	Lanark	—	12 ft	10 µg/L	-
23	White Lake	Lanark	—	10.5 ft	10.4 µg/L	-
24	Dalhousie Lake	Lanark	—	11.2 ft	9.2 µg/L	-
25	Farrell Lake	Lanark	—	20.7 ft	7.9 µg/L	-

Ranked List

More Answers for Lanark County, Ontario