Bruce County Lake Quality

Ontario, 18 lakes, average grade B (Good)

Bruce County's 18 graded lakes fall in the moderate-density bracket for Ontario. The county-level average smooths over real differences — a single agricultural watershed near the southwest corner can pull the average down even if the rest of the county runs clean. The county-wide average lands at B — solid water quality with most lakes carrying clear summer transparency and low-to-moderate phosphorus.

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. Gillies Lake (A) is the cleanest in the county.

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Quick Answers for Bruce County

Cleanest lakes in Bruce County →Cleanest lakes in Ontario →Safest swimming lakes in Ontario →

Planning a trip? Check special fishing regulations for Gillies Lake — or check the official Ontario fishing regulations.

All Lakes in Bruce County

Rank	Lake	Grade	Clarity	Phosphorus
1	Gillies Lake	A	17.2 ft	4.2 µg/L
2	Marl Lake	A	16.4 ft	10.4 µg/L
3	Chesley Lake	A	11.5 ft	15.4 µg/L
4	Gould Lake	A	10.2 ft	9.9 µg/L
5	Pearl Lake	A	14.1 ft	7 µg/L
6	Cameron Lake	A	11.2 ft	5.3 µg/L
7	Cyprus Lake	A	13.8 ft	5.1 µg/L
8	Silver Lake	A	12.8 ft	16.6 µg/L
9	Rosalind Lake	B	9.8 ft	13.9 µg/L
10	Boat Lake	B	5.9 ft	6.6 µg/L
11	Miller Lake	B	6.2 ft	8.6 µg/L
12	Arran Lake	C	7.7 ft	-
13	Berford Lake	C	7.5 ft	-
14	Little Lake	C	5.7 ft	26.8 µg/L
15	West Little Lake	C	3 ft	11.9 µg/L
16	Isaac Lake	D	5.1 ft	-
17	Shouldice Lake	D	6.6 ft	-
18	Sky Lake	D	5.1 ft	-