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Table 33
Percentage of samples compliant with the guidelines per season for each parameter for the Ontario dataset

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Winter
(663 samples)
Spring
(1,882 samples)
Summer
(2,204 samples)
Autumn
(1,779 samples)
Ammonia
99.0
98.0
97.1
97.6
Cadmium
43.8
51.1
54.8
48.0
Chloride
90.2
95.3
96.8
96.8
Chromium
92.5
95.9
97.7
96.9
Copper
85.0
85.5
89.4
89.8
Nickel
100.0
99.9
100.0
100.0
Nitrate
67.7
75.9
89.3
84.6
Nitrite
90.1
85.0
89.8
92.6
pH
100.0
100.0
99.8
100.0
Phosphorus
49.4
46.2
47.4
55.8
Lead
85.2
87.2
87.0
85.4
Suspended solids
84.4
79.7
86.9
88.9
Temperature
100.0
99.4
92.7
100.0
Zinc
93.6
94.3
97.0
95.8
Data source: Data come from federal, provincial and joint water quality surveillance programs.
Table source: Statistics Canada, 2007, Environment Accounts and Statistics Technical Paper Series, volume 2007, number 3, Behaviour Study on the Water Quality Index of the Canadian Council of Ministers of the Environment, catalogue number 16-001-MWE.