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Table 19
Excursion correlation coefficient for the Ontario dataset

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Ammonia
Cadmium
Chloride
Chromium
Copper
Nickel
Nitrate
Nitrite
pH
Phosphorus
Lead
Suspended solids
Temperature
Ammonia
...
−0.011
0.041
0.001
0.001
0.001
−0.021
0.171
0.031
0.121
−0.011
−0.011
0.001
Cadmium
−0.012
...
−0.011
0.001
0.011
0.001
−0.031
−0.011
0.001
0.001
0.121
0.011
0.001
Chloride
0.282
0.012
...
0.001
0.001
0.001
−0.011
0.031
0.001
0.031
−0.011
0.001
−0.011
Chromium
0.012
0.072
0.072
...
0.001
0.001
0.001
0.001
0.001
0.001
0.011
0.001
0.001
Copper
0.062
0.092
0.092
0.262
...
0.021
−0.011
0.001
0.001
0.031
0.031
0.041
0.001
Nickel
0.002
−0.012
0.002
0.002
0.042
...
0.001
0.001
0.001
0.001
0.001
0.001
0.001
Nitrate
−0.012
−0.012
0.042
−0.032
0.022
−0.012
...
0.021
0.001
0.221
0.001
0.051
−0.031
Nitrite
0.402
0.012
0.222
0.042
0.192
0.002
0.352
...
0.001
0.061
0.001
0.011
−0.011
pH
0.082
0.002
−0.012
0.002
−0.012
0.002
0.012
−0.012
...
0.001
0.001
0.001
0.001
Phosphorus
0.212
0.022
0.192
0.102
0.322
−0.012
0.322
0.422
0.012
...
0.231
0.411
−0.021
Lead
−0.032
0.102
−0.042
0.142
0.212
0.032
−0.092
−0.022
0.012
−0.022
...
0.191
−0.011
Suspended solids
0.022
0.052
−0.022
0.172
0.392
−0.012
0.102
0.202
−0.012
0.532
0.112
...
−0.011
Temperature
0.032
−0.032
−0.032
−0.022
−0.052
0.002
−0.052
0.002
0.062
−0.012
0.002
−0.022
...
Notes:
1. The values above the diagonal represent Pearson’s correlation coefficients.
2. The values above the diagonal represent Spearman’s correlation coefficients.
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.