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Graph 2
Phosphorus and cadmium parameters for the Ontario dataset

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Graph 2a
Phosphorus parameter

Graph 2a Phosphorus parameter

Notes:
1. The guideline for phosphorous parameter is 0.03.
2. In the phosphorous parameter samples, 45.9% have a value between ]0.03; 0.20].   

Graph 2b
Cadmium parameter

Graph 2b Cadmium parameter

Note:
3. The guideline for cadmium parameter depends on hardness (mean of 0.053).

Chart 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.