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Environmental Sciences Europe
Fig. 4 | Environmental Sciences Europe

Fig. 4

From: An often-overestimated ecological risk of copper in Chinese surface water: bioavailable fraction determined by multiple linear regression of water quality parameters

Fig. 4

Risk ranking of 15 regions for the median concentrations of Cu in surface waters and PNEC based on standard water quality parameter level, and comparison to the raw toxicity data (a); proportions (%) of concentrations exceeded PNEC in surface waters of China (b); and prioritized regions according to prioritization indexes in descending order based on the standard water quality parameter level and comparison to without considering water quality parameters (c, d)

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