Directive or regulation | Reference and limit values for the concentration in drinking water [mg l−1] | ||||||
---|---|---|---|---|---|---|---|
Pb | Cd | Hg | As | Cr | Cu | Zn | |
Drinking Water Ordinance for Germany [38] | 0.01 | 0.003 | 0.001 | 0.01 | 0.05 | 2 | – |
WHO guideline [93] | 0.01 | 0.003 | 0.001a 0.006b | 0.01 | 0.05 | 2 | – |
EU-Directive 2013/39/EU [16] | 0.01 | 0.005 | 0.001 | 0.01 | 0.05 | 2 | Â |
USA [94] | 0.015 | 0.005 | 0.002 | 0.01 | 0.1 | – |  |
Canada [95] | 0.01 | 0.005 | 0.001 | 0.01 | 0.05 | 1 | 5 |