Substance
|
Maximum Concentration
(ppm)
|
---|---|
Arsenic
|
0.05
|
Cadmium (as Cd)
|
0.1
|
Chromium (trivalent)
|
1.0
|
Chromium (hexavalent)
|
0.05
|
Copper (as Cu)
|
0.5
|
Cyanides (free CN)
|
0.05
|
Lead
|
0.3
|
Mercury
|
0.002
|
Nickel (as Ni)
|
2.0
|
Phenolic compounds
|
0.005
|
Silver
|
0.05
|
Zinc (as Zn)
|
1.0
|