Parameter Consent Guideline g / m3 99% 2018 DGVs g / m3 95% 2018 DGVs g / m3 99% 2000 ANZECC g / m3 95% 2000 ANZECC g / m3 Change from 2000 guidelines? pH 6.5 to 9 20th Percentile = 7.2 80th Percentile = 7.8 6 to 9 6 to 9 Yes Cyanide 0.09300 0.00400 0.00700 0.00400 0.00700 No Iron 1.00000 ID ID ID ID No Manganese 2.00000 1.20000 1.90000 1.20000 1.90000 No Copper 0.01100 0.00100 0.00140 0.00100 0.00140 No Nickel 0.16000 0.00800 0.01100 0.00800 0.01100 No Zinc 0.10000 0.00240 0.00800 0.00240 0.00800 No Silver 0.00240 0.00002 0.00005 0.00002 0.00005 No Antimony 0.03000 0.00900 reliability unknown* ID ID No Arsenic (As III) 0.19000 0.00100 0.02400 0.00100 0.02400 No Arsenic (As V) 0.19000 0.00080 0.01300 0.00080 0.01300 No Selenium 0.00500 0.00500 0.01100 0.00500 0.01100 No Mercury 0.00001 0.00006 0.00060 0.00006 0.00060 No Cadmium 0.00100 0.00006 0.00020 0.00006 0.00020 No Chromium (Cr III) 0.01000 ID ID ID ID No Chromium (Cr VI) 0.01000 0.00001 0.00004 0.00001 0.00100 Yes Lead 0.00250 0.00100 0.00340 0.00100 0.00340 No ID = insufficient data *Antimony guideline given with unknown reliability.
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