Parameter Consent Guideline µg / L 99% 2018 DGVs µg / L 95% 2018 DGVs µg / L 99% 2000 ANZECC µg / L 95% 2000 ANZECC µg / L 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 93.00 4.00 7.00 4.00 7.00 No Iron 1000.00 ID ID ID ID No Manganese 2000.00 1200.00 1900.00 1200.00 1900.00 No Copper 11.00 1.00 1.40 1.00 1.40 No Nickel 160.00 8.00 11.00 8.00 11.00 No Zinc 100.00 2.40 8.00 2.40 8.00 No Silver 2.40 0.02 0.05 0.02 0.05 No Antimony 30.00 9.00 reliability unknown ID ID No Arsenic (As III) 190.00 1.00 24.00 1.00 24.00 No Arsenic (As V) 190.00 0.80 13.00 0.80 13.00 No Selenium 5.00 5.00 11.00 5.00 11.00 No Mercury 0.01 0.06 0.60 0.06 0.60 No Cadmium 1.00 0.06 0.20 0.06 0.20 No Chromium (Cr III) 10.00 ID ID ID ID No Chromium (Cr VI) 10.00 0.01 0.04 0.01 1.00 Yes Lead 2.50 1.00 3.40 1.00 3.40 No ID = insufficient data *Antimony guideline given with unknown reliability.
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