Enhanced Water Quality Monitoring Programme Weekly Monitoring Data of the Six Metals at Consumers' Taps Week Ending Total No. of Metal Monitoring Data (μg/L) Drinking Water Samples Taken Parameter Standards(1) Minimum Maximum (μg/L) 28-January-2018 12 Antimony <1 <1 20 Cadmium <1 <1 3 Chromium <1 <1 50 Copper <3 220 2000 Lead <1 <1 10 Nickel <1 15 70 Note: (1) The government has adopted the corresponding guideline values/provisional guideline values in the fourth edition of the World Health Organization’s Guidelines for Drinking-water Quality (“WHO Guidelines”) published in 2011 as the Drinking Water Standards of Hong Kong.