Enhanced Water Quality Monitoring Programme Weekly Monitoring Data of the Six Metals at Consumers' Taps Hong Kong Week Ending Total No. of Metal Monitoring Data (μg/L) Drinking Water Samples Taken Parameter Minimum Maximum Standards(1) (μg/L) 05-January-2020 9 Antimony <1 <1 20 Cadmium <1 <1 3 Chromium <1 <1 50 Copper <3 110 2000 Lead <1 9 10 Nickel <1 2 70 Note: (1) The Government currently adopts 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 Hong Kong Drinking Water Standards.