3.
"At the same time, iron and manganese are elements which human beings need to absorb daily. The slight amount of iron and manganese contained in water is therefore absolutely unharmful to health.
"All raw water transmitted to the water treatment plants under the Water Supplies Department is fully treated and disinfected. The water supplied to consumers after treatment fully complies with the chemical and bacterial standards laid down by the World Health Organisation," he stressed.
Content of lead, iron and manganese in Dongjiang water and in treated water (1.4.94 - 31.3.95) - Average values
Dongjiang water*
Environmental Quality Standard for Surface
Treated water in Hong Kong
World Health
Organization
Water GB-3838-83
Guideline
Class II, People's
Standard
Lead
less than 0.004
Republic of China
0.05
less than 0.004
0.01
Iron
0.12
not applicable
0.02
0.3#
Manganese
0.18
not applicable
0.01
0.1#
End
Note: 1. The unit for the above values is mg/litre
2. * - Based on water samples taken at Muk Wu Pumping Station 3. # - These standard values are established for aesthetic and
not for health reasons.