Dear Housing Department,
I would like to request the information about the test results of drinking water samples from all public housing units in Hong Kong.
1. How many tests of drinking water samples has the Department conducted over the past 5 years?
2. Among all these tests, how many water samples fail to meet the World Health Organisation (WHO) standard?
3. For each water sample which fails to meet the WHO standard, which housing estate is involved? What is/are the safety concern(s)?