25. The Bureau of Indian Standards has prepared a draft standard for the supply of piped drinking water, named as “Drinking Water Supply Quality Management System-requirements for piped drinking water supply service”.
Which of the following statements are the key features of the draft ?
1. After treatment the drinking water should conform to Indian Standard (IS) 10500.
2. Adoption of District Metering Area concept to control leakages.
3. Water audit should be conducted on quarterly basis.
 

Select the correct answer using the code given below :

1. Only 1 and 2

2. Only 2 and 3

3. Only 1 and 3

4. 1, 2 and 3

Correct Answer :

1, 2 and 3