Question

The most important water quality parameter for domestic use of water is

• A. chlorides
• B. non-carbonate hardness
• C. carbonate hardness
• D. coliform group of organisms

Answer 1

The correct option is D coliform group of organisms

For domestic use, the water should not contain any harmful bacteria or pathogens which can cause diseases. So, coliform test is most important water quality parameter while the other options viz. carbonate hardness, non-carbonate hardness and chlorides are tolerable upto a certain limit.