Final answer:
Chlorine and bacteriological samples are collected in the distribution system to ensure the safety and quality of the water supply.
Step-by-step explanation:
Chlorine and bacteriological samples are typically collected in the distribution system of water treatment facilities. This is done to ensure the safety and quality of the water supply. Chlorine kills harmful bacteria, while bacteriological samples are used to test for contamination.
Chlorine is added to the water as a disinfectant to kill harmful bacteria and other pathogens. The samples are collected at various points in the distribution system, including at the source of water, during treatment, and at different points along the distribution network.
Bacteriological samples are collected to test for the presence of bacteria that can indicate contamination. These samples are typically taken from taps or faucets throughout the distribution system and are analyzed for the presence of bacteria such as E. coli or coliforms.