When the drinking water is treated in a water treatment plant, it is dosed with chlorine in order to kill bacteria and keep the water safe in the distribution network. This water is then supplied to our households in two ways: one is directly through the pipelines and the other is that it is sent to a distribution station/booster station or reservoirs, where it is dosed again with chlorine or another disinfecting agent and then pumped to our household through pipelines. The second method is known as post-treatment chlorination. I would like to know what are the various disinfectants used for the re-dosing at the distribution station, in what state, quantity and at what point are the dosed in the distribution network. All inputs are welcomed and thank you for your time.
In Denmark water is not disinfected so there is no chemical added to the water. We rely on groundwater which is biologically stable and doesn't have harmful bacteria.
Please see this site for WHO options for your concern and the article too. It really does not matter what obtains in my locality but safety must at all times and in all places be established for drinking water.
https://www.who.int/water_sanitation_health/publications/WSH-distribution_system-20141114.pdf
Article Optimizing Dosage and Location of Chlorine Injection in Wate...
chlorine in different form ( Liquid , Gaze or Tablets ) will used as disinfection chemicals, and in general the Residual chlorine should not be more than 0.5 mg/l after 30 min from adding to the water , for rural areas where people did not used proper way for storing water or transportation it will be critical if the residual chlorine become zero after 30 min and that is indicator for low safety of water and you have to chick the bacteria and add additional chlorine
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