Chlorine is added to drinking water What is the highest concentration added so that it is not toxic?
Residual chlorine. if become more than permissible limit . such water become health hazardous. Treatment of chlorination depend on water quality.
Dear Sura Salim . Chlorine levels up to 4 milligrams per liter(mg/L or 4 parts per million (ppm)) are considered safe in drinking water . At this level, harmful health effects are unlikely to occur. See the useful link: https://www.cdc.gov/healthywater/drinking/public/water_disinfection.html#:~:text=Chlorine%20levels%20up%20to%204,effects%20are%20unlikely%20to%20occur.
Kindly see also the following useful link: https://ww2.health.wa.gov.au/Articles/A_E/Chlorinated-drinking-water
Also check please the following useful link: https://www.safewater.org/fact-sheets-1/2017/1/23/what-is-chlorination
The following link is also very useful: https://www.avidityscience.com/media/wysiwyg/OP-000091_-_Chlorination_of_Drinking_Water.pdf
Visit also the following useful link: https://cdn.who.int/media/docs/default-source/wash-documents/wash-chemicals/chlorine.pdf?sfvrsn=88760f74_4
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