this is COMPLETE horse shit.
who the fuck wrote that? seriously? thats the stupidest shit ive ever seen. why dont you do even the most cursory research before you make such moronic claims?
do you understand how little chlorine there is in tap water?
this isnt fucking pool water. the tap water is virtually 100% clean already... infact the state makes you do "bactees", or bacteriological tests, wherein petri dish swaps are made with the tap water samples prior to the well being put into service.
if bacteria are present in the ground water, the state ramps up the requirements, and the well migh never even see public use. id say 99% of the time a positive bactee is from a poorly disinfected well case, in which case it can just be disinfected again.
i work on private water wells for a living btw.
chlorine disinfection via hypochlorous acid is perfectly safe. by the time it reaches your tap its likely down to around .1 mg/l.
hypochlorous acid is an insanely weak oxidant. this is why its able to linger in the water for long periods of time.... unlike peroxide.
without a long resiidence time, you run into issues wherein long water distributions sytems can go without any disinfection what so ever. this is BAD. when pipes age, the joints can sometimes leak water.... when pressure is taken off these pipes contaminated ground water can leak into these pipes via these leaks.
if you have 0 chlorine residual, this contaminated ground water can KILL YOU, especially if you are old as shit, or immune compromised.
when water lines are initially opened they need to be jetted and disinfected prior to use by the public.
this involves filling the water like with a solution of water and bleach at roughly 30mg/l.
people NEVER drink this water. its simply to disinfect the line prior to it being in use. this highly chlorinated water is then drained off via flushing valves or hydrants untill it tests below state standards.
that is literally the ONLY time a water line sees chlorine levels above normal. this is literally 0 chance you are drinking any appreciable amount of chlorine.
the only real issue is with waters prone to producing "HAA"s, and "THM"s. but guess what, the state tests for these disinfection by products. in waters particularly prone to their formation, alternative modes of disinfection can be used... such as chloramines or even a chlorine dioxide generator(very rare).
europe does NOT use peroxides. peroxides have very poor disinfection residuals.
i have heard of Europeans using UV disinfection, but most places uise chlorine and chloramine. peroxide is too expensive, and UV systems are high maintenance and limited to ONLY very small very high flow water systems with very low leakage levels.
https://en.wikipedia.org/wiki/Hypochlorous_acid#Reaction_with_DNA_and_nucleotides
https://en.wikipedia.org/wiki/Disinfection_by-product
Europe uses alternatieve disinfectants for drinking water disinfection, as well (table 1). France, for example, mainly uses ozone. In 1906 one started applying ozone for drinking water disinfection. Italy and Germany use ozone or chlorine dioxide as a primary oxidant and disinfectant. Chlorine is added for residual disinfection. Great Britain is one of few European countries that use chloramines for residual disinfection in the distribution network and for the removal of disinfection byproducts. Finland, Spain and Sweden use chloramines for disinfection occasionally.
Where I live the Cl content EXCEEDS that to maintain a swimming pool