In any case, wouldnt you be able to smell and taste chlorine?

I thought we don’t taste it because it’s such a small amount, while I obv still taste it in a public swimming pool.

I did read the same source, but you left some out… Also if I read the table correctly it states that most countries in Europe use chlorine for water treatment.

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.