Not necessarily. Many municipal water treatment plants are adding or switching to chloramines, which can be more stable than chlorine gas: https://en.wikipedia

Not necessarily. Many municipal water treatment plants are adding or switching to chloramines, which can be more stable than chlorine gas: https://en.wikipedia.org/wiki/Chloramine https://en.wikipedia.org/wiki/Chloramine The main problem is that they are potentially more carcinogenic. The rarely talked about, but potentially more serious problem, is that chlorine and chloramine are difficult to remove from water by letting it stand or boiling it: https://www.sfwater.org/Modules/ShowDocument.aspx?documentID=6920 https://www.sfwater.org/Modules/ShowDocument.aspx?documentID... https://www.physicsforums.com/threads/does-boiling-water-remove-chloramine.857730/ https://www.physicsforums.com/threads/does-boiling-water-rem... https://www.morebeer.com/articles/removing_chloramines_from_water https://www.morebeer.com/articles/removing_chloramines_from_... It looks like activated charcoal filters are the best way to neutralize it, but I'm having trouble finding numbers for how effective they are at it. https://homebrew.stackexchange.com/questions/3447/what-are-the-various-ways-to-remove-chlorine-chloramine-from-tap-water https://homebrew.stackexchange.com/questions/3447/what-are-t...