家(jia)庭用水(shui)污(wu)(wu)(wu)(wu)染(ran)(ran)(ran)的(de)(de)原因主要(yao)包(bao)括水(shui)源污(wu)(wu)(wu)(wu)染(ran)(ran)(ran)、自來水(shui)余(yu)氯殘(can)留以及自來水(shui)運(yun)輸(shu)(shu)管(guan)道污(wu)(wu)(wu)(wu)染(ran)(ran)(ran)等(deng)等(deng)。這三個是(shi)飲用水(shui)污(wu)(wu)(wu)(wu)染(ran)(ran)(ran)最主要(yao)的(de)(de)途徑，其中尤(you)其是(shi)水(shui)源污(wu)(wu)(wu)(wu)染(ran)(ran)(ran)以及運(yun)輸(shu)(shu)管(guan)道污(wu)(wu)(wu)(wu)染(ran)(ran)(ran)，這兩個污(wu)(wu)(wu)(wu)染(ran)(ran)(ran)是(shi)現在不(bu)可避免。這是(shi)由(you)于通常水(shui)源污(wu)(wu)(wu)(wu)染(ran)(ran)(ran)是(shi)由(you)于工業用水(shui)，農業用水(shui)等(deng)排污(wu)(wu)(wu)(wu)處理沒做好的(de)(de)原因，而(er)自來水(shui)運(yun)輸(shu)(shu)管(guan)道污(wu)(wu)(wu)(wu)染(ran)(ran)(ran)則是(shi)由(you)于我(wo)們的(de)(de)自來水(shui)是(shi)經(jing)過漫長的(de)(de)高樓水(shui)塔、水(shui)箱等(deng)設施，在這個運(yun)輸(shu)(shu)當中不(bu)可避免地(di)會有一些(xie)污(wu)(wu)(wu)(wu)染(ran)(ran)(ran)物(wu)，這些(xie)污(wu)(wu)(wu)(wu)染(ran)(ran)(ran)物(wu)互相作用之后，就會產生(sheng)一些(xie)有毒(du)的(de)(de)化(hua)學物(wu)質。