家庭用(yong)水(shui)(shui)污(wu)(wu)染(ran)(ran)(ran)(ran)的(de)原(yuan)因(yin)主(zhu)要包括水(shui)(shui)源(yuan)污(wu)(wu)染(ran)(ran)(ran)(ran)、自(zi)來水(shui)(shui)余氯殘(can)留以及(ji)自(zi)來水(shui)(shui)運(yun)(yun)(yun)輸(shu)管道(dao)污(wu)(wu)染(ran)(ran)(ran)(ran)等(deng)等(deng)。這三個是(shi)(shi)飲用(yong)水(shui)(shui)污(wu)(wu)染(ran)(ran)(ran)(ran)最(zui)主(zhu)要的(de)途徑，其中尤其是(shi)(shi)水(shui)(shui)源(yuan)污(wu)(wu)染(ran)(ran)(ran)(ran)以及(ji)運(yun)(yun)(yun)輸(shu)管道(dao)污(wu)(wu)染(ran)(ran)(ran)(ran)，這兩(liang)個污(wu)(wu)染(ran)(ran)(ran)(ran)是(shi)(shi)現在不(bu)可(ke)避免(mian)。這是(shi)(shi)由于通常水(shui)(shui)源(yuan)污(wu)(wu)染(ran)(ran)(ran)(ran)是(shi)(shi)由于工業用(yong)水(shui)(shui)，農業用(yong)水(shui)(shui)等(deng)排污(wu)(wu)處理沒做好的(de)原(yuan)因(yin)，而自(zi)來水(shui)(shui)運(yun)(yun)(yun)輸(shu)管道(dao)污(wu)(wu)染(ran)(ran)(ran)(ran)則是(shi)(shi)由于我們的(de)自(zi)來水(shui)(shui)是(shi)(shi)經過(guo)漫(man)長的(de)高樓(lou)水(shui)(shui)塔(ta)、水(shui)(shui)箱等(deng)設施，在這個運(yun)(yun)(yun)輸(shu)當中不(bu)可(ke)避免(mian)地會(hui)有(you)一(yi)些(xie)污(wu)(wu)染(ran)(ran)(ran)(ran)物，這些(xie)污(wu)(wu)染(ran)(ran)(ran)(ran)物互相作用(yong)之(zhi)后(hou)，就會(hui)產生(sheng)一(yi)些(xie)有(you)毒的(de)化學物質。