什么是“二次(ci)供(gong)水”？造(zao)成“二次(ci)供(gong)水”水質污染的原因有哪些？
二(er)次(ci)(ci)供(gong)(gong)水(shui)(shui)設(she)(she)施是指用(yong)戶(hu)自建供(gong)(gong)水(shui)(shui)設(she)(she)施中用(yong)于(yu)二(er)次(ci)(ci)加壓(ya)的(de)地下水(shui)(shui)池、屋(wu)頂水(shui)(shui)箱以及(ji)加壓(ya)泵房(fang)等設(she)(she)施。“二(er)次(ci)(ci)供(gong)(gong)水(shui)(shui)”水(shui)(shui)質(zhi)污(wu)染是指自來(lai)水(shui)(shui)在經過二(er)次(ci)(ci)供(gong)(gong)水(shui)(shui)設(she)(she)施轉供(gong)(gong)時受到污(wu)染，致使從用(yong)戶(hu)水(shui)(shui)龍頭流出的(de)自來(lai)水(shui)(shui)水(shui)(shui)質(zhi)指標(biao)超標(biao)，達不(bu)到國家生活飲用(yong)水(shui)(shui)衛生標(biao)準。
