什么(me)是“二次(ci)供水”？造成“二次(ci)供水”水質(zhi)污染的原因有哪些(xie)？
二(er)次供(gong)水(shui)(shui)(shui)設施(shi)(shi)是指(zhi)用(yong)(yong)戶自(zi)(zi)建供(gong)水(shui)(shui)(shui)設施(shi)(shi)中(zhong)用(yong)(yong)于二(er)次加壓的地下水(shui)(shui)(shui)池(chi)、屋頂水(shui)(shui)(shui)箱以(yi)及加壓泵房等設施(shi)(shi)。“二(er)次供(gong)水(shui)(shui)(shui)”水(shui)(shui)(shui)質(zhi)污染是指(zhi)自(zi)(zi)來水(shui)(shui)(shui)在(zai)經過二(er)次供(gong)水(shui)(shui)(shui)設施(shi)(shi)轉(zhuan)供(gong)時受(shou)到(dao)污染，致使(shi)從用(yong)(yong)戶水(shui)(shui)(shui)龍(long)頭流出(chu)的自(zi)(zi)來水(shui)(shui)(shui)水(shui)(shui)(shui)質(zhi)指(zhi)標超標，達不到(dao)國家生活飲用(yong)(yong)水(shui)(shui)(shui)衛生標準(zhun)。
