摘要：①目的　了解高层建筑二次加压供水水质状况。②方法 采取22处高层建筑二次加压供水水样，分别测定细菌总数、总大肠菌群数、余氯及氨氮等指标，并与一般水网水样检测结果进行比较。③结果 冬春季及夏秋季二次供水水样中的细菌总数、总大肠菌群数及氨氮含量均高于同期一般水网水样，差异有显著性（t=2.57～28.62,P<0.05,0.01);余氯含量低于同期一般水网水样,差异有显著性（t=24.50～31.58,P<0.01)。

关键词：二次供水 水污染 消毒 水质调查

R123.5 INVESTIGATION OF WATER QUALITY FROM SECONDARY WATER SUPPLY SYSTEM OF HIGH BUILDINGS Wang Qiuzhen, Zhang Chaoying, Lu Xiaoqing Department of Preventive Medicine,

【ABSTRACT】 Objective To find out water quality of secondary water supply system of high buildings. Methods Sampling water was taken from sencondary water supply system. Total bacterial count, total coliform group, residua……