湖北省赤壁市城区生活饮用水水质监测分析

Monitoring Analysis on the Quality of Drinking Water in Urban Areas of Chibi City

目的掌握陆水水库发生水华现象后水源水的水质现况,为城区居民提供安全卫生饮用水提供依据。方法按《生活饮用水标准检验办法》(GB/T 5750-2006),于2011年7月采集陆水水库水源水及经市供水公司制水工艺后的出厂水,常规检测指标31项,非常规检测指标31项,进行检测分析。结果水源水中pH=9.41,汞<0.001 mg/L,符合IV类标准;镉<0.0025 mg/L,符合II类标准;总氮4.51 mg/L,超过V类2.0 mg/L的限值,氨氮为0.41 mg/L,符合II类标准,其它项目符合I类标准。出厂水除色度、浑浊度、pH超过生活饮用水标准外,其它项目符合生活饮用水卫生标准。结论赤壁市城区生活饮用水水质基本符合《生活饮用水卫生标准》要求,能够保障城乡居民饮水安全及社会发展要求,但应进一步加强水源的保护,防止水源污染。

Objectives To understand the quality of source water after phytoplankton blooms in Lushui Reser- voir, to provide safe and sanitary drinking water for urban residents. Methods According to the Standard Exami- nation Methods for Drinking Water （GB/T 5750 - 2006） , the source water from Lushui Reservoir and the drinking water purified by the water supply company were collected; 31 routine tests and 31 unconventional detections were done. Results Besides the pH （9.41） of the source water was a little higher than the standard limit, the contain- ment of mercury was less than 0. 001 mg/L （corresponding to standard IV） , cadmium was less than 0. 0025 mg/L （ corresponding to standard II） , total nitrogen was 4.51 mg/L （ exceeding the standard V, the maximum value was 2.0 mg/L） , and ammonia nitrogen was 0.41 mg/L （corresponding to standard II）, and all the other items were corresponding to standard I. The quality of all items in purified water was corresponding to the sanitary standard for drinking water except the chrominance, turbidity and pH. Conclusions The quality of drinking water in urban ar- eas of Chibi city was totally corresponding to the sanitary standard for drinking water, which can ensure the safety of drinking water for urban residents. However, further protection of water sources and keep it from being polluted is needed.