2007年大连市城市生活饮用水监测结果分析

目的]了解大连市居民饮用水卫生状况，促进饮水质量的改善。方法]对2007年大连市集中式供水单位进厂水、出厂水和末梢水样检测结果进行分析。结果]共检测水样4067份，超标的68份，检测指标超标率为1．67％。其中，二次供水为6．49％，自备水源末梢水为6．11％，市政进厂水为0．56％、末梢水为1．46％。全部水样中，余氯超标的27份，细菌总数超标的20份，铁超标的9份，大肠菌群超标的6份，锰超标的4份，浑浊度超标的2份。结论]大连市城区生活饮用水水质总体较好，但微生物指标存在问题。

Analysis of Monitoring Result of Drinking Water in Dalian City in 2007

Objective]To understand the hygienic status of drinking water in Dalian city and promote the improvement of the quality of drinking water. Methods]Examination results of drinking water samples collected from the source, the factory and the terminal of the units of centralized water supply were analyzed in Dalian city in 2007. Results]4 067 water samples were tested, of them 68 were over the standard, accounting for 1.67%. The over-standard rate was 6.49%, 6.11%,0.56% and 1.46% for the water samples collected from second water supply, the well terminal water, water source from the municipal departments respectively. Of all the water samples, residual chlorine was over the standard in 27 samples, the total amount of bacteria was over the standard in 20 samples, 9,6,4 and 2 water samples were over the standard for iron,coli group,manganum and turbidity respectively. Conclusion]The quality of drinking water in Dalian city is good. Water quality monitoring should focus on the microbial indicators.