江门市新会区水源水监测结果分析

目的了解江门市新会区水源水水质状况，为合理选择水源、水源保护和卫生监督管理等提供科学依据。方法对江门市新会区2008—2012年水源水的监测结果进行整理分析，按GB3838—2002《地表水环境质量标准》Ⅲ类标准进行分析评价。结果水源水中的铁、总氮、锰和粪大肠菌群的合格率较低；年度间合格率差异有统计学意义（χ^2=11．74，P〈0．05）；丰、枯和平水期水源水合格率差异无统计学意义（P〉0．05）；水库水合格率高于河水，两者差异有统计学意义（χ^2=23．01，P〈0．05）。结论江门市新会区镇级以上供水单位水源水主要受铁、总氮、锰和粪大肠菌群的污染，需采取措施加强对水源水的保护和对已经污染的水源的治理。

Monitoring results of source water in Xinhui district of Jiangmen city

Objective To study the sanitary condition of source water in Xinhui district of Jiangmen city. Methods The monitoring data of source water were collected and analyzed from 28 to 212. Results The pass rates of iron, total nitrogen, manganese and fecal coliform were low;There was significant difference from year to year in pass rates （χ^2 = 11.74, P 〈 . 5 ） ; There was no significant difference among wet period, dry period and level period in pass rates （ P 〉 . 5 ） ; The pass rate of water quality of reservoir was higher than that of rivers（χ^2 = 23. 1 ,P 〈 .5）. Conclusion The indexes of iron, total nitrogen, manganese and fecal coliform are the main pollutants in source water of Xinhui district of Jiangmen city, and it is necessary to take steps in protecting source water and harnessing the pollution of source water.