我省从1988年开始对城市51个、县城88个自来水厂的水质进行监测。4年来城市与县城分别监测水样1507份和2390份,合格率分别为74.3％、51.0％。监测结果表明城市与县城自来水厂出厂水的主要卫生问题是余氯合格率偏低,细菌总数、总大肠菌群、浊度以及铁锰超标等。结果还表明,水质合格率逐年上升,浊度的中位数逐年降低,而总硬度、硫酸盐、氯化物、溶解性总固体、硝酸盐的中位数则逐年增高,并有季节性变化。 Since 1988, our province has monitored the water quality of 51 water works and 88 water works in the county. Over the past four years, cities and counties respectively monitored 1507 and 2390 water samples, with pass rates of 74.3% and 51.0% respectively. The monitoring results show that the main health problems of water produced in urban and county waterworks are the low qualified rate of residual chlorine, the total number of bacteria, total coliforms, turbidity and excessive levels of iron and manganese. The results also showed that the passing rate of water quality increased year by year, the median turbidity decreased year by year, while the total hardness, sulfate, chloride, total dissolved solids, nitrate median increased year by year, with seasonal changes.