湖南省农村生活饮用水改水水质及水源防护卫生调查与评价

Investigation and Evaluation on Quality of Drinking Water and Water Resources Protection in Rural Areas of Hunan Province

本文报道湖南农村改水水质及水源防护卫生的改善情况。改水后与未改水者比较，水质感官性状显著改良，细菌学指标合格率大幅度上升，各项指标都达标的水样数由２．９％提高到３３．８％（Ｘ￣２＝２４．９１，Ｐ＜０．０１）；水质综合指数改水后为６．６５，而未改水者达３４．８４；水源防护卫生状况明显好转（Ｘ￣２＝１１．９１，ｐ＜０．０１）。未改水对照点的条件与调查点改水前一致，故调查结果可视为改水前、后水质和水源卫生的变化。

The paper reports the results of investigation on quality of drinking water and water resources protection in rural areas of Hunan province, After water supply project, the sensory properties of drinking water improved significantly,the percentage of samples up to the standard on bacteria increased greatly. The percentage of overall indicators up to the standard also increased form 2.9%to 33.8%(X2=24. 91,P<0.01).The water quality index(WQI) was 6. 65 in places where there was water supply project while the WQI was 34. 84 in places where there was still no water supply project. The condition of water resources improved obviously(X2=ll. 9l,P<0.01).The results of the investigation can be interpreted as that the quality of drinking water and hygienic conditions of water resources improved after water supply project.