Investigation on Hygienic State of Drinking Water in Rural Areas of Weifang City in 2006

[Objective]To understand the hygienic state of drinking water in the countryside in order to improve the water quality and to set up a security system in Weifang city.[Methods]Investigation on water supply in rural areas and sample examination for water quality were carried out from March to May 2006.[Results]Of the 6 037 800 population in rural areas,47.72% of them had no safe drinking water.4 indexes of water supply did not meet the quality standard(61.63% with the population of 3 721 100) in which unqualified water accounted for 78.56%.The quantity of water which did not up to the standard accounted for 7.55%.8.74% of the water supply was not convenient and 5.15% of them had no ensurence.Of 680 randomly selected central water supply systems,67.79% of them had no water purifying equipments.Of 2 416 samples,only 47.19% of them was up to the standard.The qualified rate of central water supply was 68.42%,separate water supply was 38.94%(P0.01),ground water was 59.67%,surface water was 26.56%(P0.01),deep ground water was 74.06% and shallow ground water was 48.34%(P0.01).The superstandard rate of the total amount of bacteria,color scale,opacity,nitrite nitrogen,ammonia nitrogen,nitrite nitrogen and chloride was 26.49%,21.48%,16.68%,15.60%,15.36%,15.12%,12.29% respectively.[Conclusion]Large numbers of population in rural areas in Weifang had no safe drinking water.The qualified rate of drinking water is low.