Objective To understand the sanitary condition of secondary water supply in jinan railway area and provide scientific basis for railway departments to improve secondary water supply.Methods According to《Standard test method for drinking water》,we sampled and tested the water quality.On the basis of《Hygienic specification for facilities of secondary water supply》,we analyzed the data about engineering acceptance and daily detection water quality.Results Daily detection of secondary water supply qualified rate was 82.69%,higher than engineering acceptance of secondary water supply qualified rate 65.77% (P<0.05).Acoording to the daily detection qualified rate analysis of secondary water supply,the qualified rate of water supply from living area,passenger station,well of the train track and train water tank was decreased successively.The difference of the qualification rate among the sampling locations is statistically significant(P<0.05);The qualified rate in each month is all above 74% .The qualified rate in March,April,June and September is below 80% .Soil microbial indicators and disinfectant indicators qualified rate trend consistent with all indicators qualified rate trend.The qualified rate of ex-factory water was 90.54%,which was higher than 81.19% of peripheral water(P<0.05).The unqualified soil microbial indicators and disinfectant indicators are the main factors causing the unqualified secondary water supply.Conclusion The qualified rate of secondary water supply in jinan railway area is higher than other water supply types,but there are hidden dangers in the health situation.The supervision of secondary water supply should have further strengthen.
NETL
NSTL
万方数据
