Water Quality Status and Protection Countermeasures Centralized Drinking Water Source in Towns of Zhenjiang City

According to the monitoring results of centralized of drinking water source in 13 towns of zhenjiang city from 2011 January to 2012 July and the water quality analysis in different years,the water quality change situation and trend,the main pollutants and thier contribution to water pollntion were discussed.The results showed that,during this period,the city's rural drinking water quality in good condition,the water quality of lake and reservoir were generally better than that in river.In dry season,water quality is the worst,pollution share rate of 33.76%.In abundant water period,the water quality is relatively good.The major pollutants of 13 drinking water sources in 2013 were nitrogen,phosphorus and organic pollution,and their share rate readred 80.3%,while the inorganic,metallic and bacterial contamination proportion is very small.The lake and reservoir water source protection should focus on reducing the surrounding human activity;the river water source protection should focus on city river harnessing and sewage pipe network imprwement.In addition,the highway along river in the prevention of sudden environmental pollution accident would be the key.