Monitoring Quality of Drinking Water in Mianyang Rural Drinking Water Safety Projects in 2013

Objectives To understand the sanitary situation of drinking water safety project in rural areas of Mianyang, to control the occurrence of waterborne diseases and provide scientific basis for improving the quality of rural drinking water and ensuring the safety of drinking water in rural areas.

Methods The basic state of drinking water safety projects were investigated and the water quality was monitored in rural areas of Mianyang. The water quality detection and evaluation were based on the Standard Examination methods for Drinking Water(GB/T 5750-2006) and the Standards for Drinking Water Quality (GB 5749-2006), respectively.

Results The decentralized water supply was the major pattern in Mianyang, and ground water was the major source of water supply. The proportion of drinking water completely treated by the centralized water supply was only 34.86%. The qualified rate was 54.73% for 592 water samples. The indexes of disinfectant and the total bacteria count exceeded the national standard limits. The qualified rates in dry and wet season were 55.41% and 54.05%, respectively. The qualified rates for treated water and tap water were 57.43% and 52.03%, respectively.

Conclusions The qualified rates were relatively low in rural drinking water safety projects of Mianyang. The water disinfection facilities was not perfect, and the unqualified rates for microbial indexes were high, and there were potential hazards for the safety of drinking water. Comprehensive measures should be taken by relevant departments to strengthen the hygienic supervision over the rural drinking water supply.