Objective To monitor the drinking water quality and promote informatization of drinking water health in spection, so as to safeguard drinking water quality in Shanghai.
Methods Data of drinking water quality monitoring the municipal supply networks were collected and statistically analyzed by the Shanghai Drinking Water Health Inspection and Warning Control Platform.
Results From May 2009 to Dec 2012, 5 095 entries of drinking water quality data in 117 municipal supply networks were collected. The total qualified rate was 82.7%. The qualified rates were 72.1%, 83.3%, 85.5% and 85.9% for each selected year respectively with significant difference (χ2=87.038, P<0.01). According to different water sources and grades of water supply plants, the whole city was divided into seven districts, and the difference in drinking water quality among the seven districts was significant (χ2=638.014, P<0.01). A total of 1 087 indices were not qualified. The differences in the qualified rates of disinfectant residual, total bacterial count, turbidity, iron, manganese, and chemical oxygen demand among 7 districts were significant, except total coliform group and color.
Conclusion Drinking water quality in distribution networks in Shanghai is good in general, and informatization construction will safeguard urban drinking water quality.
DownLoad: