Objectives To investigate the microbial contamination of drinking water in Luyang town after "4·20" earthquake, to ensure the safe of drinking water in urban area.
Methods Investigating the basic situation and production process of the county waterworks, monitoring continuously the quality of the finished water from the plant and the tap water from households, and analyzing the survey and monitoring results.
Results The total qualified rate for coliform group in finished water and tap water was 76.00% and 68.21%, respectively (χ2=0.62, P>0.05); the total qualified rate for turbidity was 40.00% and 28.92%, respectively (χ2=1.47, P>0.05).
Conclusions The process of water in waterworks was ineffective, and the total coliform group cannot reach the standard requirement. The quality of water produced in the waterworks should be improved.
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