Objectives To investigate the factors that influencing the drinking water quality in Mianyang in 2018.

Methods 1 146 samples of drinking water were monitored by the Standard Examination Methods for Drinking Water (GB/T 5750-2006).The results were evaluated according to the Standards for Drinking Water Quality (GB 5749-2006). The influencing factors of water quality were analyzed by the Logistic regression analysis. Chi-square test was used to compare the rates.

Results 1 146 samples were determined with the qualification rate of 67.36%.The compliance rates of aerobic bacterial count and total coliform count were poor. The influencing factors for the quality of drinking water in the rural areas were mainly the type of water source, the type of water period, the disinfection compliance, and the properly use of disinfection equipment. Among these factors, the value of odds ratio of the disinfection method in the water treatment process was 6.353, which had the greatest impact on water quality.

Conclusions The qualitied rate of rural drinking water is low in Mianyang. Many factors influence the qualification of water quality. Protection of water source and reinforcing the monagement of disinfection and supervision are the important measures for improving the qualifice rate of water quality.