Objective To understand the Legionella pneumophila contamination status of shower water in Ma'anshan City,and to explore the influencing factors of Legionella pneumophila contamination in shower water,so as to provide relevant basis for health supervision and management. Methods A total of 49 bathing places operating normally for 1 year or more in Ma'anshan City were selected as monitoring objects,and 222 shower water samples were collected.At the same time,a questionnaire survey was conducted on the operators,including the basic situation of bathing places,the management of bathing water,and the management of water storage equipment. Results Legionella pneumophila was detected in 53.1% of shower water samples (26 / 49).66 (29.7%) of 222 shower water samples were positive for Legionella pneumophila.The main serotypes were Lp1,Lp3,Lp4,Lp6,Lp8,Lp10 and Lp12.Univariate analysis showed that there were significant differences in the detection of Legionella pneumophila among whether there were mixing tanks,whether the water storage equipment was cleaned and disinfected regularly,and whether the shower nozzle was disinfected regularly(χ²=22.909,P＜0.001;χ²=13.088,P＜0.001;χ²=16.195,P＜0.001;χ²=28.203,P＜0.001).Unconditional stepwise logistic regression analysis showed that mixed water tank increased the risk of Legionella pneumophila detection (OR=4.717,95% CI:1.017-21.866),and regular disinfection of water storage equipment could reduce the risk of Legionella pneumophila contamination (OR=0.201,95%CI:0.046-0.881). Conclusion Legionella pneumophila contamination exists in shower water of bathing places in Ma'anshan City,which is closely related to the installation of mixing tanks,regular disinfection of water storage equipment.Relevant departments should pay enough attention to it.