Abstract：Objective To analyze the monitoring results of key occupational hazard factors in manufacturing enterprises in Jiading District, Shanghai Municipality, so as to provide a basis for differentiated occupational disease prevention and control. Methods In December 2025, data on key occupational hazard factors in monitored enterprises in Jiading District from 2020 to 2025 were collected through the Workplace Occupational Hazard Monitoring System, including enterprise size, industry type and economic ownership type. A descriptive analysis was conducted on the over-standard status of eight key occupational hazard factors, the configuration of protective facilities, the setup of warning signs, the distribution of personal protective equipment, and the results of occupational health examinations in manufacturing enterprises. Results A total of 359 manufacturing enterprises were monitored, with 3 182 monitoring positions and 661 over-standard positions, with an over-standard rate of 20.77%. The over-standard rate of noise was 43.54%, and over-standard rates were relatively high in large enterprises, automobile manufacturing industry and Hong Kong, Macao and Taiwan-invested enterprises, at 52.03%, 56.05% and 63.78%, respectively. The over-standard rate of silica dust was 13.57%, and the over-standard rates were relatively high in medium-sized enterprises, metal products industry and Hong Kong, Macao and Taiwan-invested enterprises, at 20.00%, 22.22% and 46.15%, respectively. The over-standard rate of welding fume was 0.91%, and over-standard rates were relatively high in small enterprises, metal products industry and Hong Kong, Macao and Taiwan-invested enterprises, at 1.21%, 2.94% and 7.69%, respectively. The over-standard rates of chemical factors ranged from 0 to 3.69%. Among them, the over-standard rates of toluene and xylene were relatively high in micro enterprises (6.82% and 6.67%). while the over-standard rate of manganese and its compounds was relatively high in small enterprises (1.05%). The over-standard rate of toluene was relatively high in the general equipment manufacturing industry (6.25%), the over-standard rate of xylene was relatively high in the special equipment manufacturing industry (20.00%), and the over-standard rate of manganese and its compounds was relatively high in the metal products industry (2.94%). The over-standard rate of toluene was relatively high in foreign-invested enterprises, at 3.06%; the over-standard rate of xylene was relatively high in domestic-invested enterprises, at 4.05%; and the over-standard rate of manganese and its compounds was relatively high in Hong Kong, Macao and Taiwan-invested enterprises, at 2.70%. The setting rates of protective facilities for noise, productive dust and chemical factors were 40.23%, 86.08% and 81.99%, respectively. The distribution rates of personal protective equipment were 93.29%, 88.29% and 71.38%, respectively. The rates of required re-examinations for noise, welding fume and benzene were relatively high, at 5.62%, 2.23% and 2.20%, respectively. With the exception of ethylbenzene, the completion rates of re-examinations for the other seven occupational hazard factors all exceeded 70.00%. The abnormal rate of noise-related physical examinations was relatively high, at 2.42%. Conclusions The over-standard rate of occupational hazard factor positions in manufacturing enterprises was relatively low in Jiading District. Noise and silica dust were the key targets for prevention and control. The setting rate of protective facilities and the distribution rate of personal protective equipment still need to be improved, and the overall completion rate of re-examinations was relatively high.
