Monitoring results of health hazard factors at hotels in Nantong, China, 2021

Objective To analyze the monitoring data of health hazard factors at hotels in Nantong, China, and to understand the environmental hygienic situation and main health hazard factors at hotels in Nantong.

Methods According to the Examination Method for Public Places (GB/T 18204), 18 hotels of different star ratings in Nantong were selected in 2021 to monitor physical factors, indoor air quality, microorganisms of public articles, and Legionella pneumophila in cooling water. The result were evaluated according to the Hygienic Indicators and Limits for Public Places (GB 37488-2019), the Standard of the Measurement and Evaluation for Efficiency of Building Ventilation (JGJ/T 309-2013), and the Hygienic Specification of Central Air Conditioning Ventilation System in Public Puildings (WS 394-2012).

Results In 2021, the qualified rates of indoor wind speed and CO, CO₂, benzene, and xylene in the air of hotels in Nantong all reached 100%. The qualified rates of toluene and the total number of colonies were all more than 90%. The qualified rates of PM_2.5 and PM₁₀ were between 80% and 90%. The qualified rates of noise, temperature, and humidity were 66.67%, 34.15%, and 38.21%, respectively. The qualified rates of indoor humidity and formaldehyde in the air were significantly lower in summer than that in winter (χ²=24.40, P < 0.05; χ²=9.60, P < 0.05). The qualified rate of indoor temperature in summer was significantly higher than that in winter (χ²=7.44, P < 0.05). The qualified rates of coliform bacteria and Staphylococcus aureus in public articles and L. pneumophila in cooling water were all 100%. The qualified rates of total colony count of towels and mouthwash cups were 98.78% and 92.78%, respectively. The qualified rate of pH value of towels was 37.10%. There were significant differences in the qualified rates of formaldehyde in indoor air, the pH value of towels, and the total colony count of mouthwash cups between hotels of different star rating levels (χ²=7.10, P < 0.05; χ²=110.27, P < 0.05; χ²=8.55, P < 0.05).

Conclusion The monitoring result of health hazard factors at hotels in Nantong in 2021 were generally satisfactory, but with relatively low qualified rates of indoor temperature, humidity, noise, pH values of towels, and formaldehyde, PM_2.5, and PM₁₀ in indoor air.