Drinking water disinfection by-products in Wuhan urban area for 2023-2024
10.3969/j.issn.1006-2483.2026.02.028
- VernacularTitle:2023—2024年武汉城区饮用水消毒副产物监测分析
- Author:
Qin WANG
1
;
Yixuan WANG
1
;
Junling JUNLING
1
;
Feng PAN
1
Author Information
1. Wuhan Center for Disease Control and Prevention, Wuhan, Hubei 430024, China
- Publication Type:Journal Article
- Keywords:
Chlorination disinfection by-products;
Health risk assessment;
Drinking water;
Halogenated methane;
Haloacetic acid
- From:
Journal of Public Health and Preventive Medicine
2026;37(2):128-131
- CountryChina
- Language:Chinese
-
Abstract:
Objective To monitor the concentrations of six disinfection byproducts including trichloromethane,dibromochloromethane,bromodichloromethane, tribromomethane, dichloroacetic acid and trichloroacetic acid in drinking water in the main urban area of Wuhan, and to assess the potential health risks. Methods A total of 373 samples were collected from the central urban area during 2023 to 2024. The concentrations of the substances were tested according to the national Standard Examination Methods for Drinking Water. The detection rates of the six disinfection byproducts were statistically analyzed, and the concentration differences of the six disinfection byproducts in different time periods and different types of water samples were compared. The health risk assessment model recommended by the United States Environmental Protection Agency was used for risk assessment. Results Trichloromethane was the most common substance found in drinking water, followed by dichlorobromomethane, chlorodibromomethane, trichloroacetic acid, tribromomethane, and finally dichloroacetic acid. The concentration of dichlorobromomethane in treated water was higher than that in tap water, while the concentration of dichloroacetic acid was lower than the tap water, both with significant differences. The concentrations of the six chlorination disinfection by-products in the dry season were all significantly higher than those in the wet season. The carcinogenic risks of the disinfection byproducts were trichloroacetic acid > dichloroacetic acid > dichlorobromomethane > chlorodibromomethane > tribromomethane, and the non-carcinogenic risks were trichloromethane > trichloroacetic acid > dichlorobromomethane > chlorodibromomethane > dichloroacetic acid > tribromomethane. Conclusion Trichloroacetic acid is the substance with the highest carcinogenic risk, while trichloromethane is the non-carcinogenic substance with the highest risk, which requires special attention.
