OCCUPATION AND HEALTH ›› 2026, Vol. 42 ›› Issue (17): 2394-2398.

• Treatise——Environment and Health • Previous Articles     Next Articles

Monitoring and analysis of trihalomethanes concentration in terminal tap water and health risk assessment via multi-pathway exposure in Jiangyin City

ZHANG Li1, CHEN Jun1, JIN Yuxing1, MIAO Guozhong1, DING Xinliang2, HUANG Chunhua2()   

  1. 1 Jiangyin Center for Disease Control and PreventionJiangyinJiangsu 214400, China
    2 Wuxi Center for Disease Control and PreventionWuxiJiangsu 214001, China
  • Received:2025-07-07 Revised:2025-11-27 Online:2026-09-01 Published:2026-08-14
  • Contact: HUANG Chunhua E-mail:386973806@qq.com

Abstract:

Objective To analyze the concentration characteristics of trihalomethanes(THMs) in terminal tap water in Jiangyin City and evaluate the health risks associated with multi-pathway exposure,thereby providing a theoretical basis for ensuring drinking water safety in Jiangyin City. Methods From April 2023 to March 2025,terminal water samples were collected from various towns and subdistricts in Jiangyin City,and the concentrations of four THM species-chloroform(TCM),bromodichloromethane(BDCM),dibromochloromethane(DBCM),and bromoform(TBM) were measured. Health risks were assessed using the health risk model recommended by the U.S. Environmental Protection Agency(USEPA). Results From April 2023 to March 2025,a total of 408 terminal water samples were collected. The detection rates of TCM,BDCM,DBCM,and TBM were 100.0%,99.8%,98.8%,and 12.5%,respectively,with compliance rates of 100% for all compounds. The total exposure carcinogenic risks of TCM and BDCM were within acceptable low-risk ranges,while the risks of DBCM and TBM were negligible. The non-carcinogenic risks of all four THMs were below 1. Conclusion Although the concentrations of the four THMs in terminal tap water of Jiangyin City were relatively low,continuous attention is warranted,particularly for TCM and BDCM. It is recommended to prioritize these compounds in future monitoring programs.

Key words: Terminal tap water, Monitoring, Trihalomethanes, Multi-pathway exposure, Carcinogenic risk, Non-carcinogenic risk

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