| 英文摘要 |
This year, the Ministry of Environment issued the "Guidelines for the Detection Management and Screening of Compounds of Emerging Concern in Drinking Water." Following these guidelines, this project conducts a screening for regulating substances in drinking water. Six halonitromethane disinfection by-products in the first category list were monitored and evaluated their presence and potential impact in drinking water supply systems in Taiwan. Three rounds of sampling and monitoring were conducted at six water treatment plants, with three of these disinfection by-products detected in trace amounts, posing no significant health risk. As for glyphosate, listed in the second category, sampling results this year showed slightly higher concentrations compared to previous years. It is recommended to clarify if this is related to sampling timing. Further sampling next year was sμggested to determine if it should be included in the third-category list. For substances in the third category list, this project reviewed historical data from local water treatment facilities, assessing tellurium, 1,2-dibromoethane, and NDMA, which were found to pose no significant risk in the nation’s drinking water and thus were reclassified to the second category to optimize testing resources. Additionally, the project analyzed 3,041 samples for 29 emerging, non-regulated contaminants in drinking water, and provided recommendations for future monitoring and management based on the results. A review was also conducted on pesticide and bacterial indicators in drinking water standards, along with an evaluation of the feasibility of formalizing non-mandatory standards or guidelines.
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