This project reviewed the drinking water management of other contraries and international organization and proposed some implement suggestions for microbial parameter regulation in drinking water. This project implement contaminants screening process of drinking water quality regulation. Six unregulated contaminants (Vanadium, Tungsten, Lithium, Rubidium, Strontium, Titanium) were selected from Universe Contaminant Candidate List. Their concentration were monitored in four representative drinking water treatment plants, and their health risk in drinking water system in Taiwan were evaluated. Monitoring results showed that these six compounds except for Lithium didn’t result in significant health risk in drinking water system in Taiwan. Lithium was suggested to be including into Preliminary Contaminant Candidate List. This project also collected the monitoring histories of unregulated contaminants in Preliminary Contaminant Candidate List and Contaminant Candidate List, and proposed unregulated contaminants monitoring suggestions. In addition, this project inspected 39 unregulated compounds of emerging concern in drinking water. Results of 28 compounds were all below detection limitation. The other compounds with detection values were at very low concentration level. Only one sample with higher per- and polyfluorinated chemicals (PFCs) concentration, therefore it is suggested to monitor PFCs continuously. Water safety plan is proposed to manage Drinking water globally. This project also help the implement of the water safety plan. Besides, this project evaluate the effect of the material used in distribution system on drinking water quality. It is suggest to regulate the material used in drinking water system to reduce potential contamination source.

Heavy metal, Water Safty Plan, microbial indicator