Developing Aromatic DBPs as Improved Metrics for DBP Exposure

Recent findings from WRF Project 5140 show that THM4 and HAA5 contribute minimally to total toxicity, which is dominated by the >2 carbon fraction of DBPs. This project aims to evaluate halophenols and halonitrophenols as more accurate indicators of DBP exposure. Using high-resolution mass spectrometry (HRMS), their formation will be studied across different water qualities, disinfectants, and contact times. Findings will support utilities in targeting problem areas and selecting effective treatment strategies for improved public health protection. This work will provide a critical step toward more accurate, health-relevant DBP monitoring and exposure assessment.