根据《安全饮用水法》（SDWA），现有和即将出台的法规要求公共水系统提供更高程度的微生物灭活和腐蚀控制，同时尽量减少消毒副产物（DBP）。这些目标相互冲突。Pawtucket供水委员会（PWSB）分配系统中收集的历史水质数据表明，三卤甲烷总量将超过建议的消毒剂/消毒副产物规则（D/DBPR）第二阶段最大污染物限值，并且原水总有机碳（TOC）水平可能需要加强混凝，这反过来可能会影响PWSB索赔CT的能力预氯化信用。 为了确保符合即将到来的D/DBPR，同时保持符合现有SDWA要求，PWSB的27 mgd常规水处理厂进行了替代DBP控制方法的中试工厂研究。溶解气浮（DAF）是一种替代高速澄清工艺，有可能取代现有未覆盖的沉淀池。对接触过滤进行了试验，以确定在未来可能更换沉淀池的过程中，是否可以保持出水水质。

Under the Safe Drinking Water Act (SDWA), existing and upcoming regulations require public water systems to provide a higher degree of microorganism inactivation and corrosion control while at the same time minimizing disinfection byproducts (DBPs). These goals conflict with each other. Historical water quality data collected in the Pawtucket Water Supply Board's (PWSB's) distribution system indicated that total trihalomethanes would exceed the proposed Disinfectant/Disinfection Byproduct Rule (D/DBPR) Stage II maximum contaminant limit and that raw water total organic carbon (TOC) levels may require enhanced coagulation which in turn may affect the PWSB's ability to claim CT credit for prechlorination. To ensure compliance with the upcoming D/DBPR, while maintaining compliance with existing SDWA requirements, pilot plant studies of alternative DBP control methodologies were performed at the PWSB's 27 mgd capacity conventional water treatment plant. Dissolved air flotation (DAF) was explored as an alternative high-rate clarification process to potentially replace the existing uncovered sedimentation basin. Contact filtration was piloted to determine if effluent water quality could be maintained during the potential future replacement of the sedimentation basin.