Distribution System Comprehensive Performance Evaluation

During the week of September 8th, members of the Optimization Team, in partnership with the EPA Region 6 and Arkansas Department of Health (ADH), conducted a field event to support the development of a Distribution System Comprehensive Performance Evaluation (DS CPE) for chloraminated water systems. The DS CPE protocol was originally developed for water systems that use free chlorine as a secondary disinfectant. As a result, the existing DS CPE protocol is in the process of being modified to apply to chloraminated water systems, which was supported by the findings and experience gained from this event. The field event was hosted by two systems, Marion County Regional Water District, a parent system, and Yellville Water Works, one of their six consecutive systems. Typically DS CPEs are only conducted at a single water system, so this event allowed the unique opportunity of implementing the tool at two systems with a parent-consecutive system relationship. Both systems welcomed the feedback from the team during the exit meeting and the Optimization Team will request updates on their mutual pursuit of optimization from ADH staff. (Matthew Alexander, Alison Dugan, & Tom Waters, US EPA TSC)

Aim High Campaign Finalist

On September 17th, members of the optimization team from TSC and Region 4 participated in a video teleconference with Administrator McCarthy to discuss the Public Health Protection and Water Efficiency through the Drinking Water Optimization Program. This project, along with four others, was selected as a finalist in the Aim High Campaign on Protecting Water: A Precious, Limited Resource. The optimization project highlighted Area Wide Optimization Program (AWOP) efforts within the Region 4 states and a tribal system to effectively implement an enhanced backwashing procedure (Extended Terminal Subfluidization Wash, or ETSW). ETSW can significantly improve finished water quality and often has a secondary benefit of water savings during filter backwash. One example cited was from the State of Alabama, where AWOP efforts resulted in an annual savings of 500 million gallons of water among 14 water treatment plants. The Administrator appreciated that this work has a direct impact on public health protection, in addition to the resulting water savings. (Alison Dugan & Rick Lieberman, US EPA TSC)