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AWWA ACE59968
- Simultaneous Compliance with the D/DBP Rule and IESWTR
- Conference Proceeding by American Water Works Association, 06/17/2004
- Publisher: AWWA
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The Cornell University Water Filtration Plant (CUWFP) in Ithaca, New York is a 3.6 mgd conventionalfiltration plant treating a "flashy" creek source. In 2002, the fourth-quarter running annual average (RAA)haloacetic acids (HAA5) concentration was 65 ug/L. This exceeded the Stage 1 Disinfectants/Disinfection Byproducts (D/DBP) Rule maximum contaminant level (MCL) of 60 ug/L and requireddisinfection profiling and benchmarking under the Interim Enhanced Surface Water Treatment Rule(IESWTR). This paper discusses alternatives for compliance, including alternate disinfectants and enhancedcoagulation. Through the disinfection profiling and benchmarking effort and coordination with the localhealth department, modifications were made to the existing disinfection practices and a monitoringprogram implemented to assess the efficacy of the change. The modifications were successful in reducingthe RAA HAA5 concentration to below the MCL without impacting the microbiological quality. Thispaper discusses the challenges of Cornell simultaneously dealing with two interrelated drinking waterregulations at the same time. Includes tables, figures.
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