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DETERMINATION OF NEWLY IDENTIFIED DISINFECTION BY-PRODUCTS IN DRINKING WATER
Citation:
Gonzalez, A. C., S. W. Krasner, H. S. Weinberg, AND S D. Richardson. DETERMINATION OF NEWLY IDENTIFIED DISINFECTION BY-PRODUCTS IN DRINKING WATER. Presented at American Water Works Association Water Quality Technical Conference, Salt Lake City, UT, November 5-9, 2000.
Impact/Purpose:
Determine the actual concentrations of suspected health-impacting DBPs produced using non-chlorine disinfectants, how often they occur, under what conditions they are formed, and their fate and transport in the distribution system.
Description:
The Metropolitan Water District of Southern California (MWDSC) is investigating the occurrence of 39 newly identified disinfection by-products (DBPs)-which were not included in the Information Collection Rule (ICR)-in drinking waters. Halomethanes (HMs), haloacetonitriles (HANs), haloketones (HKs), haloacetaldehydes (HAs), halonitromethanes (HNMs), and miscellaneous organic compounds listed in Table I comprise the list of target analytes to be measured at MWDSC. This list includes DBPs that were selected by toxicologists from approximately 600 to 700 DBPs reported in the literature that may have possible adverse health effects. The project was done in collaboration with the University of North Carolina (UNC) and the U.S. Environmental Protection Agency (USEPA). Current research at MWDSC focuses on developing analytical methods for the determination of the target analytes in water samples, and on preservation of the analytes between the point of sampling and their analysis at the laboratory. Objectives beyond methods development include the investigation of occurrence of these DBPs in drinking waters; and the determination of the influence of water quality parameters, treatment, and distribution system conditions on their concentrations, persistence and stability.