References 1 et al. Occurrence of Disinfection By-Products in U.S. Drinking Water. Jour. AWWA, 81:8: 41 (Aug. 1989). 2 Montgomery Consulting Engineers and Metropolitan Water District of Southern California. Disinfection By-Products in United States Drinking Waters. Vol. 1 Rept. USEPA and AWWA (1989). 3 & Controlling Organics: Why Now? Jour. AWWA, 70:11: 590 (Nov. 1978). 4 USEPA. Draft D/DBP Rule Language. Ofce. Ground Water and Drinking Water, USEPA, Washington, D.C. (1993).