AWWA MTC61089

In the absence of specific federal regulations or guidance for assigning microbial removal credits to alternative filtration technology (AFT) which include low-pressure membrane systems, many states over the past ten to fifteen years have developed individual programs to address this need. This paper presents a discussion of one such program developed by the California Department of Health Services' Drinking Water Program and provides discussion of how the state's approach may be altered by the recently proposed Long-term 2 Enhanced Surface Water Treatment Rule and the accompanying Membrane Guidance Manual. Includes 14 references, tables, figures.