This article discusses a survey conducted by the New York City Department of Environmental Protection to assess the city's options for complying with the U.S. Environmental Protection Agency's Stage 2 Disinfectant and Disinfection Byproducts Rule. The survey asked 13 major U.S. water utilities to report their history of chloramine use, facilities used, dosages and chemicals used, operational procedures, environmental review required, public health impacts, advantages and disadvantages, and source water quality.

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Re‐activating abandoned groundwater supplies can help utilities meet increasing demands and address dwindling supplies, but it's important to carefully consider contaminant treatment options.

This article discusses a system design to minimize microfiltration membrane maintenance at the Westchester Joint Water Works in Mamaroneck, New York. Several cleaning steps were used to remove contaminants from membrane fibers and keep them free of fouling. Frequent air agitation, backpulsing, and deconcentration were used to remove solids from the fibers. More aggressive cleaning programs‐‐ maintenance and recovery cleaning‐‐ were used with chemicals to remove fouling. The wastes produced from each of these steps must be handled carefully and within the constraints of local utilities, available property, and capital/operational costs.