Abstract
This article discusses how the city of Phoenix responded to the U.S. Environmental Protection Agency's projection for lowering the maximum contaminant level for arsenic from 50 μg/L to 10 μg/L by January 2006 by commissioning the nation's first full‐scale arsenic removal facility for potable water in September 2003. The city built an arsenic treatment facility (ATF) as a demonstration project for identifying operational issues before it began removal technology at 15 city well sites having arsenic concentrations greater than 10 μg/L. The arsenic removal process uses a granular iron media adsorption process, and partial stream treatment is used to lower operation and maintenance costs.
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