Hosted by US Environmental Protection Agency
This presentation will discuss research that has expanded our knowledge of inorganic chloramine decomposition chemistry. It will provide an updated understanding of 1) dichloramine decomposition and a revised pathway for N-nitrosodimethylamine (NDMA) formation in chloraminated drinking water; 2) how chloronitramide anion is a result of inherent chloramine instability; therefore, an external precursor chemical is not required for chloronitramide anion formation. The presentation will also discuss how chloronitramide anion was detected in 40 samples from 10 chloraminated drinking water systems in the United States, but not from ultrapure water or water treated without chlorine.
This work summarizes results from three recently published research articles: One in Science and two in Environmental Science & Technology. (Dave Wahman, EPA Office of Research and Development; Julian Fairey, University of Arkansas)