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Elsinore Valley Municipal Water District
Evaluating the Formation of Chloramine By-Products

 


 

The Elsinore Valley Municipal Water District blends four sources of water into its distribution system: local groundwater, local surface water, imported treated Colorado River Water, and imported treated California State Project Water. In 2001, the District decided to convert its distribution system from free chlorine to chloramine to comply with decreasing limits on the chlorine by-products: THMs and HAAs. The District retained the services of WQTS to quantify the anticipated reduction in the levels of THMs and HAAs formed after conversion, as well as the potential for the formation of new chloramine by-products, primarily N-nitrosodimethylamine (NDMA). WQTS staff conducted bench-scale testing of DBP formation with chlorine and chloramine from each of the District's water sources.

 
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