Two interrelated regulations promulgated in January 2006 by the US Environmental Protection Agency (USEPA)—the Long-Term 2 Enhanced Surface Water Treatment Rule (LT2ESWTR) and the Stage 2 Disinfectants/Disinfection Byproducts Rule (D/DBPR)—have raised concerns of water treatment professionals throughout the United States: Who is affected by the rules? What must utilities do to comply? When do various parts of the rules take effect?
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