By Cynthia Romero

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Extra info for Drinking Water and Unregulated Contaminants: Analyses of Epa Measures

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EPA officials told us that adding a contaminant to an ongoing analysis typically costs about $5 to $10. 46 This action plan also states that it can reasonably be anticipated that continued exposure to PFCs could harm human health. Due to industry’s increasing use of various PFCs, EPA included six of the chemicals identified in this plan in UCMR3, according to EPA officials. However, according to our analysis, five additional PFCs from the plan are among the eight that could have been detected using the same analytical method but are not on UCMR3.

Two contaminants—methyl bromide and 1,1dichloroethane—will likely wait 22 years after their initial listing for regulatory determinations. Without congressional action to make the statutory time frames more realistic, the time lag and resultant delays are expected to continue in subsequent cycles. The UCMR program faces other limitations that may cause EPA to base its regulatory determinations on inaccurate or outdated information. In particular, EPA’s standard monitoring frequency may not be accurately estimating the occurrence of certain contaminants in the public’s drinking water, particularly those that occur sporadically like viruses or seasonally like pesticides.

To identify experts 34 United States Government Accountability Office for the first round of the survey, we reviewed public comments provided on EPA’s proposed rules for its Contaminant Candidate Lists (CCL), UCMR, and preliminary regulatory determinations. We also reviewed public nominations of drinking water contaminants submitted to EPA and EPA documentation on two expert panels it convened to provide input and review of chemical and microbial contaminants for CCL3. We identified 14 experts from academia, an analytical laboratory, environmental advocacy organizations, professional associations, water utilities, and federal and state government agencies.

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