Frequent Questions

How does EPA?s continued work with stakeholders to evaluate and fill the data gaps for other groups of interest for drinking water relate to the decision to revise the drinking water standards for TCE and PCE?

TCE and PCE are volatile organic compounds used in industrial and/or textile processing. In March, 2010, EPA determined that scientific advances allow for stricter regulations for these carcinogenic compounds and announced that the agency would initiate rulemaking efforts to revise the standards using the strategy’s framework. Both of these contaminants will be included in the new VOC drinking water standard under development. The current Maximum Contaminant Levels (MCLs) for both of these contaminants are 0.005 milligrams per liter.

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