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Unregulated Contaminant Monitoring Rule 2 (UCMR 2), (2008-2010) Occurrence Data

Published by U.S. EPA Office of Water (OW) - Office of Ground Water and Drinking Water (OGWDW) | U.S. Environmental Protection Agency | Catalog Last Checked: May 01, 2026 at 06:08 PM | Dataset Last Updated: January 04, 2007
The Unregulated Contaminant Monitoring Rule supporting the second cycle (UCMR 2) of monitoring, conducted under EPA oversight, was published in the Federal Register on January 4, 2007. The UCMR 2 required monitoring for 25 contaminants using five analytical methods.

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