This document was developed by the United States Environmental Protection Agency (EPA) to provide an overview of the requirements for public water systems (PWSs) during the second 5- year cycle of the Unregulated Contaminant Monitoring Regulation (UCMR 2), which was published January 4, 2007 (72 FR 368). This document integrates the most essential elements of UCMR 2, including: program design; monitoring and reporting requirements; and the roles and responsibilities of large PWSs (i.e., those serving more than 10,000 people). This document does not focus on small PWS (i.e., those serving less than 10,001 people) requirements in as much detail because EPA is coordinating the small system testing program, providing assistance, and paying for the testing and sample shipping expenses. In addition, this document provides reference to other UCMR resources, accessible through the UCMR 2 Web site. This document briefly describes the Safe Drinking Water Act (SDWA) provisions for the UCMR program and the EPA regulations which establish legally binding requirements. However, this document does not substitute for those provisions or regulations, and does not impose legally-binding requirements on EPA, States, or the regulated PWSs.

"EPA-815-R-06-016." "December 2006." Cover title.

"This document was developed by the United States Environmental Protection Agency (EPA) to provide an overview of the requirements for public water systems (PWSs) during the second 5-year cycle of the Unregulated COntaminant Monitoring Regulation (UCMR 2), which was published January 4, 2007 (72 FR 368). --from page 7.