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The Unregulated Contaminant Monitoring Regulation supporting the second cycle (UCMR 2) of monitoring was signed on December 20, 2006. The UCMR 2 requires monitoring for 25 contaminants using five analytical methods during 2008-2010. Together EPA, the States, laboratories and public water systems (PWSs) are participating in UCMR 2.
Federal Register Notice: Revisions to the Unregulated Contaminant Monitoring Regulation (UCMR) for Public Water Systems
- January 4, 2007 Federal Register Notice
- January 30, 2007 FR Correction to January 26th FR: Unregulated Contaminant Monitoring Regulation (UCMR) for Public Water Systems Revisions
- January 26, 2007 FR Correction: Unregulated Contaminant Monitoring Regulation (UCMR) for Public Water Systems Revisions
Similarly to UCMR 1, UCMR 2 includes both Assessment and Screening Survey monitoring. Additionally, EPA is coordinating a laboratory approval program for the selected contaminants.
- Assessment Monitoring uses common analytical method technologies used by drinking water laboratories. All PWSs serving more than 10,000 people, and 800 representative PWSs serving less than 10,001 people are required to monitor for the 10 “List 1” contaminants during a 12-month period between January 2008-December 2010.
- Screening Survey monitoring uses specialized analytical method technologies not commonly used by drinking water laboratories. All PWSs serving more than 100,000 people, 320 representative PWSs serving 10,001-100,000 people, and 480 representative PWSs serving less than 10,001 people are required to monitor for the 15 “List 2” contaminants during a 12-month period between January 2008-December 2010.
- The Laboratory Approval Program requires that laboratories have EPA approval to analyze samples for UCMR 2.
- Basic Information - Basic information and overview of the UCMR 2 program.
- Regulation - Links to the final regulation and supporting documents.
- Contaminant List - List of contaminants in UCMR 2.
- Water Systems - Useful information for water systems that are monitoring for UCMR 2
- Reporting - Information for audiences participating in UCMR 2.
- Methods - List of contaminants and corresponding analytical methods in UCMR 2.
- Laboratories - List of approved laboratories and information outlining the laboratory approval process.
- Meetings & Materials - Materials from meetings held on UCMR issues.