Monitoring Unregulated Contaminants in Drinking Water
The Safe Drinking Water Act requires that the EPA establish requirements for public water systems (PWSs) to monitor for priority unregulated contaminants every five years and requires the agency to make the results publicly available.
- Learn about the Unregulated Contaminant Monitoring Rule (UCMR)
- Meetings and Materials
- Reporting Requirements
UCMR Laboratory Approval
- UCMR 5 Laboratory Approval Program
- EPA Approved Laboratories for UCMR 5
- EPA Approved Laboratories for UCMR 3 and UCMR 4
Current and Previous UCMRs
- UCMR 5 (2022-2026)
- UCMR 4 (2017-2021)
- UCMR 3 (2012-2016)
- UCMR 2 (2007-2011)
- UCMR 1 (2001-2005)
- UCM-State Rounds 1&2 (1988-1997)
Click here to visit the EPA UCMR information web page.