Monitoring Unregulated Contaminants in Drinking Water
Monitoring Unregulated Contaminants in Drinking Water
Current and Previous UCMRs
Reporting Requirements and Occurrence Data
The Safe Drinking Water Act requires that EPA establish requirements for PWSs to monitor for priority unregulated contaminants every five years and requires EPA to make the results publicly available.
Important Dates for UCMR 5
- March 2022 – Public webinar on the final Revisions to the Unregulated Contaminant Monitoring Rule for the Fifth Monitoring Cycle (UCMR 5).
- August 1, 2022 – Deadline for laboratories seeking approval to complete and submit the necessary registration form and application materials.
- December 31, 2022 – Deadline for large systems to update sampling location(s) and zip code(s). If applicable, the system may update their monitoring schedule; and small systems to update sampling location(s), shipping address, and zip code(s).