Monitoring the Occurrence of Unregulated Drinking Water Contaminants
EPA collects data for chemicals and microbes that may be present in drinking water, but are not currently subject to EPA drinking water regulations. Learn about the Unregulated Contaminant Monitoring Rule.
About Monitoring Unregulated Drinking Water Contaminants
Occurrence and Reporting Data
Important Dates for UCMR 5
- January 15, 2021 – Laboratory Approval Program starts for UCMR 5.
- January 15, 2021 – Ground Water Representative Monitoring Plan Program starts for UCMR 5.
- April 6 and 7, 2021 – Public webinar meeting on Revisions to the Unregulated Contaminant Monitoring Rule for the Fifth Monitoring Cycle (UCMR 5)