UCMR5 Third Set of Data Released by EPA

The Environmental Protection Agency (EPA) has posted the third set of results from the Unregulated Contaminant Monitoring Rule 5 (UCMR5). Enclosed please find EPA’s summary of the results to date (ucmr5-data-summary_0).

Link to EPA Website with UCMR5 information and data files:

Text copied from the EPA website at the link above: “UCMR 5 was published in the Federal Register on December 27, 2021. UCMR 5 requires monitoring for 29 per- and polyfluoroalkyl substances (PFAS) and lithium. Sample collection under UCMR 5 will be from January 2023 through December 2025. The data released to date represent approximately 24% of the total results that the EPA expects to receive. Occurrence data will be updated on a quarterly basis until completion of data reporting in 2026. Data are added and possibly removed or updated over the course of this reporting cycle following further review by analytical laboratories, public water systems (PWSs), states, and the EPA.”

Another location with UCMR5 data (where you can download results in Excel file), here is link to EPA’s Data Finder Website for UCMR5 results: