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UCMR occurrence data (UCMR 1-5, incl. PFAS and lithium in UCMR 5)

Whether unregulated contaminants (UCMR 5 is mostly PFAS) were found in local drinking water and at what level

UCMR occurrence data (UCMR 1-5, incl. PFAS and lithium in UCMR 5) is published by US Environmental Protection Agency for United States. It's a bulk download; its update schedule isn't stated, last updated 2026-10-15. Reuse: check terms. Check status: verified.

UpdatesNot stated
Last updated2026-10-15
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About this source

PublisherUS Environmental Protection Agency
Originalhttps://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule ↗
PlaceUnited States · federal
ShelfWater
FormatsXLSX, zipped TXT, Access (older UCM-State rounds)
Update ratePer round. UCMR 5 monitoring 2023-2025; final dataset…
Located byWater system / sampling point
Licencenot stated
CheckedVerified: opened and matched by a person or our reviewer

Cite this source: US Environmental Protection Agency, “UCMR occurrence data (UCMR 1-5, incl. PFAS and lithium in UCMR 5)”, https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule, last updated 2026-10-15. Listed by SOS.city at https://sos.city/source/618 (verified).

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