PFAS · EPA UCMR5 monitoring
PFNA in drinking water
Water Around keeps occurrence monitoring, regulatory compliance, and household tap conditions separate. A reported detection is not by itself a violation, and a non-detection means only that the compound was not detected above that sample’s reporting limit.
PFNA drinking-water limits and regulations
The 2024 final rule sets a maximum contaminant level of 10 ng/L; a 2026 proposal would rescind this provision. Water Around does not treat a proposal as a completed rule change.
EPA context checked September 16, 2026: the 2024 final rule sets PFOA and PFOS limits at 4 ng/L (4 parts per trillion) each. EPA’s May 18, 2026 proposals would retain those limits, allow eligible systems more compliance time, and rescind other PFAS provisions. Those proposals are not final rules. Compliance uses the applicable monitoring framework, including running annual averages; a single occurrence sample is not a compliance finding.
Open EPA’s PFAS rule contextOther compounds in the monitoring program
Systems with detailed testing records
These systems have detailed testing records. Being listed here does not mean a system detected PFNA.