Starting in 2020 with supplemental funding under the Tribal Public Water System Supervision (Tribal PWSS) Grant Program, the EPA conducted a limited, voluntary program to better understand the occurrence of PFAS in Tribal drinking water systems. This monitoring effort provided information to the EPA, Tribal leaders, and community members about PFAS occurrence in drinking water in select systems.
On April 26, 2024, the EPA finalized National Primary Drinking Water Regulations (NPDWRs) for six PFAS in drinking water. The NPDWRs promulgated maximum contaminant level goals as well as enforceable maximum contaminant levels for PFAS. The final rule became effective on June 25, 2024. Water systems must comply with the final rule initial monitoring requirements by April 26, 2027 and as such must submit PFAS monitoring data to their primacy agency to meet these requirements.
As of January 14, 2025 the EPA is no longer accepting new voluntary monitoring data through the PFAS Tribal Monitoring website. This website was developed prior to finalization of the PFAS NPDWR to provide information on the ongoing voluntary PFAS monitoring taking place in Tribal systems. Because the PFAS NPDWR has been finalized, systems are required to submit regulatory monitoring data to their primacy agency to fulfill rule requirements moving forward.
The EPA will maintain data submitted and uploaded to the PFAS Tribal Monitoring website prior to January 14, 2025 which can be accessed on this page. The EPA notes that data included in the PFAS Tribal Monitoring dataset is not representative of all PFAS monitoring data collected at Tribal public water systems to date.
If you have any questions about data submission to comply with requirements for the final PFAS NPDWR, please contact your EPA Region for assistance:
https://www.epa.gov/tribaldrinkingwater/regional-tribal-drinking-water-coordinators
