DEQ PFAS Sampling of Public Water Systems

DEQ Sampling of Public Water Systems

In late 2022, DEQ performed three months of sampling at 50 municipal and county water systems identified in the 2019 PFAST Network study with PFOA/PFOS detections above the minimum reporting level indicated by the 2022 EPA interim health advisories.  

The two maps below include only DEQ data from PFOA and PFOS sampling at 50 municipal and county water systems over a three-month period in late 2022. The systems were selected for additional sampling based on PFAS detections during the 2019 NC Collaboratory PFAST Network sampling. The full data set is linked below the map. DEQ is working with systems on next steps to reduce PFAS and achieve future compliance with the proposed National Drinking Water regulations. 

Other public water systems are monitoring for PFAS voluntarily; however, their data is not reflected on this map.  DEQ recommends that public water systems share PFAS results with their customers. Customers should contact their specific water provider for more information.


Data Table - PFOA, PFOS, GenX

Data Table - 1,4 Dioxane


DEQ is also implementing plans to sample hundreds of smaller water systems to better assess the levels of PFAS on a statewide basis.