Virginia PFAS results from EPA's final data
Report published Nov 14, 2026 · EPA UCMR 5 final data file of Oct 15, 2026 (samples collected 2023–2025) · Method · National results →
12 Virginia water systems serving 1.8 million people had PFAS above a 2024 federal limit in EPA's final round of nationwide PFAS testing: 7% of the 164 Virginia systems tested, compared with 11% nationally.
Highest PFOA or PFOS averages in Virginia
- Bealeton Regional Water System Warrenton · PFOA23.1 ppt
- New Baltimore Regional Water System New Baltimore · PFOS11.8 ppt
- Ncsa – Wintergreen Water System Arrington · PFOS11.7 ppt
- Town of Purcellville Purcellville · PFOA10.4 ppt
- Town of Round Hill Round Hill · PFOS8.35 ppt
- Quantico MCB-Camp Barrett Quantico · PFOS5.68 ppt
- Stafford County Utilities Stafford · PFOS5.22 ppt
- Prince William Water – East Woodbridge · PFOA5.03 ppt
- Western Virginia Water Authority Roanoke · PFOS4.75 ppt
- Fairfax County Water Authority Herndon · PFOA4.63 ppt
- Fort Belvoir Water System Fort Belvoir · PFOA4.5 ppt
- Dale City Water System Dale City · PFOA4.38 ppt
- Town of Hamilton Hamilton · PFOA3.05 ppt
- Town of Warrenton Warrenton · PFOA2.3 ppt
- City of Newport News Newport News · PFOS2.27 ppt
Chart data as a table
| System | ppt |
|---|---|
| Bealeton Regional Water System · Warrenton · PFOA | 23.1 |
| New Baltimore Regional Water System · New Baltimore · PFOS | 11.8 |
| Ncsa – Wintergreen Water System · Arrington · PFOS | 11.7 |
| Town of Purcellville · Purcellville · PFOA | 10.4 |
| Town of Round Hill · Round Hill · PFOS | 8.35 |
| Quantico MCB-Camp Barrett · Quantico · PFOS | 5.68 |
| Stafford County Utilities · Stafford · PFOS | 5.22 |
| Prince William Water – East · Woodbridge · PFOA | 5.03 |
| Western Virginia Water Authority · Roanoke · PFOS | 4.75 |
| Fairfax County Water Authority · Herndon · PFOA | 4.63 |
| Fort Belvoir Water System · Fort Belvoir · PFOA | 4.5 |
| Dale City Water System · Dale City · PFOA | 4.38 |
| Town of Hamilton · Hamilton · PFOA | 3.05 |
| Town of Warrenton · Warrenton · PFOA | 2.3 |
| City of Newport News · Newport News · PFOS | 2.27 |
Largest systems above a limit
| # | System | People served |
|---|---|---|
| 1 | Fairfax County Water Authority Herndon Above: PFOA | 1.1 million |
| 2 | Western Virginia Water Authority Roanoke Above: PFOS | 182,700 |
| 3 | Prince William Water – East Woodbridge Above: PFOA | 168,747 |
| 4 | Stafford County Utilities Stafford Above: PFOS | 123,684 |
| 5 | Dale City Water System Dale City Above: PFOA | 72,062 |
| 6 | Fort Belvoir Water System Fort Belvoir Above: PFOA | 39,303 |
| 7 | Town of Purcellville Purcellville Above: PFOA | 8,929 |
| 8 | New Baltimore Regional Water System New Baltimore Above: PFOS | 8,818 |
| 9 | Quantico MCB-Camp Barrett Quantico Above: PFOS | 8,689 |
| 10 | Ncsa – Wintergreen Water System Arrington Above: PFOA, PFOS | 6,861 |
All 12 Virginia systems above a limit
Every Virginia community water system whose UCMR 5 results averaged above a 2024 federal PFAS limit, largest first. Systems that were not tested are not listed: not tested is not the same as not detected.
Full list: 12 systems, largest first
| System | People served |
|---|---|
| Fairfax County Water Authority Herndon Above: PFOA | 1.1 million |
| Western Virginia Water Authority Roanoke Above: PFOS | 182,700 |
| Prince William Water – East Woodbridge Above: PFOA | 168,747 |
| Stafford County Utilities Stafford Above: PFOS | 123,684 |
| Dale City Water System Dale City Above: PFOA | 72,062 |
| Fort Belvoir Water System Fort Belvoir Above: PFOA | 39,303 |
| Town of Purcellville Purcellville Above: PFOA | 8,929 |
| New Baltimore Regional Water System New Baltimore Above: PFOS | 8,818 |
| Quantico MCB-Camp Barrett Quantico Above: PFOS | 8,689 |
| Ncsa – Wintergreen Water System Arrington Above: PFOA, PFOS | 6,861 |
| Town of Round Hill Round Hill Above: PFOA, PFOS | 5,055 |
| Bealeton Regional Water System Warrenton Above: PFOA, PFOS | 4,250 |
The same list, with PFOA and PFOS averages, is in the data download.
Which limits were exceeded
| PFAS | Federal limit | Systems above it |
|---|---|---|
| PFOA 1.4 million people | 4 ppt | 8 |
| PFOS 340,057 people | 4 ppt | 7 |
| PFHxS | 10 ppt | 0 |
| PFNA | 10 ppt | 0 |
| GenX (HFPO-DA) | 10 ppt | 0 |
| Hazard Index | 1 | 0 |
"–" in the table above means not detected. A system can be above more than one limit. EPA proposed in May 2026 to rescind the PFHxS, PFNA, GenX and Hazard Index limits. That proposal is not final.
Data and how to cite it
- Download every Virginia water system as CSV (PFOA and PFOS averages, systems above a limit, lead, violations).
- EPA's source file: UCMR 5 occurrence data.
Suggested citation:
Tap Water Results, "Virginia PFAS results from EPA's final UCMR 5 data" (published Nov 14, 2026, EPA data file of Oct 15, 2026). https://tapwaterresults.com/pfas/virginia/
You're welcome to quote and republish these figures with a link back. Questions from reporters: see contact.
Method
For each system we average each entry point's UCMR 5 results (non-detects count as zero, complete sets of samples only) and compare the highest entry-point average with the 2024 federal limit, using EPA's rounding. This is how EPA compares UCMR 5 results to the limits in its own data summary, and our national counts match EPA's published table within 2% (how we check). Results are monitoring data from 2023–2025, not compliance determinations, and treatment installed since then is not reflected. Full method.
Questions
How many Virginia water systems have PFAS above the limit?
12 of the 164 Virginia community water systems EPA tested in 2023–2025 (7%) had at least one entry-point average above a 2024 federal PFAS limit. They serve 1.8 million people. Nationally the share is 11%.
Are these systems violating the law?
Not yet. Systems have until 2029 to meet the 2024 limits, and EPA has proposed moving the PFOA and PFOS deadline to 2031 and rescinding the other limits. EPA's UCMR 5 results are monitoring data and do not determine compliance.
Which systems were tested?
EPA's UCMR 5 tested every community water system serving more than 3,300 people and a representative sample of smaller ones. Systems that were not tested have no federal result, which is not the same as having no PFAS.
All Virginia water systems → · National results → · PFAS results for every state →
Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.