- PWSID
- NC0392055
- State
- North Carolina
- System type
- community water system (CWS)
- Population served
- 42,954
- City
- Fuquay-Varina
- Counties
- Wake County
- Primary source water
- surface water (purchased)
- UCMR 5 sampling
- 2023-08-14 to 2024-05-13 · 2 entry point(s) · water types: SW
- Service-area boundary
- authoritative
PFOA 1–3 × its limit highest single result
PFOS 1–3 × its limit worst entry-point average
Open on the North Carolina map · All North Carolina systems · All results
These are monitoring results collected under EPA's Fifth Unregulated Contaminant Monitoring Rule (UCMR 5) at entry points, where treated water enters the distribution system; they are not tap-water samples. They are not compliance determinations: compliance with EPA's 2024 PFAS limits is judged on running annual averages of compliance monitoring, required from 2029, so a single UCMR 5 result at or above a limit is not a violation. “< MRL” means the compound was not quantified at EPA's minimum reporting level; it does not mean zero.
Water purchased from
- Holly Springs, Town Of (NC0392050)
Seller's highest results: PFOA 5.9 ppt · PFOS 12 ppt · HI 0.322 · detected: PFBA;PFBS;PFHpA;PFHxA;PFHxS;PFOA;PFOS;PFPeA - Harnett Regional Water (NC0343045)
Seller's highest results: PFOA 7.7 ppt · PFOS 12.3 ppt · HI 0.312 · detected: PFBS;PFHpA;PFHxA;PFHxS;PFOA;PFOS;PFPeA - Raleigh, City Of (NC0392010)
Seller's highest results: PFOA <MRL · PFOS 5.6 ppt · HI 0.002 · detected: PFBA;PFBS;PFHxA;PFOS;PFPeA - Johnston Co-West (NC0351070)
Seller's highest results: PFOA 7.6 ppt · PFOS 14.1 ppt · HI 0.532 · detected: PFBA;PFBS;PFHpA;PFHxA;PFHxS;PFOA;PFOS;PFPeA
Seller results are the seller's own entry-point samples, not measurements of this system's water. This system's own samples (below) may reflect purchased water, its own sources, or both.
Compared with EPA's 2024 values
| Highest single result | Worst entry-point average* | Limit | |
|---|---|---|---|
| PFOA (ppt) | 11 | 8.45 | 4 |
| PFOS (ppt) | 11 | 8.8 | 4 |
| Hazard Index | 0.448 | 0.224 | 1.0† |
“<MRL” = every result for the compound was below its reporting limit. * Mean of all samples at each entry point with non-detects = 0 (EPA compliance convention; the Hazard Index also uses non-detects = 0); a screening comparison, not a formal running annual average. † Rescission proposed May 2026. PFOA/PFOS MCL 4 ppt (2024 NPDWR, in effect). PFHxS, PFNA, HFPO-DA (10 ppt each) and the Hazard Index (1.0) are 2024 NPDWR values; EPA proposed rescinding them on 18 May 2026 (comment period closed 20 Jul 2026).
No North Carolina PFAS drinking-water standard in effect or proposed as of 2026-10-17: No state PFAS drinking-water MCL in effect; S.B. 384 (2025) filed, not enacted; DEQ implementing federal NPDWR.
Sampling history
Sampled 2023-08-14 to 2024-05-13 · 2 entry point(s) · water types: SW · 8 sampling visits. PFAS in ppt (ng/L).
| Date | Entry point | Event | PFOA | PFOS | HI | Other detections |
|---|---|---|---|---|---|---|
| 2023-08-14 | Harnett County Water Intertie (SW) | SE1 | n/a | n/a | n/a | none |
| 2023-08-14 | Johnston County Water Intertie (SW) | SE1 | n/a | n/a | n/a | none |
| 2023-11-09 | Harnett County Water Intertie (SW) | SE2 | 11 | 11 | 0.448 | 6:2 FTS 5.9, PFBA 13, PFHpA 7, PFHxA 19, PFPeA 21 |
| 2023-11-09 | Johnston County Water Intertie (SW) | SE2 | 10 | 9.3 | 0.396 | PFBA 10, PFHpA 5.5, PFHxA 15, PFPeA 16 |
| 2024-02-15 | Harnett County Water Intertie (SW) | SE3 | 5.9 | 6.6 | 0 | PFBA 5.2, PFHxA 4.3, PFPeA 4.2 |
| 2024-02-15 | Johnston County Water Intertie (SW) | SE3 | 6.8 | 7.8 | 0.002 | PFBA 5.1, PFHpA 3.6, PFHxA 5, PFPeA 4.6 |
| 2024-05-13 | Harnett County Water Intertie (SW) | SE4 | n/a | n/a | n/a | none |
| 2024-05-13 | Johnston County Water Intertie (SW) | SE4 | n/a | n/a | n/a | none |
“<4” = not detected at the reporting limit shown; “n/a” = not analyzed in that sample. Highlighted = at or above the 4 ppt MCL. HI computed per sample with non-detects as 0. Other detections lists every other quantified compound (lithium in µg/L).
All results by entry point
140 results. Each column is one sampling visit (date and UCMR 5 sample event). A number is a measured concentration; “< 4” = below the minimum reporting level shown; “–” = not analyzed in that visit. PFAS in ppt (ng/L); lithium in µg/L.
Harnett County Water Intertie facility 40197 · sample point EP001 · surface water
| Compound | MRL | 2023-08-14 SE1 | 2023-11-09 SE2 | 2024-02-15 SE3 | 2024-05-13 SE4 |
|---|---|---|---|---|---|
| 6:2 FTS | 5 ppt | – | 5.9 | < 5 | – |
| PFBA | 5 ppt | – | 13 | 5.2 | – |
| PFBS | 3 ppt | – | 15 | < 3 | – |
| PFHpA | 3 ppt | – | 7 | < 3 | – |
| PFHxA | 3 ppt | – | 19 | 4.3 | – |
| PFHxS | 3 ppt | – | 4.4 | < 3 | – |
| PFOA | 4 ppt | – | 11 | 5.9 | – |
| PFOS | 4 ppt | – | 11 | 6.6 | – |
| PFPeA | 3 ppt | – | 21 | 4.2 | – |
| 11Cl-PF3OUdS | 5 ppt | – | < 5 | < 5 | – |
| 4:2 FTS | 3 ppt | – | < 3 | < 3 | – |
| 8:2 FTS | 5 ppt | – | < 5 | < 5 | – |
| 9Cl-PF3ONS | 2 ppt | – | < 2 | < 2 | – |
| ADONA | 3 ppt | – | < 3 | < 3 | – |
| HFPO-DA | 5 ppt | – | < 5 | < 5 | – |
| NEtFOSAA | 5 ppt | < 5 | < 5 | < 5 | < 5 |
| NFDHA | 20 ppt | – | < 20 | < 20 | – |
| NMeFOSAA | 6 ppt | < 6 | < 6 | < 6 | < 6 |
| PFDA | 3 ppt | – | < 3 | < 3 | – |
| PFDoA | 3 ppt | – | < 3 | < 3 | – |
| PFEESA | 3 ppt | – | < 3 | < 3 | – |
| PFHpS | 3 ppt | – | < 3 | < 3 | – |
| PFMBA | 3 ppt | – | < 3 | < 3 | – |
| PFMPA | 4 ppt | – | < 4 | < 4 | – |
| PFNA | 4 ppt | – | < 4 | < 4 | – |
| PFPeS | 4 ppt | – | < 4 | < 4 | – |
| PFTA | 8 ppt | < 8 | < 8 | < 8 | < 8 |
| PFTrDA | 7 ppt | < 7 | < 7 | < 7 | < 7 |
| PFUnA | 2 ppt | – | < 2 | < 2 | – |
| lithium | 9 µg/L | < 9 | < 9 | < 9 | < 9 |
Johnston County Water Intertie facility 70969 · sample point EP003 · surface water
| Compound | MRL | 2023-08-14 SE1 | 2023-11-09 SE2 | 2024-02-15 SE3 | 2024-05-13 SE4 |
|---|---|---|---|---|---|
| PFBA | 5 ppt | – | 10 | 5.1 | – |
| PFBS | 3 ppt | – | 12 | 3 | – |
| PFHpA | 3 ppt | – | 5.5 | 3.6 | – |
| PFHxA | 3 ppt | – | 15 | 5 | – |
| PFHxS | 3 ppt | – | 3.9 | < 3 | – |
| PFOA | 4 ppt | – | 10 | 6.8 | – |
| PFOS | 4 ppt | – | 9.3 | 7.8 | – |
| PFPeA | 3 ppt | – | 16 | 4.6 | – |
| 11Cl-PF3OUdS | 5 ppt | – | < 5 | < 5 | – |
| 4:2 FTS | 3 ppt | – | < 3 | < 3 | – |
| 6:2 FTS | 5 ppt | – | < 5 | < 5 | – |
| 8:2 FTS | 5 ppt | – | < 5 | < 5 | – |
| 9Cl-PF3ONS | 2 ppt | – | < 2 | < 2 | – |
| ADONA | 3 ppt | – | < 3 | < 3 | – |
| HFPO-DA | 5 ppt | – | < 5 | < 5 | – |
| NEtFOSAA | 5 ppt | < 5 | < 5 | < 5 | < 5 |
| NFDHA | 20 ppt | – | < 20 | < 20 | – |
| NMeFOSAA | 6 ppt | < 6 | < 6 | < 6 | < 6 |
| PFDA | 3 ppt | – | < 3 | < 3 | – |
| PFDoA | 3 ppt | – | < 3 | < 3 | – |
| PFEESA | 3 ppt | – | < 3 | < 3 | – |
| PFHpS | 3 ppt | – | < 3 | < 3 | – |
| PFMBA | 3 ppt | – | < 3 | < 3 | – |
| PFMPA | 4 ppt | – | < 4 | < 4 | – |
| PFNA | 4 ppt | – | < 4 | < 4 | – |
| PFPeS | 4 ppt | – | < 4 | < 4 | – |
| PFTA | 8 ppt | < 8 | < 8 | < 8 | < 8 |
| PFTrDA | 7 ppt | < 7 | < 7 | < 7 | < 7 |
| PFUnA | 2 ppt | – | < 2 | < 2 | – |
| lithium | 9 µg/L | < 9 | < 9 | < 9 | < 9 |
Statistics by compound
| Compound | Results | Detected | Highest (date) | Mean bounds | KM median | P75 | P90 | P95 |
|---|---|---|---|---|---|---|---|---|
| PFBA | 4 | 100% | 13 2023-11-09 | 8.32–8.32 | 5.2 | 10 | 13 | 13 |
| PFHxA | 4 | 100% | 19 2023-11-09 | 10.82–10.82 | 5 | 15 | 19 | 19 |
| PFOA | 4 | 100% | 11 2023-11-09 | 8.43–8.43 | 6.8 | 10 | 11 | 11 |
| PFOS | 4 | 100% | 11 2023-11-09 | 8.68–8.68 | 7.8 | 9.3 | 11 | 11 |
| PFPeA | 4 | 100% | 21 2023-11-09 | 11.45–11.45 | 4.6 | 16 | 21 | 21 |
| PFBS | 4 | 75% | 15 2023-11-09 | 7.5–8.25 | 3 | 12 | 15 | 15 |
| PFHpA | 4 | 75% | 7 2023-11-09 | 4.03–4.78 | 3.6 | 5.5 | 7 | 7 |
| PFHxS | 4 | 50% | 4.4 2023-11-09 | 2.08–3.58 | <MRL | 3.9 | 4.4 | 4.4 |
| 6:2 FTS | 4 | 25% | 5.9 2023-11-09 | 1.48–5.22 | <MRL | <MRL | 5.9 | 5.9 |
Never detected (21): 11Cl-PF3OUdS, 4:2 FTS, 8:2 FTS, 9Cl-PF3ONS, ADONA, HFPO-DA, NEtFOSAA, NFDHA, NMeFOSAA, PFDA, PFDoA, PFEESA, PFHpS, PFMBA, PFMPA, PFNA, PFPeS, PFTA, PFTrDA, PFUnA, lithium.
Left-censored Kaplan–Meier statistics (Helsel 2005; Helsel & Lee 2006, NADA for R). Units: ppt; lithium µg/L. Each compound has one reporting limit, so the Kaplan–Meier mean equals the upper mean bound (non-detects at the MRL); the lower bound sets non-detects to 0. “<MRL” = the percentile falls below the reporting limit and cannot be estimated. These describe this system's UCMR 5 samples, not population estimates.
Sources
- EPA UCMR 5 occurrence data text files (UCMR5_All.txt; samples 2023-01-09 to 2026-06-03; data summary dated Jul 2026)
- EPA SDWIS via ECHO SDWA downloads, quarter 2026Q3
- EPA Public Water System Service Areas v3 (Mar 2026)
- US Census Bureau cartographic boundary counties 1:500k, 2024
- EPA/USGS NHDPlus V2 (medium resolution) flowlines, Strahler order 2+
Data build 06b855374275 · 2026-10-18T04:10Z · UCMR 5 release Jul2026 · SDWIS 2026Q3. Data and methods.