Fort Bragg Linden Oaks

PFAS monitoring results for a public water system in North Carolina

NC5043001UCMR 5EPA monitoring data
11Highest PFOA result, ppt
14Highest PFOS result, ppt
0.413Highest Hazard Index
240Results
PWSID
NC5043001
State
North Carolina
System type
community water system (CWS)
Population served
3,733
City
Fort Bragg
Counties
Harnett County, Moore County
Primary source water
surface water (purchased)
UCMR 5 sampling
2023-03-14 to 2024-04-23 · 2 entry point(s) · water types: SW
Service-area boundary
EPA-modeled (Decision Tree) — approximate: estimated by EPA with a statistical model, not a surveyed service area

PFOS ≥ 3 × its limit highest single result
PFOS 1–3 × its limit worst entry-point average

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

  • 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

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 resultWorst entry-point average*Limit
PFOA (ppt)118.124
PFOS (ppt)1411.354
Hazard Index0.4130.2811.0†

“<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 2023-03-14 to 2024-04-23 · 2 entry point(s) · water types: SW · 13 sampling visits. PFAS in ppt (ng/L).

DateEntry pointEventPFOAPFOSHIOther detections
2023-03-14BRAGG COMMUNITIES/NTA (SW)SE17.510.30.353PFBA 10, PFHpA 4.1, PFHxA 8.2, PFPeA 7.6
2023-03-14BRAGG COMMUNITIES/NTA (SW)SE17.810.50.363PFBA 10.5, PFHpA 4.1, PFHxA 8.5, PFPeA 7.6
2023-06-14BRAGG COMMUNITIES/NTA (SW)SE28.911.70.413PFBA 8.1, PFHpA 4.6, PFHxA 10.8, PFPeA 10.5
2023-06-14BRAGG COMMUNITIES/NTA (SW)SE2n/an/an/anone
2023-07-31BRAGG COMMUNITIES/NTA (SW)SE28130.343PFBA 10.2, PFHpA 4.4, PFHxA 8.8, PFPeA 11.3
2023-08-14BRAGG COMMUNITIES/NTA (SW)SE2n/an/an/anone
2023-09-12BRAGG COMMUNITIES/NTA (SW)SE39.9140.357PFBA 9.3, PFHpA 4.7, PFHxA 12, PFPeA 13
2023-09-12BRAGG COMMUNITIES/NTA (SW)SE311130.316PFBA 11, PFHpA 6, PFHxA 14, PFPeA 14
2023-12-12BRAGG COMMUNITIES/NTA (SW)SE4n/an/an/anone
2023-12-12BRAGG COMMUNITIES/NTA (SW)SE4n/an/an/anone
2024-01-29BRAGG COMMUNITIES/NTA (SW)SE4n/an/an/anone
2024-04-23BRAGG COMMUNITIES/NTA (SW)SE45.89.20PFHxA 5.3, PFPeA 5
2024-04-23BRAGG COMMUNITIES/NTA (SW)SE45.78.90PFHxA 5.1, PFPeA 5

“<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

240 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.

BRAGG COMMUNITIES/NTA facility S01 · sample point EP1 · surface water

CompoundMRL2023-03-14
SE1
2023-06-14
SE2
2023-09-12
SE3
2023-12-12
SE4
2024-01-29
SE4
2024-04-23
SE4
PFBA5 ppt108.19.3––< 5
PFBS3 ppt5.36.715––< 3
PFHpA3 ppt4.14.64.7––< 3
PFHxA3 ppt8.210.812––5.3
PFHxS3 ppt3.54.13.5––< 3
PFOA4 ppt7.58.99.9––5.8
PFOS4 ppt10.311.714––9.2
PFPeA3 ppt7.610.513––5
11Cl-PF3OUdS5 ppt< 5< 5< 5––< 5
4:2 FTS3 ppt< 3< 3< 3––< 3
6:2 FTS5 ppt< 5< 5< 5––< 5
8:2 FTS5 ppt< 5< 5< 5––< 5
9Cl-PF3ONS2 ppt< 2< 2< 2––< 2
ADONA3 ppt< 3< 3< 3––< 3
HFPO-DA5 ppt< 5< 5< 5––< 5
NEtFOSAA5 ppt< 5< 5< 5–< 5–
NFDHA20 ppt< 20< 20< 20––< 20
NMeFOSAA6 ppt< 6< 6< 6–< 6–
PFDA3 ppt< 3< 3< 3––< 3
PFDoA3 ppt< 3< 3< 3––< 3
PFEESA3 ppt< 3< 3< 3––< 3
PFHpS3 ppt< 3< 3< 3––< 3
PFMBA3 ppt< 3< 3< 3––< 3
PFMPA4 ppt< 4< 4< 4––< 4
PFNA4 ppt< 4< 4< 4––< 4
PFPeS4 ppt< 4< 4< 4––< 4
PFTA8 ppt< 8< 8< 8–< 8–
PFTrDA7 ppt< 7< 7< 7–< 7–
PFUnA2 ppt< 2< 2< 2––< 2
lithium9 µg/L< 9< 9< 9< 9––

BRAGG COMMUNITIES/NTA facility S01B · sample point EP2 · surface water

CompoundMRL2023-03-14
SE1
2023-06-14
SE2
2023-07-31
SE2
2023-08-14
SE2
2023-09-12
SE3
2023-12-12
SE4
2024-04-23
SE4
PFBA5 ppt10.5–10.2–11–< 5
PFBS3 ppt5.4–5.9–12–< 3
PFHpA3 ppt4.1–4.4–6–< 3
PFHxA3 ppt8.5–8.8–14–5.1
PFHxS3 ppt3.6–3.4–3.1–< 3
PFOA4 ppt7.8–8–11–5.7
PFOS4 ppt10.5–13–13–8.9
PFPeA3 ppt7.6–11.3–14–5
11Cl-PF3OUdS5 ppt< 5–< 5–< 5–< 5
4:2 FTS3 ppt< 3–< 3–< 3–< 3
6:2 FTS5 ppt< 5–< 5–< 5–< 5
8:2 FTS5 ppt< 5–< 5–< 5–< 5
9Cl-PF3ONS2 ppt< 2–< 2–< 2–< 2
ADONA3 ppt< 3–< 3–< 3–< 3
HFPO-DA5 ppt< 5–< 5–< 5–< 5
NEtFOSAA5 ppt< 5––< 5< 5< 5–
NFDHA20 ppt< 20–< 20–< 20–< 20
NMeFOSAA6 ppt< 6––< 6< 6< 6–
PFDA3 ppt< 3–< 3–< 3–< 3
PFDoA3 ppt< 3–< 3–< 3–< 3
PFEESA3 ppt< 3–< 3–< 3–< 3
PFHpS3 ppt< 3–< 3–< 3–< 3
PFMBA3 ppt< 3–< 3–< 3–< 3
PFMPA4 ppt< 4–< 4–< 4–< 4
PFNA4 ppt< 4–< 4–< 4–< 4
PFPeS4 ppt< 4–< 4–< 4–< 4
PFTA8 ppt< 8––< 8< 8< 8–
PFTrDA7 ppt< 7––< 7< 7< 7–
PFUnA2 ppt< 2–< 2–< 2–< 2
lithium9 µg/L< 9< 9––< 9< 9–

Statistics by compound

CompoundResultsDetectedHighest (date)Mean boundsKM medianP75P90P95
PFHxA8100%14
2023-09-12
9.09–9.098.510.81414
PFOA8100%11
2023-09-12
8.07–8.077.88.91111
PFOS8100%14
2023-09-12
11.32–11.3210.5131414
PFPeA8100%14
2023-09-12
9.25–9.257.611.31414
PFBA875%11
2023-09-12
7.39–8.649.310.21111
PFBS875%15
2023-09-12
6.29–7.045.46.71515
PFHpA875%6
2023-09-12
3.49–4.244.14.666
PFHxS875%4.1
2023-06-14
2.65–3.43.43.54.14.1

Never detected (22): 11Cl-PF3OUdS, 4:2 FTS, 6:2 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.