- PWSID
- TX2210013
- State
- Texas
- System type
- community water system (CWS)
- Population served
- 7,183
- City
- Dyess Afb
- Counties
- Taylor County
- Primary source water
- surface water (purchased)
- UCMR 5 sampling
- 2025-01-22 to 2026-03-02 · 2 entry point(s) · water types: SW
- Service-area boundary
- authoritative
PFOS ≥ 3 × its limit highest single result
PFOS ≥ 3 × its limit worst entry-point average
Open on the Texas map · All Texas 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
- City Of Abilene (TX2210001)
Seller's highest results: PFOA 7.7 ppt · PFOS 30 ppt · HI 3.244 · detected: PFBA;PFBS;PFHpA;PFHxA;PFHxS;PFOA;PFOS;PFPeA;PFPeS
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) | 6.2 | 5.55 | 4 |
| PFOS (ppt) | 21 | 17.95 | 4 |
| Hazard Index | 1.903 | 1.601 | 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 Texas PFAS drinking-water standard in effect or proposed as of 2026-10-17: No state PFAS drinking-water standard; TCEQ implementing federal NPDWR (BCLP state survey, Jan 2026).
Sampling history
Sampled 2025-01-22 to 2026-03-02 · 2 entry point(s) · water types: SW · 11 sampling visits. PFAS in ppt (ng/L).
| Date | Entry point | Event | PFOA | PFOS | HI | Other detections |
|---|---|---|---|---|---|---|
| 2025-01-22 | PLANT 1 - MAIN PLANT (SW) | SE1 | 6.2 | 18.2 | 1.893 | PFBA 15.6, PFHpA 7.3, PFHxA 15, PFPeA 13.4, lithium 13.6 µg/L |
| 2025-01-22 | PLANT 2 - SECONDARY PLANT (SW) | SE1 | 6.1 | 19.3 | 1.903 | PFBA 15.2, PFHpA 7.4, PFHxA 15, PFPeA 13.3, lithium 13.6 µg/L |
| 2025-04-15 | PLANT 1 - MAIN PLANT (SW) | SE2 | n/a | n/a | n/a | lithium 13 µg/L |
| 2025-04-15 | PLANT 2 - SECONDARY PLANT (SW) | SE2 | n/a | n/a | n/a | lithium 14 µg/L |
| 2025-07-09 | PLANT 1 - MAIN PLANT (SW) | SE2 | 4.7 | 18 | 1.502 | PFBA 20, PFHpA 6.8, PFHxA 12, PFPeA 12 |
| 2025-07-15 | PLANT 2 - SECONDARY PLANT (SW) | SE2 | 5.4 | 21 | 1.704 | PFBA 15, PFHpA 6.8, PFHxA 14, PFPeA 12 |
| 2025-07-23 | PLANT 1 - MAIN PLANT (SW) | SE3 | 5.4 | 18.9 | 1.493 | PFBA 15.6, PFHpA 6.5, PFHxA 13.6, PFPeA 10, lithium 9.21 µg/L |
| 2025-07-23 | PLANT 2 - SECONDARY PLANT (SW) | SE3 | 5.1 | 17.5 | 1.393 | PFBA 8.7, PFHpA 5.7, PFHxA 12.3, PFPeA 9, lithium 9.86 µg/L |
| 2025-10-20 | PLANT 1 - MAIN PLANT (SW) | SE4 | <4 | 8.5 | 1.492 | PFBA 11.9, PFHxA 10.9, PFPeA 9.1, lithium 15.7 µg/L |
| 2025-10-20 | PLANT 2 - SECONDARY PLANT (SW) | SE4 | n/a | n/a | n/a | lithium 18.8 µg/L |
| 2026-03-02 | PLANT 2 - SECONDARY PLANT (SW) | SE4 | 5.6 | 14 | 1.403 | PFBA 14, PFHpA 5.9, PFHxA 12, PFPeA 10 |
“<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.
PLANT 1 - MAIN PLANT facility TP18684 · sample point EP001 · surface water
| Compound | MRL | 2025-01-22 SE1 | 2025-04-15 SE2 | 2025-07-09 SE2 | 2025-07-23 SE3 | 2025-10-20 SE4 |
|---|---|---|---|---|---|---|
| PFBA | 5 ppt | 15.6 | – | 20 | 15.6 | 11.9 |
| PFBS | 3 ppt | 5.9 | – | 5 | 6 | 4.8 |
| PFHpA | 3 ppt | 7.3 | – | 6.8 | 6.5 | < 3 |
| PFHxA | 3 ppt | 15 | – | 12 | 13.6 | 10.9 |
| PFHxS | 3 ppt | 18.9 | – | 15 | 14.9 | 14.9 |
| PFOA | 4 ppt | 6.2 | – | 4.7 | 5.4 | < 4 |
| PFOS | 4 ppt | 18.2 | – | 18 | 18.9 | 8.5 |
| PFPeA | 3 ppt | 13.4 | – | 12 | 10 | 9.1 |
| 11Cl-PF3OUdS | 5 ppt | < 5 | – | < 5 | < 5 | < 5 |
| 4:2 FTS | 3 ppt | < 3 | – | < 3 | < 3 | < 3 |
| 6:2 FTS | 5 ppt | < 5 | – | < 5 | < 5 | < 5 |
| 8:2 FTS | 5 ppt | < 5 | – | < 5 | < 5 | < 5 |
| 9Cl-PF3ONS | 2 ppt | < 2 | – | < 2 | < 2 | < 2 |
| ADONA | 3 ppt | < 3 | – | < 3 | < 3 | < 3 |
| HFPO-DA | 5 ppt | < 5 | – | < 5 | < 5 | < 5 |
| NEtFOSAA | 5 ppt | < 5 | < 5 | – | < 5 | < 5 |
| NFDHA | 20 ppt | < 20 | – | < 20 | < 20 | < 20 |
| NMeFOSAA | 6 ppt | < 6 | < 6 | – | < 6 | < 6 |
| PFDA | 3 ppt | < 3 | – | < 3 | < 3 | < 3 |
| PFDoA | 3 ppt | < 3 | – | < 3 | < 3 | < 3 |
| PFEESA | 3 ppt | < 3 | – | < 3 | < 3 | < 3 |
| PFHpS | 3 ppt | < 3 | – | < 3 | < 3 | < 3 |
| PFMBA | 3 ppt | < 3 | – | < 3 | < 3 | < 3 |
| PFMPA | 4 ppt | < 4 | – | < 4 | < 4 | < 4 |
| PFNA | 4 ppt | < 4 | – | < 4 | < 4 | < 4 |
| PFPeS | 4 ppt | < 4 | – | < 4 | < 4 | < 4 |
| PFTA | 8 ppt | < 8 | < 8 | – | < 8 | < 8 |
| PFTrDA | 7 ppt | < 7 | < 7 | – | < 7 | < 7 |
| PFUnA | 2 ppt | < 2 | – | < 2 | < 2 | < 2 |
| lithium | 9 µg/L | 13.6 | 13 | – | 9.21 | 15.7 |
PLANT 2 - SECONDARY PLANT facility TP21344 · sample point EP002 · surface water
| Compound | MRL | 2025-01-22 SE1 | 2025-04-15 SE2 | 2025-07-15 SE2 | 2025-07-23 SE3 | 2025-10-20 SE4 | 2026-03-02 SE4 |
|---|---|---|---|---|---|---|---|
| PFBA | 5 ppt | 15.2 | – | 15 | 8.7 | – | 14 |
| PFBS | 3 ppt | 6.1 | – | 7.1 | 5.6 | – | 5.8 |
| PFHpA | 3 ppt | 7.4 | – | 6.8 | 5.7 | – | 5.9 |
| PFHxA | 3 ppt | 15 | – | 14 | 12.3 | – | 12 |
| PFHxS | 3 ppt | 19 | – | 17 | 13.9 | – | 14 |
| PFOA | 4 ppt | 6.1 | – | 5.4 | 5.1 | – | 5.6 |
| PFOS | 4 ppt | 19.3 | – | 21 | 17.5 | – | 14 |
| PFPeA | 3 ppt | 13.3 | – | 12 | 9 | – | 10 |
| 11Cl-PF3OUdS | 5 ppt | < 5 | – | < 5 | < 5 | – | < 5 |
| 4:2 FTS | 3 ppt | < 3 | – | < 3 | < 3 | – | < 3 |
| 6:2 FTS | 5 ppt | < 5 | – | < 5 | < 5 | – | < 5 |
| 8:2 FTS | 5 ppt | < 5 | – | < 5 | < 5 | – | < 5 |
| 9Cl-PF3ONS | 2 ppt | < 2 | – | < 2 | < 2 | – | < 2 |
| ADONA | 3 ppt | < 3 | – | < 3 | < 3 | – | < 3 |
| HFPO-DA | 5 ppt | < 5 | – | < 5 | < 5 | – | < 5 |
| NEtFOSAA | 5 ppt | < 5 | < 5 | – | < 5 | < 5 | – |
| NFDHA | 20 ppt | < 20 | – | < 20 | < 20 | – | < 20 |
| NMeFOSAA | 6 ppt | < 6 | < 6 | – | < 6 | < 6 | – |
| PFDA | 3 ppt | < 3 | – | < 3 | < 3 | – | < 3 |
| PFDoA | 3 ppt | < 3 | – | < 3 | < 3 | – | < 3 |
| PFEESA | 3 ppt | < 3 | – | < 3 | < 3 | – | < 3 |
| PFHpS | 3 ppt | < 3 | – | < 3 | < 3 | – | < 3 |
| PFMBA | 3 ppt | < 3 | – | < 3 | < 3 | – | < 3 |
| PFMPA | 4 ppt | < 4 | – | < 4 | < 4 | – | < 4 |
| PFNA | 4 ppt | < 4 | – | < 4 | < 4 | – | < 4 |
| PFPeS | 4 ppt | < 4 | – | < 4 | < 4 | – | < 4 |
| PFTA | 8 ppt | < 8 | < 8 | – | < 8 | < 8 | – |
| PFTrDA | 7 ppt | < 7 | < 7 | – | < 7 | < 7 | – |
| PFUnA | 2 ppt | < 2 | – | < 2 | < 2 | – | < 2 |
| lithium | 9 µg/L | 13.6 | 14 | – | 9.86 | 18.8 | – |
Statistics by compound
| Compound | Results | Detected | Highest (date) | Mean bounds | KM median | P75 | P90 | P95 |
|---|---|---|---|---|---|---|---|---|
| PFBA | 8 | 100% | 20 2025-07-09 | 14.5–14.5 | 15 | 15.6 | 20 | 20 |
| PFBS | 8 | 100% | 7.1 2025-07-15 | 5.79–5.79 | 5.8 | 6 | 7.1 | 7.1 |
| PFHxA | 8 | 100% | 15 2025-01-22 | 13.1–13.1 | 12.3 | 14 | 15 | 15 |
| PFHxS | 8 | 100% | 19 2025-01-22 | 15.95–15.95 | 14.9 | 17 | 19 | 19 |
| PFOS | 8 | 100% | 21 2025-07-15 | 16.93–16.93 | 18 | 18.9 | 21 | 21 |
| PFPeA | 8 | 100% | 13.4 2025-01-22 | 11.1–11.1 | 10 | 12 | 13.4 | 13.4 |
| lithium | 8 | 100% | 18.8 2025-10-20 | 13.47–13.47 | 13.6 | 14 | 18.8 | 18.8 |
| PFHpA | 8 | 88% | 7.4 2025-01-22 | 5.8–6.17 | 6.5 | 6.8 | 7.4 | 7.4 |
| PFOA | 8 | 88% | 6.2 2025-01-22 | 4.81–5.31 | 5.4 | 5.6 | 6.2 | 6.2 |
Never detected (21): 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.
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 2026-06-16; 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 a6f3d99247ed · 2026-10-18T04:13Z · UCMR 5 release Jul2026 · SDWIS 2026Q3. Data and methods.