- PWSID
- TX0570050
- State
- Texas
- System type
- community water system (CWS)
- Population served
- 264,546
- City
- Irving
- Counties
- Dallas County
- Primary source water
- surface water (purchased)
- UCMR 5 sampling
- 2023-07-11 to 2024-04-08 · 3 entry point(s) · water types: SW
- Service-area boundary
- authoritative
PFOA 1–3 × its limit highest single result
PFOA below 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
- Dallas Water Utility (TX0570004)
Seller's highest results: PFOA 6.3 ppt · PFOS 5.1 ppt · HI 0.384 · 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) | 4.9 | 2.25 | 4 |
| PFOS (ppt) | 4 | 1 | 4 |
| Hazard Index | 0.303 | 0.077 | 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 2023-07-11 to 2024-04-08 · 3 entry point(s) · water types: SW · 12 sampling visits. PFAS in ppt (ng/L).
| Date | Entry point | Event | PFOA | PFOS | HI | Other detections |
|---|---|---|---|---|---|---|
| 2023-07-11 | Hackberry Pump Station (SW) | SE1 | <4 | <4 | 0.002 | PFBA 8.8, PFHxA 7.1, PFPeA 6.9 |
| 2023-07-11 | Mac Arthur Pump Station (SW) | SE1 | 4.1 | <4 | 0.003 | PFBA 8.5, PFHpA 3.2, PFHxA 11.9, PFPeA 11.7 |
| 2023-07-11 | Northgate Pump Station (SW) | SE1 | <4 | <4 | 0.003 | PFBA 7.9, PFHxA 7.4, PFPeA 7.2 |
| 2023-10-18 | Hackberry Pump Station (SW) | SE2 | <4 | <4 | 0.002 | PFBA 9.6, PFHxA 6.8, PFPeA 6.9 |
| 2023-10-18 | Mac Arthur Pump Station (SW) | SE2 | <4 | <4 | 0.002 | PFBA 10, PFHxA 6.8, PFPeA 6.9 |
| 2023-10-18 | Northgate Pump Station (SW) | SE2 | <4 | <4 | 0.002 | PFBA 10, PFHxA 7.4, PFPeA 7.4 |
| 2024-01-29 | Hackberry Pump Station (SW) | SE3 | 4 | <4 | 0.003 | PFBA 11.1, PFHxA 7.9, PFPeA 7.6, lithium 9.99 µg/L |
| 2024-01-29 | Mac Arthur Pump Station (SW) | SE3 | 4.9 | 4 | 0.303 | PFBA 11.8, PFHpA 3.2, PFHxA 10.2, PFPeA 9.9, lithium 9.67 µg/L |
| 2024-01-29 | Northgate Pump Station (SW) | SE3 | 4 | <4 | 0.002 | PFBA 11.3, PFHxA 8, PFPeA 7.9, lithium 9.05 µg/L |
| 2024-04-08 | Hackberry Pump Station (SW) | SE4 | <4 | <4 | 0.002 | PFBA 8.9, PFHxA 6.9, PFPeA 6.7, lithium 9.72 µg/L |
| 2024-04-08 | Mac Arthur Pump Station (SW) | SE4 | <4 | <4 | 0.002 | PFBA 9.8, PFHxA 7.1, PFPeA 7.2, lithium 9.07 µg/L |
| 2024-04-08 | Northgate Pump Station (SW) | SE4 | <4 | <4 | 0.002 | PFBA 9.4, PFHxA 8.1, PFPeA 7.9 |
“<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
360 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.
Hackberry Pump Station facility 34644 · sample point EP005 · surface water
| Compound | MRL | 2023-07-11 SE1 | 2023-10-18 SE2 | 2024-01-29 SE3 | 2024-04-08 SE4 |
|---|---|---|---|---|---|
| PFBA | 5 ppt | 8.8 | 9.6 | 11.1 | 8.9 |
| PFBS | 3 ppt | 4.5 | 3.8 | 5 | 4.4 |
| PFHxA | 3 ppt | 7.1 | 6.8 | 7.9 | 6.9 |
| PFOA | 4 ppt | < 4 | < 4 | 4 | < 4 |
| PFPeA | 3 ppt | 6.9 | 6.9 | 7.6 | 6.7 |
| 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 |
| PFHpA | 3 ppt | < 3 | < 3 | < 3 | < 3 |
| PFHpS | 3 ppt | < 3 | < 3 | < 3 | < 3 |
| PFHxS | 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 |
| PFOS | 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 | < 9 | < 9 | 9.99 | 9.72 |
Mac Arthur Pump Station facility 34643 · sample point EP001 · surface water
| Compound | MRL | 2023-07-11 SE1 | 2023-10-18 SE2 | 2024-01-29 SE3 | 2024-04-08 SE4 |
|---|---|---|---|---|---|
| PFBA | 5 ppt | 8.5 | 10 | 11.8 | 9.8 |
| PFBS | 3 ppt | 5.3 | 4 | 5.5 | 4.5 |
| PFHpA | 3 ppt | 3.2 | < 3 | 3.2 | < 3 |
| PFHxA | 3 ppt | 11.9 | 6.8 | 10.2 | 7.1 |
| PFHxS | 3 ppt | < 3 | < 3 | 3 | < 3 |
| PFOA | 4 ppt | 4.1 | < 4 | 4.9 | < 4 |
| PFOS | 4 ppt | < 4 | < 4 | 4 | < 4 |
| PFPeA | 3 ppt | 11.7 | 6.9 | 9.9 | 7.2 |
| 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 | < 9 | < 9 | 9.67 | 9.07 |
Northgate Pump Station facility 34645 · sample point EP006 · surface water
| Compound | MRL | 2023-07-11 SE1 | 2023-10-18 SE2 | 2024-01-29 SE3 | 2024-04-08 SE4 |
|---|---|---|---|---|---|
| PFBA | 5 ppt | 7.9 | 10 | 11.3 | 9.4 |
| PFBS | 3 ppt | 5.6 | 4.2 | 4.7 | 4.7 |
| PFHxA | 3 ppt | 7.4 | 7.4 | 8 | 8.1 |
| PFOA | 4 ppt | < 4 | < 4 | 4 | < 4 |
| PFPeA | 3 ppt | 7.2 | 7.4 | 7.9 | 7.9 |
| 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 |
| PFHpA | 3 ppt | < 3 | < 3 | < 3 | < 3 |
| PFHpS | 3 ppt | < 3 | < 3 | < 3 | < 3 |
| PFHxS | 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 |
| PFOS | 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 | < 9 | < 9 | 9.05 | < 9 |
Statistics by compound
| Compound | Results | Detected | Highest (date) | Mean bounds | KM median | P75 | P90 | P95 |
|---|---|---|---|---|---|---|---|---|
| PFBA | 12 | 100% | 11.8 2024-01-29 | 9.76–9.76 | 9.6 | 10 | 11.3 | 11.8 |
| PFBS | 12 | 100% | 5.6 2023-07-11 | 4.68–4.68 | 4.5 | 5 | 5.5 | 5.6 |
| PFHxA | 12 | 100% | 11.9 2023-07-11 | 7.97–7.97 | 7.4 | 8 | 10.2 | 11.9 |
| PFPeA | 12 | 100% | 11.7 2023-07-11 | 7.85–7.85 | 7.2 | 7.9 | 9.9 | 11.7 |
| lithium | 12 | 42% | 9.99 2024-01-29 | 3.96–9.21 | <MRL | 9.07 | 9.72 | 9.99 |
| PFOA | 12 | 33% | 4.9 2024-01-29 | 1.42–4.08 | <MRL | 4 | 4.1 | 4.9 |
| PFHpA | 12 | 17% | 3.2 2023-07-11 | 0.53–3.03 | <MRL | <MRL | 3.2 | 3.2 |
| PFHxS | 12 | 8% | 3 2024-01-29 | 0.25–3 | <MRL | <MRL | <MRL | 3 |
| PFOS | 12 | 8% | 4 2024-01-29 | 0.33–4 | <MRL | <MRL | <MRL | 4 |
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.