- PWSID
- TX1010056
- State
- Texas
- System type
- community water system (CWS)
- Population served
- 89,702
- City
- Houston
- Counties
- Harris County
- Primary source water
- surface water (purchased)
- UCMR 5 sampling
- 2023-04-20 to 2024-03-25 · 5 entry point(s) · water types: GW;MX;SW
- Service-area boundary
- authoritative
PFOS 1–3 × its limit highest single result
PFOS 1–3 × 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
- Lyndon B Johnson Space Center (TX1010250)
Seller's highest results: PFOA <MRL · PFOS <MRL · HI 0 · detected: PFBA;PFHxA;PFPeA - City Of Nassau Bay (TX1010152)
Seller's highest results: PFOA <MRL · PFOS <MRL · HI 0 · detected: 6:2 FTS;PFBA;PFHxA;PFPeA - City Of Houston (TX1010013)
Seller's highest results: PFOA <MRL · PFOS <MRL · HI 0 · detected: 6:2 FTS;PFBA;PFHxA;PFPeA - City Of Pasadena (TX1010293)
Seller's highest results: PFOA <MRL · PFOS 4.9 ppt · HI 0.432 · detected: PFBA;PFBS;PFHpA;PFHxA;PFHxS;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 | 1 | 4 |
| PFOS (ppt) | 6.7 | 5.72 | 4 |
| Hazard Index | 0.603 | 0.45 | 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 2023-04-20 to 2024-03-25 · 5 entry point(s) · water types: GW;MX;SW · 22 sampling visits. PFAS in ppt (ng/L).
| Date | Entry point | Event | PFOA | PFOS | HI | Other detections |
|---|---|---|---|---|---|---|
| 2023-04-20 | 1735 Kirby Road (SW) | SE1 | <4 | 6.5 | 0.512 | PFBA 8.4, PFHpA 3.3, PFHxA 9.1, PFPeA 8.1 |
| 2023-04-20 | Bay Area Blvd. (GW) | SE1 | <4 | <4 | 0 | lithium 12.9 µg/L |
| 2023-04-20 | El Camino (MX) | SE1 | <4 | 6.4 | 0.502 | PFBA 8.1, PFHpA 3, PFHxA 8.3, PFPeA 7.8 |
| 2023-04-20 | Genoa Red Bluff Plant (SW) | SE1 | <4 | 6.2 | 0.542 | PFBA 7.8, PFHpA 3.1, PFHxA 8.3, PFPeA 7.8 |
| 2023-04-20 | Manor Field (MX) | SE1 | <4 | 6 | 0.532 | PFBA 7.9, PFHpA 3.6, PFHxA 8.7, PFPeA 7.8 |
| 2023-07-19 | 1735 Kirby Road (SW) | SE2 | <4 | 4.6 | 0.302 | PFBA 10, PFHxA 5.9, PFPeA 6.9 |
| 2023-07-19 | El Camino (MX) | SE2 | <4 | <4 | 0 | PFBA 5, PFHxA 3.6, PFPeA 3.4, lithium 10.7 µg/L |
| 2023-07-19 | Genoa Red Bluff Plant (SW) | SE2 | <4 | 5.4 | 0.312 | PFBA 9.7, PFHxA 6.1, PFPeA 7.3 |
| 2023-07-19 | Manor Field (MX) | SE2 | <4 | <4 | 0 | PFBA 6.2, PFHxA 3.5, PFPeA 3.4, lithium 12.1 µg/L |
| 2023-08-30 | 1735 Kirby Road (SW) | SE1 | n/a | n/a | n/a | none |
| 2023-08-30 | El Camino (MX) | SE1 | n/a | n/a | n/a | none |
| 2023-08-30 | Genoa Red Bluff Plant (SW) | SE1 | n/a | n/a | n/a | none |
| 2023-10-23 | Bay Area Blvd. (GW) | SE2 | <4 | <4 | 0 | lithium 11.9 µg/L |
| 2023-10-23 | El Camino (MX) | SE3 | <4 | 5.7 | 0.543 | PFBA 11.1, PFHpA 3, PFHxA 7.3, PFPeA 6.7 |
| 2023-10-23 | Genoa Red Bluff Plant (SW) | SE3 | 4 | 6.7 | 0.603 | PFBA 14.5, PFHpA 3.7, PFHxA 9.5, PFPeA 7.5 |
| 2023-10-23 | Manor Field (MX) | SE3 | <4 | 6.2 | 0.583 | PFBA 13.1, PFHpA 3.4, PFHxA 8.8, PFPeA 7.1 |
| 2023-12-27 | 1735 Kirby Road (SW) | SE3 | <4 | 4.1 | 0.322 | PFBA 8.2, PFHxA 6.7, PFPeA 7.3, lithium 9.2 µg/L |
| 2024-01-30 | 1735 Kirby Road (SW) | SE4 | n/a | n/a | n/a | none |
| 2024-01-30 | El Camino (MX) | SE4 | <4 | <4 | 0 | lithium 11 µg/L |
| 2024-01-30 | Genoa Red Bluff Plant (SW) | SE4 | <4 | 4.6 | 0.342 | PFBA 10, PFHxA 7.8, PFPeA 8.3 |
| 2024-01-30 | Manor Field (MX) | SE4 | <4 | 5.8 | 0.402 | PFBA 8.9, PFHxA 7.7, PFPeA 8.8 |
| 2024-03-25 | 1735 Kirby Road (SW) | SE4 | <4 | <4 | 0 | PFHxA 3.6, PFPeA 3.9 |
“<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
540 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.
1735 Kirby Road facility 60347 · sample point EP008MC · surface water
| Compound | MRL | 2023-04-20 SE1 | 2023-07-19 SE2 | 2023-08-30 SE1 | 2023-12-27 SE3 | 2024-01-30 SE4 | 2024-03-25 SE4 |
|---|---|---|---|---|---|---|---|
| PFBA | 5 ppt | 8.4 | 10 | – | 8.2 | – | < 5 |
| PFBS | 3 ppt | 3.5 | 3.2 | – | 3.4 | – | < 3 |
| PFHpA | 3 ppt | 3.3 | < 3 | – | < 3 | – | < 3 |
| PFHxA | 3 ppt | 9.1 | 5.9 | – | 6.7 | – | 3.6 |
| PFHxS | 3 ppt | 5.1 | 3 | – | 3.2 | – | < 3 |
| PFOS | 4 ppt | 6.5 | 4.6 | – | 4.1 | – | < 4 |
| PFPeA | 3 ppt | 8.1 | 6.9 | – | 7.3 | – | 3.9 |
| 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 |
| 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 |
| PFOA | 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 | – | 9.2 | < 9 | – |
Bay Area Blvd. facility 51779 · sample point EP007MC · groundwater
| Compound | MRL | 2023-04-20 SE1 | 2023-10-23 SE2 |
|---|---|---|---|
| 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 |
| NFDHA | 20 ppt | < 20 | < 20 |
| NMeFOSAA | 6 ppt | < 6 | < 6 |
| PFBA | 5 ppt | < 5 | < 5 |
| PFBS | 3 ppt | < 3 | < 3 |
| PFDA | 3 ppt | < 3 | < 3 |
| PFDoA | 3 ppt | < 3 | < 3 |
| PFEESA | 3 ppt | < 3 | < 3 |
| PFHpA | 3 ppt | < 3 | < 3 |
| PFHpS | 3 ppt | < 3 | < 3 |
| PFHxA | 3 ppt | < 3 | < 3 |
| PFHxS | 3 ppt | < 3 | < 3 |
| PFMBA | 3 ppt | < 3 | < 3 |
| PFMPA | 4 ppt | < 4 | < 4 |
| PFNA | 4 ppt | < 4 | < 4 |
| PFOA | 4 ppt | < 4 | < 4 |
| PFOS | 4 ppt | < 4 | < 4 |
| PFPeA | 3 ppt | < 3 | < 3 |
| PFPeS | 4 ppt | < 4 | < 4 |
| PFTA | 8 ppt | < 8 | < 8 |
| PFTrDA | 7 ppt | < 7 | < 7 |
| PFUnA | 2 ppt | < 2 | < 2 |
| lithium | 9 µg/L | 12.9 | 11.9 |
El Camino facility 51780 · sample point EP004MC · MX
| Compound | MRL | 2023-04-20 SE1 | 2023-07-19 SE2 | 2023-08-30 SE1 | 2023-10-23 SE3 | 2024-01-30 SE4 |
|---|---|---|---|---|---|---|
| PFBA | 5 ppt | 8.1 | 5 | – | 11.1 | < 5 |
| PFBS | 3 ppt | 4.1 | < 3 | – | 5.1 | < 3 |
| PFHpA | 3 ppt | 3 | < 3 | – | 3 | < 3 |
| PFHxA | 3 ppt | 8.3 | 3.6 | – | 7.3 | < 3 |
| PFHxS | 3 ppt | 5 | < 3 | – | 5.4 | < 3 |
| PFOS | 4 ppt | 6.4 | < 4 | – | 5.7 | < 4 |
| PFPeA | 3 ppt | 7.8 | 3.4 | – | 6.7 | < 3 |
| 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 |
| PFOA | 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 | 10.7 | – | < 9 | 11 |
Genoa Red Bluff Plant facility 51775 · sample point EP002MC · surface water
| Compound | MRL | 2023-04-20 SE1 | 2023-07-19 SE2 | 2023-08-30 SE1 | 2023-10-23 SE3 | 2024-01-30 SE4 |
|---|---|---|---|---|---|---|
| PFBA | 5 ppt | 7.8 | 9.7 | – | 14.5 | 10 |
| PFBS | 3 ppt | 3.5 | 3.5 | – | 5.7 | 3.9 |
| PFHpA | 3 ppt | 3.1 | < 3 | – | 3.7 | < 3 |
| PFHxA | 3 ppt | 8.3 | 6.1 | – | 9.5 | 7.8 |
| PFHxS | 3 ppt | 5.4 | 3.1 | – | 6 | 3.4 |
| PFOA | 4 ppt | < 4 | < 4 | – | 4 | < 4 |
| PFOS | 4 ppt | 6.2 | 5.4 | – | 6.7 | 4.6 |
| PFPeA | 3 ppt | 7.8 | 7.3 | – | 7.5 | 8.3 |
| 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 | < 9 |
Manor Field facility 51776 · sample point EP003MC · MX
| Compound | MRL | 2023-04-20 SE1 | 2023-07-19 SE2 | 2023-10-23 SE3 | 2024-01-30 SE4 |
|---|---|---|---|---|---|
| PFBA | 5 ppt | 7.9 | 6.2 | 13.1 | 8.9 |
| PFBS | 3 ppt | 3.5 | < 3 | 5.5 | 3.3 |
| PFHpA | 3 ppt | 3.6 | < 3 | 3.4 | < 3 |
| PFHxA | 3 ppt | 8.7 | 3.5 | 8.8 | 7.7 |
| PFHxS | 3 ppt | 5.3 | < 3 | 5.8 | 4 |
| PFOS | 4 ppt | 6 | < 4 | 6.2 | 5.8 |
| PFPeA | 3 ppt | 7.8 | 3.4 | 7.1 | 8.8 |
| 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 |
| PFOA | 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 | 12.1 | < 9 | < 9 |
Statistics by compound
| Compound | Results | Detected | Highest (date) | Mean bounds | KM median | P75 | P90 | P95 |
|---|---|---|---|---|---|---|---|---|
| PFHxA | 18 | 83% | 9.5 2023-10-23 | 5.83–6.33 | 6.7 | 8.3 | 9.1 | 9.5 |
| PFPeA | 18 | 83% | 8.8 2024-01-30 | 5.67–6.17 | 7.1 | 7.8 | 8.3 | 8.8 |
| PFBA | 18 | 78% | 14.5 2023-10-23 | 7.16–8.27 | 8.1 | 10 | 13.1 | 14.5 |
| PFBS | 18 | 67% | 5.7 2023-10-23 | 2.68–3.68 | 3.4 | 3.9 | 5.5 | 5.7 |
| PFHxS | 18 | 67% | 6 2023-10-23 | 3.04–4.04 | 3.2 | 5.3 | 5.8 | 6 |
| PFOS | 18 | 67% | 6.7 2023-10-23 | 3.79–5.12 | 4.6 | 6.2 | 6.5 | 6.7 |
| PFHpA | 18 | 39% | 3.7 2023-10-23 | 1.28–3.12 | <MRL | 3.1 | 3.6 | 3.7 |
| lithium | 18 | 33% | 12.9 2023-04-20 | 3.77–9.77 | <MRL | 10.7 | 12.1 | 12.9 |
| PFOA | 18 | 6% | 4 2023-10-23 | 0.22–4 | <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.