- PWSID
- TX2200060
- State
- Texas
- System type
- community water system (CWS)
- Population served
- 4,720
- City
- Lake Worth
- Counties
- Tarrant County
- Primary source water
- surface water (purchased)
- UCMR 5 sampling
- 2023-02-06 to 2023-11-20 · 4 entry point(s) · water types: GW;SW
- Service-area boundary
- authoritative
Hazard Index 1–3 × its limit highest single result
Hazard Index 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
- City Of Fort Worth (TX2200012)
Seller's highest results: PFOA 8.3 ppt · PFOS 7.3 ppt · HI 2.583 · detected: PFBA;PFBS;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) | <MRL | 0 | 4 |
| PFOS (ppt) | 4.5 | 1.12 | 4 |
| Hazard Index | 1.372 | 0.789 | 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 2023-02-06 to 2023-11-20 · 4 entry point(s) · water types: GW;SW · 12 sampling visits. PFAS in ppt (ng/L).
| Date | Entry point | Event | PFOA | PFOS | HI | Other detections |
|---|---|---|---|---|---|---|
| 2023-02-06 | CITY OF LAKE WORTH 001 (SW) | SE1 | <4 | <4 | 1.102 | PFBA 6.6, PFHxA 4.8, PFPeA 3.6 |
| 2023-02-06 | CITY OF LAKE WORTH 003 (GW) | SE1 | <4 | <4 | 0 | lithium 28.5 µg/L |
| 2023-02-06 | CITY OF LAKE WORTH 005 (GW) | SE1 | <4 | <4 | 0 | lithium 24.9 µg/L |
| 2023-02-06 | Connection to Ft. Worth (SW) | SE1 | <4 | <4 | 0 | PFBA 6.3 |
| 2023-05-16 | CITY OF LAKE WORTH 001 (SW) | SE2 | <4 | 4.5 | 1.372 | PFBA 6, PFHxA 5.6, PFPeA 3.5 |
| 2023-05-16 | Connection to Ft. Worth (SW) | SE2 | <4 | <4 | 1.182 | PFHxA 4.9, PFPeA 3.3 |
| 2023-08-21 | CITY OF LAKE WORTH 001 (SW) | SE3 | <4 | <4 | 0.682 | PFHxA 4.4, PFPeA 4.5 |
| 2023-08-21 | CITY OF LAKE WORTH 003 (GW) | SE2 | <4 | <4 | 0 | lithium 26 µg/L |
| 2023-08-21 | CITY OF LAKE WORTH 005 (GW) | SE2 | <4 | <4 | 0 | lithium 29.4 µg/L |
| 2023-08-21 | Connection to Ft. Worth (SW) | SE3 | <4 | <4 | 0.652 | PFBA 6, PFHxA 4.2, PFPeA 4.1 |
| 2023-11-20 | CITY OF LAKE WORTH 001 (SW) | SE4 | <4 | <4 | 0 | 6:2 FTS 7.7 |
| 2023-11-20 | Connection to Ft. Worth (SW) | SE4 | <4 | <4 | 0.49 | 6:2 FTS 8.3, PFHxA 3.6 |
“<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.
CITY OF LAKE WORTH 001 facility 10001 · sample point TRTTAP001 · surface water
| Compound | MRL | 2023-02-06 SE1 | 2023-05-16 SE2 | 2023-08-21 SE3 | 2023-11-20 SE4 |
|---|---|---|---|---|---|
| 6:2 FTS | 5 ppt | < 5 | < 5 | < 5 | 7.7 |
| PFBA | 5 ppt | 6.6 | 6 | < 5 | < 5 |
| PFBS | 3 ppt | 3.1 | 3.3 | 3.8 | < 3 |
| PFHxA | 3 ppt | 4.8 | 5.6 | 4.4 | < 3 |
| PFHxS | 3 ppt | 11 | 13.7 | 6.8 | < 3 |
| PFOS | 4 ppt | < 4 | 4.5 | < 4 | < 4 |
| PFPeA | 3 ppt | 3.6 | 3.5 | 4.5 | < 3 |
| 11Cl-PF3OUdS | 5 ppt | < 5 | < 5 | < 5 | < 5 |
| 4:2 FTS | 3 ppt | < 3 | < 3 | < 3 | < 3 |
| 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 |
| 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 | < 9 |
CITY OF LAKE WORTH 003 facility 10003 · sample point TRTTAP003 · groundwater
| Compound | MRL | 2023-02-06 SE1 | 2023-08-21 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 | 28.5 | 26 |
CITY OF LAKE WORTH 005 facility 10005 · sample point TRTTAP005 · groundwater
| Compound | MRL | 2023-02-06 SE1 | 2023-08-21 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 | 24.9 | 29.4 |
Connection to Ft. Worth facility 10004 · sample point EP4 · surface water
| Compound | MRL | 2023-02-06 SE1 | 2023-05-16 SE2 | 2023-08-21 SE3 | 2023-11-20 SE4 |
|---|---|---|---|---|---|
| 6:2 FTS | 5 ppt | < 5 | < 5 | < 5 | 8.3 |
| PFBA | 5 ppt | 6.3 | < 5 | 6 | < 5 |
| PFBS | 3 ppt | < 3 | 3.2 | 3.8 | < 3 |
| PFHxA | 3 ppt | < 3 | 4.9 | 4.2 | 3.6 |
| PFHxS | 3 ppt | < 3 | 11.8 | 6.5 | 4.9 |
| PFPeA | 3 ppt | < 3 | 3.3 | 4.1 | < 3 |
| 11Cl-PF3OUdS | 5 ppt | < 5 | < 5 | < 5 | < 5 |
| 4:2 FTS | 3 ppt | < 3 | < 3 | < 3 | < 3 |
| 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 |
| 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 |
| 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 | < 9 |
Statistics by compound
| Compound | Results | Detected | Highest (date) | Mean bounds | KM median | P75 | P90 | P95 |
|---|---|---|---|---|---|---|---|---|
| PFHxA | 12 | 50% | 5.6 2023-05-16 | 2.29–3.79 | <MRL | 4.4 | 4.9 | 5.6 |
| PFHxS | 12 | 50% | 13.7 2023-05-16 | 4.56–6.06 | <MRL | 6.8 | 11.8 | 13.7 |
| PFBS | 12 | 42% | 3.8 2023-08-21 | 1.43–3.18 | <MRL | 3.2 | 3.8 | 3.8 |
| PFPeA | 12 | 42% | 4.5 2023-08-21 | 1.58–3.33 | <MRL | 3.5 | 4.1 | 4.5 |
| PFBA | 12 | 33% | 6.6 2023-02-06 | 2.08–5.41 | <MRL | 6 | 6.3 | 6.6 |
| lithium | 12 | 33% | 29.4 2023-08-21 | 9.07–15.07 | <MRL | 24.9 | 28.5 | 29.4 |
| 6:2 FTS | 12 | 17% | 8.3 2023-11-20 | 1.33–5.5 | <MRL | <MRL | 7.7 | 8.3 |
| PFOS | 12 | 8% | 4.5 2023-05-16 | 0.38–4.04 | <MRL | <MRL | <MRL | 4.5 |
Never detected (22): 11Cl-PF3OUdS, 4:2 FTS, 8:2 FTS, 9Cl-PF3ONS, ADONA, HFPO-DA, NEtFOSAA, NFDHA, NMeFOSAA, PFDA, PFDoA, PFEESA, PFHpA, PFHpS, PFMBA, PFMPA, PFNA, PFOA, 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.