Exxon Mobil Baytown Refinery
Published drinking-water records and contacts for Exxon Mobil Baytown Refinery. System TX1011562. Review sources and dates; not a real-time water assessment.
- System ID
- TX1011562
- State or territory
- TX
- Published population served
- 7000
- System type (source code)
- NTNCWS
Published records and dates
- PFAS / lithium (EPA UCMR 5): 480 — 2024-03-11 – 2025-04-08
- Lead and copper monitoring summaries: 10 — 2012-07-01 – 2024-12-31
Missing records here do not mean the provider did not test. Published records are not a real-time assessment of your tap water.
Published testing results
Selected recent records are shown below. Different sampling locations and dates are not interchangeable. These excerpts are not a complete testing history.
“<” means below the stated reporting limit, not zero. A reported measurement alone is not a safety verdict. Read an example
| Substance | Published result | Reporting limit | Sample date | Sampling location |
|---|---|---|---|---|
| 11Cl-PF3OUdS | < 0.005 µg/L | 0.005 µg/L | 2025-04-08 | EXXON MOBIL BAYTOWN REFINERY / TRTTAP |
| 4:2 FTS | < 0.003 µg/L | 0.003 µg/L | 2025-04-08 | EXXON MOBIL BAYTOWN REFINERY / TRTTAP |
| 6:2 FTS | < 0.005 µg/L | 0.005 µg/L | 2025-04-08 | EXXON MOBIL BAYTOWN REFINERY / TRTTAP |
| 8:2 FTS | < 0.005 µg/L | 0.005 µg/L | 2025-04-08 | EXXON MOBIL BAYTOWN REFINERY / TRTTAP |
| 9Cl-PF3ONS | < 0.002 µg/L | 0.002 µg/L | 2025-04-08 | EXXON MOBIL BAYTOWN REFINERY / TRTTAP |
| ADONA | < 0.003 µg/L | 0.003 µg/L | 2025-04-08 | EXXON MOBIL BAYTOWN REFINERY / TRTTAP |
| HFPO-DA | < 0.005 µg/L | 0.005 µg/L | 2025-04-08 | EXXON MOBIL BAYTOWN REFINERY / TRTTAP |
| NEtFOSAA | < 0.005 µg/L | 0.005 µg/L | 2025-02-11 | EXXON MOBIL BAYTOWN REFINERY / TRTTAP |
| NFDHA | < 0.02 µg/L | 0.02 µg/L | 2025-04-08 | EXXON MOBIL BAYTOWN REFINERY / TRTTAP |
| NMeFOSAA | < 0.006 µg/L | 0.006 µg/L | 2025-02-11 | EXXON MOBIL BAYTOWN REFINERY / TRTTAP |
| PFBA | 0.0083 µg/L | 0.005 µg/L | 2025-04-08 | EXXON MOBIL BAYTOWN REFINERY / TRTTAP |
| PFBS | < 0.003 µg/L | 0.003 µg/L | 2025-04-08 | EXXON MOBIL BAYTOWN REFINERY / TRTTAP |
| PFDA | < 0.003 µg/L | 0.003 µg/L | 2025-04-08 | EXXON MOBIL BAYTOWN REFINERY / TRTTAP |
| PFDoA | < 0.003 µg/L | 0.003 µg/L | 2025-04-08 | EXXON MOBIL BAYTOWN REFINERY / TRTTAP |
| PFEESA | < 0.003 µg/L | 0.003 µg/L | 2025-04-08 | EXXON MOBIL BAYTOWN REFINERY / TRTTAP |
| PFHpA | < 0.003 µg/L | 0.003 µg/L | 2025-04-08 | EXXON MOBIL BAYTOWN REFINERY / TRTTAP |
| PFHpS | < 0.003 µg/L | 0.003 µg/L | 2025-04-08 | EXXON MOBIL BAYTOWN REFINERY / TRTTAP |
| PFHxA | 0.0041 µg/L | 0.003 µg/L | 2025-04-08 | EXXON MOBIL BAYTOWN REFINERY / TRTTAP |
| PFHxS | < 0.003 µg/L | 0.003 µg/L | 2025-04-08 | EXXON MOBIL BAYTOWN REFINERY / TRTTAP |
| PFMBA | < 0.003 µg/L | 0.003 µg/L | 2025-04-08 | EXXON MOBIL BAYTOWN REFINERY / TRTTAP |
| PFMPA | < 0.004 µg/L | 0.004 µg/L | 2025-04-08 | EXXON MOBIL BAYTOWN REFINERY / TRTTAP |
| PFNA | < 0.004 µg/L | 0.004 µg/L | 2025-04-08 | EXXON MOBIL BAYTOWN REFINERY / TRTTAP |
| PFOA | < 0.004 µg/L | 0.004 µg/L | 2025-04-08 | EXXON MOBIL BAYTOWN REFINERY / TRTTAP |
| PFOS | < 0.004 µg/L | 0.004 µg/L | 2025-04-08 | EXXON MOBIL BAYTOWN REFINERY / TRTTAP |
| PFPeA | 0.0046 µg/L | 0.003 µg/L | 2025-04-08 | EXXON MOBIL BAYTOWN REFINERY / TRTTAP |
| PFPeS | < 0.004 µg/L | 0.004 µg/L | 2025-04-08 | EXXON MOBIL BAYTOWN REFINERY / TRTTAP |
| PFTA | < 0.008 µg/L | 0.008 µg/L | 2025-02-11 | EXXON MOBIL BAYTOWN REFINERY / TRTTAP |
| PFTrDA | < 0.007 µg/L | 0.007 µg/L | 2025-02-11 | EXXON MOBIL BAYTOWN REFINERY / TRTTAP |
| PFUnA | < 0.002 µg/L | 0.002 µg/L | 2025-04-08 | EXXON MOBIL BAYTOWN REFINERY / TRTTAP |
| lithium | < 9 µg/L | 9 µg/L | 2024-12-11 | EXXON MOBIL BAYTOWN REFINERY / TRTTAP |
Download all EPA UCMR 5 records (CSV)
Lead and copper: 90th-percentile summaries
These describe a monitoring period across sampled locations, not the result at your home. How to read the 90th percentile
| Substance | Published 90th percentile | Monitoring period | Source quarter |
|---|---|---|---|
| Lead (PB90) | 0.0029 mg/L | 2022-01-01 – 2024-12-31 | 2026Q3 |
| Lead (PB90) | 0.0027 mg/L | 2019-01-01 – 2021-12-31 | 2026Q3 |
| Lead (PB90) | 0.0034 mg/L | 2018-01-01 – 2018-12-31 | 2026Q3 |
| Lead (PB90) | 0.0061 mg/L | 2017-01-01 – 2017-12-31 | 2026Q3 |
| Lead (PB90) | 0.0076 mg/L | 2016-01-01 – 2016-12-31 | 2026Q3 |
| Lead (PB90) | 0.0072 mg/L | 2015-01-01 – 2015-12-31 | 2026Q3 |
| Lead (PB90) | 0.0075 mg/L | 2014-01-01 – 2014-12-31 | 2026Q3 |
| Lead (PB90) | 0.00688 mg/L | 2013-07-01 – 2013-12-31 | 2026Q3 |
Published compliance history
2 imported records. Status is as recorded in the source; historical records are not current advisories. Missing records do not establish that no violations occurred.
| Rule / record | Period | Recorded status | Health-based (EPA classification) | Source quarter |
|---|---|---|---|---|
| Lead and Copper Rule Revisions / Notification, Known or Potential LSL | 2025-07-02 – — | Resolved | No | 2026Q3 |
| Revised Total Coliform Rule / Monitoring, Routine (RTCR) | 2021-02-01 – 2021-02-28 | Resolved | No | 2026Q3 |
Source dates and refresh checks
A refresh check is not a sample date. Publication periods, sample dates and checks are shown separately.
- EPA SDWIS lead/copper summaries and service areas — source period: — – —; last checked: 2026-10-17
- EPA SDWIS contacts and compliance records — source period: — – —; last checked: 2026-10-17
- EPA UCMR 5 sample results — source period: 2023-01-03 – 2026-06-17; last checked: 2026-10-17
Administrative contact (EPA filing)
Lee, Nathan, C: 832-374-3008
An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.