Clean Water Act discharge permit · NPDES TX0088331
THREE RIVERS REFINERY, Three Rivers, TX: NPDES TX0088331 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 28Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
THREE RIVERS REFINERY, held by DIAMOND SHAMROCK REFINING COMPANY, LP, holds NPDES permit TX0088331, which discharges to Unnamed Ditch; Nueces/Lower Frio River. EPA’s file records it issued June 15, 2016 and expiring January 1, 2020. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | THREE RIVERS REFINERY |
|---|---|
| Permittee as filed | DIAMOND SHAMROCK REFINING COMPANY, LP |
| NPDES ID | TX0088331 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | June 15, 2016 |
| Expiration date | January 1, 2020 |
| Address | Three Rivers, TX 78701 |
| Receiving water | UNNAMED DITCH; NUECES/LOWER FRIO RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Hackberry Creek-Frio River (HUC 121101080506) |
| SIC | 2911 – Petroleum Refining |
| Other EPA IDs (FRS) | RCRA handler TXD990709966; ICIS-AIR source TX0000004829700006 |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 41Pollutants on file
- 28Under a numeric limit
- 36With a violation of any kind
- 8With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Oxygen, dissolved [DO] | 1 | 6 | 5 | March 31, 2025 | 75% over the limit |
| Mercury, total [as Hg] | 0 | 9 | 3 | October 31, 2007 | 308% over the limit |
| pH | 4 | 12 | 2 | February 28, 2021 | |
| Solids, total dissolved | 5 | 13 | 1 | May 31, 2007 | 667% over the limit |
| pH range excursions, > 60 minutes | 1 | 10 | 1 | February 28, 2021 | 2,147,483,650% over the limit |
| BOD, 5-day, 20 deg. C | 0 | 9 | 1 | June 30, 2007 | 56% over the limit |
| Flow, in conduit or thru treatment plant | 5 | 7 | 1 | July 31, 2007 | 6% over the limit |
| Phenolics, total recoverable | 0 | 5 | 1 | May 31, 2007 | 8% over the limit |
| Oil & Grease | 3 | 9 | 0 | ||
| pH range excursions, monthly total accum | 1 | 9 | 0 | ||
| Nitrogen, ammonia total [as N] | 4 | 8 | 0 | ||
| Oxygen demand, chem. [high level] [COD] | 3 | 8 | 0 | ||
| Solids, total suspended | 2 | 6 | 0 | ||
| Sulfide, total [as S] | 2 | 6 | 0 | ||
| Chloride [as Cl] | 2 | 6 | 0 | ||
| Chromium, hexavalent [as Cr] | 2 | 6 | 0 | ||
| Chromium, total [as Cr] | 2 | 6 | 0 | ||
| Selenium, total [as Se] | 2 | 6 | 0 | ||
| Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex | 2 | 6 | 0 | ||
| LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas | 2 | 6 | 0 | ||
| NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex | 2 | 6 | 0 | ||
| NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas | 2 | 6 | 0 | ||
| LOAEC Lethal Static Renewal 48HR Acute Daphnia pulex | 2 | 6 | 0 | ||
| LOAEC Lethal Survival Static Renewal 48Hr Acute Pimephales promelas | 2 | 6 | 0 | ||
| Copper, total [as Cu] | 0 | 6 | 0 | ||
| Silver, total [as Ag] | 0 | 6 | 0 | ||
| Zinc, total [as Zn] | 0 | 6 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 4 | 4 | 0 | ||
| Cyanide, total [as CN] | 0 | 4 | 0 | ||
| Arsenic, total [as As] | 0 | 4 | 0 | ||
| Barium, total [as Ba] | 0 | 4 | 0 | ||
| Cadmium, total [as Cd] | 0 | 4 | 0 | ||
| Lead, total [as Pb] | 0 | 4 | 0 | ||
| Antimony, total [as Sb] | 0 | 4 | 0 | ||
| Coliform, fecal general | 0 | 4 | 0 | ||
| Phenols | 2 | 2 | 0 | ||
| Whole effluent toxicity | 4 | 0 | 0 | ||
| Whole effluent toxicity - retest #1 | 3 | 0 | 0 | ||
| Whole effluent toxicity - retest #2 | 3 | 0 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute D. Pulex | 1 | 0 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Pimephales promelas | 1 | 0 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 4Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| April 13, 2026 | Permit Violations - Violation Specified in Comment | ST6 |
| May 1, 2024 | Permit Violations - Violation Specified in Comment | ST6 |
| November 3, 2021 | Permit Violations - Violation Specified in Comment | ST6 |
| January 14, 2020 | Permit Violations - Violation Specified in Comment | ST6 |
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID TX0088331 there.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.