NPDES TX0007536 · Clean Water Act
SWEENY REFINERY AND PETROCHEMICAL COMPLEX, Sweeny, TX: NPDES TX0007536 discharge permit, effluent exceedances, inspections, penalties
SWEENY REFINERY AND PETROCHEMICAL COMPLEX, Sweeny, Texas: Individual permit TX0007536, held by PHILLIPS 66 COMPANY; Administratively continued; issued December 2, 2015, term to July 1, 2019; discharges to LINNVILLE BAYOU/CANEY CREEK.
2 of the 45 pollutants listed for NPDES TX0007536 have no violation or effluent exceedance.
- Cyanide, free [amenable to chlorination]: 4 limits, 49 violations of any kind, 44 effluent exceedances, latest March 31, 2022, largest 396% over the limit.
- pH: 16 limits, 90 violations of any kind, 22 effluent exceedances, latest June 30, 2026.
- Solids, total suspended: 2 limits, 24 violations of any kind, 20 effluent exceedances, latest March 31, 2023, largest 864% over the limit.
- pH range excursions, > 60 minutes: 1 limit, 10 violations of any kind, 7 effluent exceedances, latest June 30, 2026, largest 2,147,483,650% over the limit.
- Flow, in conduit or thru treatment plant: 16 limits, 61 violations of any kind, 5 effluent exceedances, latest August 31, 2020, largest 123% over the limit.
- Carbon, tot organic [TOC]: 7 limits, 39 violations of any kind, 5 effluent exceedances, latest January 31, 2025, largest 723% over the limit.
- Nitrogen, ammonia total [as N]: 2 limits, 9 violations of any kind, 5 effluent exceedances, latest September 30, 2024, largest 45% over the limit.
- Oil & Grease: 9 limits, 42 violations of any kind, 4 effluent exceedances, latest September 30, 2024, largest 198% over the limit.
- Oxygen, dissolved [DO]: 1 limit, 6 violations of any kind, 4 effluent exceedances, latest June 30, 2016, largest 35% over the limit.
- Enterococci: 4 limits, 8 violations of any kind, 2 effluent exceedances, latest May 31, 2024, largest 669% over the limit.
- BOD, 5-day, 20 deg. C: 3 limits, 11 violations of any kind, 1 effluent exceedance, latest April 30, 2018, largest 56% over the limit.
- Sulfide, total [as S]: 2 limits, 5 violations of any kind, 1 effluent exceedance, latest July 31, 2012, largest 33% over the limit.
- Mercury, total [as Hg]: 1 limit, 13 violations of any kind.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia: 4 limits, 7 violations of any kind.
- Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia): 4 limits, 6 violations of any kind.
- Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia: 4 limits, 6 violations of any kind.
- LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia): 4 limits, 6 violations of any kind.
- LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidia: 4 limits, 6 violations of any kind.
- LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia): 4 limits, 6 violations of any kind.
- LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidia: 4 limits, 6 violations of any kind.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia): 4 limits, 5 violations of any kind.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia: 4 limits, 5 violations of any kind.
- NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia): 4 limits, 5 violations of any kind.
- NOEC Lethal Static Renewal 7 Day Chronic Menidia menidia: 4 limits, 5 violations of any kind.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia): 4 limits, 5 violations of any kind.
- Oxygen demand, chem. [high level] [COD]: 2 limits, 4 violations of any kind.
- Chromium, hexavalent [as Cr]: 2 limits, 4 violations of any kind.
- Chromium, total [as Cr]: 2 limits, 4 violations of any kind.
- Zinc, total [as Zn]: 2 limits, 4 violations of any kind.
- Selenium, total [as Se]: 2 limits, 4 violations of any kind.
- Phenolic compounds, total: 2 limits, 4 violations of any kind.
- LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia): 1 limit, 3 violations of any kind.
- LC50 Pass/Fail Static 24Hr Acute Menidia menidia: 1 limit, 3 violations of any kind.
- pH range excursions, monthly total accum: 1 limit, 2 violations of any kind.
- Temperature, water deg. fahrenheit: 0 limits, 2 violations of any kind.
- Sulfate [as S]: 0 limits, 2 violations of any kind.
- Phenolics, total recoverable: 0 limits, 2 violations of any kind.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia beryllina: 0 limits, 2 violations of any kind.
- NOEC Lethal Static Renewal 7 Day Chronic Menidia beryllina: 0 limits, 2 violations of any kind.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina: 0 limits, 2 violations of any kind.
- Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina: 0 limits, 2 violations of any kind.
- LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia beryllina: 0 limits, 2 violations of any kind.
- LOEC Sub-Lethal Growth Static Renewal 7 Day Chronic Menidia beryllina: 0 limits, 2 violations of any kind.
- Whole effluent toxicity - retest #1: 7 limits.
- Whole effluent toxicity - retest #2: 7 limits.
- July 8, 2025: Permit Violations - Violation Specified in Comment (ST6).
SWEENY REFINERY AND PETROCHEMICAL COMPLEX among its neighbors
9 discharge permits are in the Brazos River-Gulf of Mexico subwatershed (HUC 120701040505); TX0007536 is one. Its county: 522, 24 major; TX0007536 is major permit.
Other permits in the Brazos River-Gulf of Mexico subwatershed (HUC 120701040505)
- BAR X RANCH, Angelton: TXR1501PN, minor, term to 2028-03-04
- BRAZOS RIVER DIVERSION CHANNEL PIPELINE REPLACEMENT, Freeport: TXR1568PE, minor, term to 2028-03-04
- BRAZOSPORT WATER AUTHORITY PLANT, Lake Jackson: TX0135887, minor, term to 2024-07-30
- CHEVRON PHILLIPS CHEMICAL SWEENY OLD OCEAN PLANT, Sweeny: TX0135917, major, term to 2024-08-28
- CITY OF FREEPORT CENTRAL WWTP, Freeport: TX0033332, major, term to 2025-05-08
- CITY OF LAKE JACKSON WWTP, Lake Jackson: TX0025798, major, term to 2024-08-14
- FREEPORT TEXAS OPERATIONS, Freeport: TX0006483, major, term to 2014-07-01
- HMSS PLANT - LAKE JACKSON, Lake Jackson: TXR05GU26, minor, term to 2026-08-13
Identity
| Facility | SWEENY REFINERY AND PETROCHEMICAL COMPLEX |
|---|---|
| Permittee | PHILLIPS 66 COMPANY |
| NPDES ID | TX0007536 |
| Status | Administratively continued |
| Type | Individual permit |
| Class | Major |
| Facility type | Non-POTW |
| Issued | December 2, 2015 |
| Expires | July 1, 2019 |
| Address | Sweeny, TX 77480 |
| Receiving water | LINNVILLE BAYOU/CANEY CREEK |
| Subwatershed | Brazos River-Gulf of Mexico (HUC 120701040505) |
| SIC | 2911 – Petroleum Refining |
| Other EPA IDs (FRS) | RCRA handler TXD048210645; ICIS-AIR source TX0000004803900010 |
NPDES TX0007536: effluent limits and exceedances
SWEENY REFINERY AND PETROCHEMICAL COMPLEX (NPDES TX0007536): 45 pollutants on file, 36 limited; 43 with a violation of any kind, 12 with an exceedance.
| Pollutant | Limits | Violations | Exceedances | Latest | Largest, as filed |
|---|---|---|---|---|---|
| Cyanide, free [amenable to chlorination] | 4 | 49 | 44 | March 31, 2022 | 396% over the limit |
| pH | 16 | 90 | 22 | June 30, 2026 | |
| Solids, total suspended | 2 | 24 | 20 | March 31, 2023 | 864% over the limit |
| pH range excursions, > 60 minutes | 1 | 10 | 7 | June 30, 2026 | 2,147,483,650% over the limit |
| Flow, in conduit or thru treatment plant | 16 | 61 | 5 | August 31, 2020 | 123% over the limit |
| Carbon, tot organic [TOC] | 7 | 39 | 5 | January 31, 2025 | 723% over the limit |
| Nitrogen, ammonia total [as N] | 2 | 9 | 5 | September 30, 2024 | 45% over the limit |
| Oil & Grease | 9 | 42 | 4 | September 30, 2024 | 198% over the limit |
| Oxygen, dissolved [DO] | 1 | 6 | 4 | June 30, 2016 | 35% over the limit |
| Enterococci | 4 | 8 | 2 | May 31, 2024 | 669% over the limit |
| BOD, 5-day, 20 deg. C | 3 | 11 | 1 | April 30, 2018 | 56% over the limit |
| Sulfide, total [as S] | 2 | 5 | 1 | July 31, 2012 | 33% over the limit |
| Mercury, total [as Hg] | 1 | 13 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia | 4 | 7 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 4 | 6 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia | 4 | 6 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 4 | 6 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidia | 4 | 6 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 4 | 6 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidia | 4 | 6 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 4 | 5 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia | 4 | 5 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 4 | 5 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Menidia menidia | 4 | 5 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 4 | 5 | 0 | ||
| Oxygen demand, chem. [high level] [COD] | 2 | 4 | 0 | ||
| Chromium, hexavalent [as Cr] | 2 | 4 | 0 | ||
| Chromium, total [as Cr] | 2 | 4 | 0 | ||
| Zinc, total [as Zn] | 2 | 4 | 0 | ||
| Selenium, total [as Se] | 2 | 4 | 0 | ||
| Phenolic compounds, total | 2 | 4 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | 1 | 3 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Menidia menidia | 1 | 3 | 0 | ||
| pH range excursions, monthly total accum | 1 | 2 | 0 | ||
| Temperature, water deg. fahrenheit | 0 | 2 | 0 | ||
| Sulfate [as S] | 0 | 2 | 0 | ||
| Phenolics, total recoverable | 0 | 2 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia beryllina | 0 | 2 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Menidia beryllina | 0 | 2 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | 0 | 2 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | 0 | 2 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia beryllina | 0 | 2 | 0 | ||
| LOEC Sub-Lethal Growth Static Renewal 7 Day Chronic Menidia beryllina | 0 | 2 | 0 | ||
| Whole effluent toxicity - retest #1 | 7 | 0 | 0 | ||
| Whole effluent toxicity - retest #2 | 7 | 0 | 0 |
NPDES TX0007536: inspections, violations and enforcement
NPDES TX0007536: 1 single-event violation
| Date | What EPA recorded | Agency |
|---|---|---|
| July 8, 2025 | Permit Violations - Violation Specified in Comment | ST6 |
NPDES TX0007536 (SWEENY REFINERY AND PETROCHEMICAL COMPLEX): no inspection, formal enforcement action and informal enforcement action on file.
Watch NPDES TX0007536
NPDES TX0007536: one email when its EPA record changes — $99/month.
Permits near NPDES TX0007536
NPDES TX0007536: 45 pollutant rows, 1 dated events; ICIS-NPDES download, loaded October 14, 2026.