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Petroleum Refining, major discharger, Sweeny, Texas. NPDES permit TX0007536, in force until Aug 6, 2031. Last 12 months: over a limit 6 times (last June 2026), 7 required values missing, 8 of 104 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Outfall | Parameter | Reported | Limit |
|---|---|---|---|---|
| December 2025 | 011 | pH, maximum | 9.3 SU | ≤ 9 SU |
| March 2026 | 011 | pH, minimum | 2.6 SU | ≥ 6 SU |
| March 2026 | 011 | pH range excursions, > 60 minutes, monthly total | 1 occur/mo | ≤ 0 occur/mo |
| June 2026 | 009 | pH, maximum | 9.6 SU | ≤ 9 SU |
| June 2026 | 011 | pH, maximum | 9.1 SU | ≤ 9 SU |
| June 2026 | 011 | pH range excursions, > 60 minutes, monthly total | 1 occur/mo | ≤ 0 occur/mo |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | minimum | ≥ 6 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 002 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 70 mg/L | all year | 002 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| pH | minimum | ≥ 6 SU | all year | 003 |
| pH | minimum | ≥ 6 SU | all year | 003 |
| pH | maximum | ≤ 9 SU | all year | 003 |
| pH | maximum | ≤ 9 SU | all year | 003 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 003 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 003 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 70 mg/L | all year | 003 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 70 mg/L | all year | 003 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| pH | minimum | ≥ 6 SU | all year | 005 |
| pH | maximum | ≤ 9 SU | all year | 005 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 005 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 55 mg/L | all year | 005 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 005 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 005 |
| pH | minimum | ≥ 6 SU | all year | 006 |
| pH | maximum | ≤ 9 SU | all year | 006 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 006 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 75 mg/L | all year | 006 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 006 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 006 |
| pH | minimum | ≥ 6 SU | all year | 009 |
| pH | maximum | ≤ 9 SU | all year | 009 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 009 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 75 mg/L | all year | 009 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 009 |
| Aluminum, total [as Al] | daily maximum | report only (mg/L) | all year | 009 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 009 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 009 |
| pH | minimum | ≥ 6 SU | all year | 010 |
| pH | maximum | ≤ 9 SU | all year | 010 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 010 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 75 mg/L | all year | 010 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 010 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 010 |
| Oxygen, dissolved [DO] | monthly minimum | ≥ 2 mg/L | all year | 011 |
| BOD, 5-day, 20 deg. C | daily average | report only (mg/L) | all year | 011 |
| BOD, 5-day, 20 deg. C | daily average | ≤ 2700 lb/d | all year | 011 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 5063 lb/d | all year | 011 |
| Oxygen demand, chem. [high level] [COD] | daily average | ≤ 16992 lb/d | all year | 011 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 33079 lb/d | all year | 011 |
| pH | minimum | ≥ 6 SU | all year | 011 |
| pH | maximum | ≤ 9 SU | all year | 011 |
| Solids, total suspended | daily average | ≤ 2707 lb/d | all year | 011 |
| Solids, total suspended | daily maximum | ≤ 5474 lb/d | all year | 011 |
| Oil & Grease | daily average | ≤ 1108 lb/d | all year | 011 |
| Oil & Grease | daily maximum | ≤ 1894 lb/d | all year | 011 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 555 lb/d | all year | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2310.9 lb/d | all year | 011 |
| Cyanide, free [amenable to chlorination] | daily average | ≤ .0087 mg/L | all year | 011 |
| Cyanide, free [amenable to chlorination] | daily maximum | ≤ .0186 mg/L | all year | 011 |
| Sulfide, total [as S] | daily average | ≤ 15.7 lb/d | all year | 011 |
| Sulfide, total [as S] | daily maximum | ≤ 33.9 lb/d | all year | 011 |
| Chromium, hexavalent [as Cr] | daily average | ≤ 13.3 lb/d | all year | 011 |
| Chromium, hexavalent [as Cr] | daily maximum | ≤ 27.2 lb/d | all year | 011 |
| Chromium, total [as Cr] | daily average | ≤ 38.4 lb/d | all year | 011 |
| Chromium, total [as Cr] | daily maximum | ≤ 90.1 lb/d | all year | 011 |
| Zinc, total [as Zn] | daily average | report only (mg/L) | all year | 011 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 011 |
| Selenium, total [as Se] | daily average | report only (mg/L) | all year | 011 |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year | 011 |
| Flow, in conduit or thru treatment plant | daily average | ≤ 9.5 MGD | all year | 011 |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ 12.5 MGD | all year | 011 |
| Enterococci | daily average | ≤ 35 CFU/100mL | all year | 011 |
| Enterococci | daily maximum | ≤ 104 CFU/100mL | all year | 011 |
| Phenolic compounds, total | daily average | ≤ 16 lb/d | all year | 011 |
| Phenolic compounds, total | daily maximum | ≤ 33.2 lb/d | all year | 011 |
| Mercury, total [as Hg] | daily maximum | report only (mg/L) | all year | 011 |
| pH range excursions, > 60 minutes | monthly total | ≤ 0 occur/mo | all year | 011 |
| pH range excursions, monthly total accum | monthly total | ≤ 446 min | all year | 011 |
| pH | minimum | ≥ 6 SU | all year | 012 |
| pH | maximum | ≤ 9 SU | all year | 012 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 012 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 70 mg/L | all year | 012 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 012 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 012 |
| Sulfate [as S] | daily average | ≤ 395 mg/L | all year | 013 |
| Sulfate [as S] | daily maximum | ≤ 795 mg/L | all year | 013 |
| pH | minimum | ≥ 6 SU | all year | 013 |
| pH | maximum | ≤ 9 SU | all year | 013 |
| Oil & Grease | daily average | ≤ 10 mg/L | all year | 013 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 013 |
| Carbon, tot organic [TOC] | daily average | ≤ 50 mg/L | all year | 013 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 75 mg/L | all year | 013 |
| Zinc, total [as Zn] | daily average | report only (mg/L) | all year | 013 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 013 |
| Aluminum, total [as Al] | daily average | report only (mg/L) | all year | 013 |
| Aluminum, total [as Al] | daily maximum | report only (mg/L) | all year | 013 |
| Flow [dry weather] | daily average | ≤ .216 MGD | all year | 013 |
| Flow [dry weather] | daily maximum | ≤ .64 MGD | all year | 013 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 7-day minimum | report only (pass=0;fail=1) | all year | TX11 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | monthly average minimum | report only (pass=0;fail=1) | all year | TX11 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (pass=0;fail=1) | all year | TX11 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (pass=0;fail=1) | all year | TX11 |
| NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7-day minimum | report only (%) | all year | TX11 |
| NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | monthly average minimum | report only (%) | all year | TX11 |
| NOEC Lethal Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (%) | all year | TX11 |
| NOEC Lethal Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (%) | all year | TX11 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7-day minimum | report only (%) | all year | TX11 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | monthly average minimum | report only (%) | all year | TX11 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (%) | all year | TX11 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (%) | all year | TX11 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7-day minimum | report only (pass=0;fail=1) | all year | TX11 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | monthly average minimum | report only (pass=0;fail=1) | all year | TX11 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (pass=0;fail=1) | all year | TX11 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (pass=0;fail=1) | all year | TX11 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 7-day minimum | report only (%) | all year | TX11 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | monthly average minimum | report only (%) | all year | TX11 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (%) | all year | TX11 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (%) | all year | TX11 |
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 7-day minimum | report only (%) | all year | TX11 |
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | monthly average minimum | report only (%) | all year | TX11 |
| LOEC Sub-Lethal Growth Static Renewal 7 Day Chronic Menidia beryllina | 7-day minimum | report only (%) | all year | TX11 |
| LOEC Sub-Lethal Growth Static Renewal 7 Day Chronic Menidia beryllina | monthly average minimum | report only (%) | all year | TX11 |
| LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | single sample | report only (pass=0;fail=1) | all year | TXK |
| LC50 Pass/Fail Static 24Hr Acute Menidia beryllina | single sample | report only (pass=0;fail=1) | all year | TXK |
| Parameter | New limit | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|
| Sulfate [as S], daily average | 375 mg/L | tighter | 30 mg/L (8 values) | 0.08× |
Cited limits by parameter: Texas's rules and the federal ones.
Same industry: the 32 Petroleum Refining and Related Industries permits in Texas.
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On EPA ECHO: Facility report · DMR history
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