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Petroleum Refining, major discharger, Meraux, Louisiana. NPDES permit LA0003646 expired May 31, 2024; its limits still apply. Last 12 months: over a limit 3 times (last March 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| November 2025 | Solids, total suspended, daily maximum | 2702 lb/d | ≤ 1561 lb/d | 73% |
| March 2026 | Sulfide, total [as S], daily maximum | 39.4 lb/d | ≤ 14.1 lb/d | 179% |
| March 2026 | Sulfide, total [as S], monthly average | 9.31 lb/d | ≤ 6.3 lb/d | 48% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 001 |
| Temperature, water deg. fahrenheit | daily maximum | ≤ 120 deg F | all year | 001 |
| pH | minimum | report only (SU) | all year | 001 |
| pH | maximum | report only (SU) | all year | 001 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 5 mg/L | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| pH range excursions, > 60 minutes | monthly total | ≤ 0 occur/mo | all year | 001 |
| pH range excursions, monthly total accum | monthly total | ≤ 446 min | all year | 001 |
| pH | minimum | report only (SU) | all year | 002 |
| pH | maximum | report only (SU) | all year | 002 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 50 mg/L | all year | 002 |
| Whole effluent toxicity - retest #1 | monthly average minimum | report only (pass=0;fail=1) | all year | 002 |
| Whole effluent toxicity - retest #1 | monthly average minimum | report only (pass=0;fail=1) | all year | 002 |
| Whole effluent toxicity - retest #1 | 48-hour minimum | report only (pass=0;fail=1) | all year | 002 |
| Whole effluent toxicity - retest #1 | 48-hour minimum | report only (pass=0;fail=1) | all year | 002 |
| Whole effluent toxicity - retest #2 | monthly average minimum | report only (pass=0;fail=1) | all year | 002 |
| Whole effluent toxicity - retest #2 | monthly average minimum | report only (pass=0;fail=1) | all year | 002 |
| Whole effluent toxicity - retest #2 | 48-hour minimum | report only (pass=0;fail=1) | all year | 002 |
| Whole effluent toxicity - retest #2 | 48-hour minimum | report only (pass=0;fail=1) | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Whole Effluent Toxicity - Retest #3 | monthly average minimum | report only (pass=0;fail=1) | all year | 002 |
| Whole Effluent Toxicity - Retest #3 | monthly average minimum | report only (pass=0;fail=1) | all year | 002 |
| Whole Effluent Toxicity - Retest #3 | 48-hour minimum | report only (pass=0;fail=1) | all year | 002 |
| Whole Effluent Toxicity - Retest #3 | 48-hour minimum | report only (pass=0;fail=1) | all year | 002 |
| pH range excursions, > 60 minutes | monthly total | ≤ 0 occur/mo | all year | 002 |
| pH range excursions, monthly total accum | monthly total | ≤ 446 min | all year | 002 |
| Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex | monthly average minimum | report only (pass=0;fail=1) | all year | 002 |
| Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex | 48-hour minimum | report only (pass=0;fail=1) | all year | 002 |
| LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas | monthly average minimum | report only (pass=0;fail=1) | all year | 002 |
| LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas | 48-hour minimum | report only (pass=0;fail=1) | all year | 002 |
| NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex | monthly average minimum | report only (%) | all year | 002 |
| NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex | 48-hour minimum | report only (%) | all year | 002 |
| NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas | monthly average minimum | report only (%) | all year | 002 |
| NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas | 48-hour minimum | report only (%) | all year | 002 |
| Coef Of Var Static Renewal 48Hr Acute D. pulex | maximum | report only (%) | all year | 002 |
| Coef Of Var Static Renewal 48Hr Acute Pimephales promelas | maximum | report only (%) | all year | 002 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 003 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 003 |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year | 003 |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year | 003 |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year | 003 |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year | 003 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 50 mg/L | all year | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 004 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 004 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 004 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 50 mg/L | all year | 004 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 004 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 015 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 015 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 015 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 50 mg/L | all year | 015 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 015 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 015 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 016 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 016 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 016 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 50 mg/L | all year | 016 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 016 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 016 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 020 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 020 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 020 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 50 mg/L | all year | 020 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 020 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 020 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 021A |
| pH | instantaneous maximum | ≤ 9 SU | all year | 021A |
| Solids, total suspended | daily maximum | ≤ 90 mg/L | all year | 021A |
| Solids, total suspended | daily maximum | ≤ 90 mg/L | all year | 021A |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 021A |
| Carbon, tot organic [TOC] | daily maximum | ≤ 50 mg/L | all year | 021A |
| Lead, total [as Pb] | daily maximum | ≤ 50 ug/L | all year | 021A |
| Benzene | daily maximum | ≤ 50 ug/L | all year | 021A |
| BTEX | daily maximum | ≤ 250 ug/L | all year | 021A |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 021A |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 021A |
| pH | instantaneous minimum | ≥ 6 SU | all year | 021B |
| pH | instantaneous maximum | ≤ 9 SU | all year | 021B |
| Solids, total suspended | daily maximum | ≤ 90 mg/L | all year | 021B |
| Solids, total suspended | daily maximum | ≤ 90 mg/L | all year | 021B |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 021B |
| Carbon, tot organic [TOC] | daily maximum | ≤ 50 mg/L | all year | 021B |
| Lead, total [as Pb] | daily maximum | ≤ 50 ug/L | all year | 021B |
| Benzene | daily maximum | ≤ 50 ug/L | all year | 021B |
| BTEX | daily maximum | ≤ 250 ug/L | all year | 021B |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 021B |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 021B |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 102 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 102 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 1243 lb/d | all year | 302 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 2239 lb/d | all year | 302 |
| Oxygen demand, chem. [high level] [COD] | monthly average | ≤ 8674 lb/d | all year | 302 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 16739 lb/d | all year | 302 |
| Solids, total suspended | monthly average | ≤ 996 lb/d | all year | 302 |
| Solids, total suspended | daily maximum | ≤ 1561 lb/d | all year | 302 |
| Oil & Grease | monthly average | ≤ 362 lb/d | all year | 302 |
| Oil & Grease | daily maximum | ≤ 680 lb/d | all year | 302 |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year | 302 |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year | 302 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 653 lb/d | all year | 302 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1437 lb/d | all year | 302 |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year | 302 |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year | 302 |
| Sulfide, total [as S] | monthly average | ≤ 6.3 lb/d | all year | 302 |
| Sulfide, total [as S] | daily maximum | ≤ 14.1 lb/d | all year | 302 |
| Chromium, hexavalent [as Cr] | monthly average | ≤ .9 lb/d | all year | 302 |
| Chromium, hexavalent [as Cr] | daily maximum | ≤ 2.1 lb/d | all year | 302 |
| Chromium, total [as Cr] | monthly average | ≤ 11.1 lb/d | all year | 302 |
| Chromium, total [as Cr] | daily maximum | ≤ 32 lb/d | all year | 302 |
| Phenolics, total recoverable | monthly average | ≤ 8.1 lb/d | all year | 302 |
| Phenolics, total recoverable | daily maximum | ≤ 16.7 lb/d | all year | 302 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 302 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 302 |
| Whole effluent toxicity - retest #1 | monthly average minimum | report only (pass=0;fail=1) | all year | TOX |
| Whole effluent toxicity - retest #1 | monthly average minimum | report only (pass=0;fail=1) | all year | TOX |
| Whole effluent toxicity - retest #1 | 48-hour minimum | report only (pass=0;fail=1) | all year | TOX |
| Whole effluent toxicity - retest #1 | 48-hour minimum | report only (pass=0;fail=1) | all year | TOX |
| Whole effluent toxicity - retest #2 | monthly average minimum | report only (pass=0;fail=1) | all year | TOX |
| Whole effluent toxicity - retest #2 | monthly average minimum | report only (pass=0;fail=1) | all year | TOX |
| Whole effluent toxicity - retest #2 | 48-hour minimum | report only (pass=0;fail=1) | all year | TOX |
| Whole effluent toxicity - retest #2 | 48-hour minimum | report only (pass=0;fail=1) | all year | TOX |
| Whole Effluent Toxicity - Retest #3 | monthly average minimum | report only (pass=0;fail=1) | all year | TOX |
| Whole Effluent Toxicity - Retest #3 | monthly average minimum | report only (pass=0;fail=1) | all year | TOX |
| Whole Effluent Toxicity - Retest #3 | 48-hour minimum | report only (pass=0;fail=1) | all year | TOX |
| Whole Effluent Toxicity - Retest #3 | 48-hour minimum | report only (pass=0;fail=1) | all year | TOX |
| Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex | monthly average minimum | report only (pass=0;fail=1) | all year | TOX |
| Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex | 48-hour minimum | report only (pass=0;fail=1) | all year | TOX |
| LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas | monthly average minimum | report only (pass=0;fail=1) | all year | TOX |
| LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas | 48-hour minimum | report only (pass=0;fail=1) | all year | TOX |
| NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex | monthly average minimum | report only (%) | all year | TOX |
| NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex | 48-hour minimum | report only (%) | all year | TOX |
| NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas | monthly average minimum | report only (%) | all year | TOX |
| NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas | 48-hour minimum | report only (%) | all year | TOX |
| Coef Of Var Static Renewal 48Hr Acute D. pulex | maximum | report only (%) | all year | TOX |
| Coef Of Var Static Renewal 48Hr Acute Pimephales promelas | maximum | report only (%) | all year | TOX |
Cited limits by parameter: Louisiana's rules and the federal ones.
Same industry: the 26 Petroleum Refining and Related Industries permits in Louisiana.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/LA0003646 · MCP: https://passage-data.com/mcp