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Petroleum Refining, major discharger, Wynnewood, Oklahoma. NPDES permit OK0000825, in force until Sep 30, 2028. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | monthly average | ≤ 35.5 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 64 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 504 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 908 lb/d | all year | 001 |
| Oxygen demand, chem. [high level] [COD] | monthly average | ≤ 248 mg/L | all year | 001 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 479 mg/L | all year | 001 |
| Oxygen demand, chem. [high level] [COD] | monthly average | ≤ 3510 lb/d | all year | 001 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 6790 lb/d | all year | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 404 lb/d | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 633 lb/d | all year | 001 |
| Oil and grease, hexane extr method | monthly average | ≤ 10 mg/L | all year | 001 |
| Oil and grease, hexane extr method | daily maximum | ≤ 20 mg/L | all year | 001 |
| Oil and grease, hexane extr method | monthly average | ≤ 150 lb/d | all year | 001 |
| Oil and grease, hexane extr method | daily maximum | ≤ 280 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 17.7 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 38.9 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 251 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 551 lb/d | all year | 001 |
| Sulfide, total [as S] | monthly average | ≤ .17 mg/L | all year | 001 |
| Sulfide, total [as S] | daily maximum | ≤ .38 mg/L | all year | 001 |
| Sulfide, total [as S] | monthly average | ≤ 2.4 lb/d | all year | 001 |
| Sulfide, total [as S] | daily maximum | ≤ 5.4 lb/d | all year | 001 |
| Phenolics, total recoverable | monthly average | ≤ .22 mg/L | all year | 001 |
| Phenolics, total recoverable | daily maximum | ≤ .48 mg/L | all year | 001 |
| Phenolics, total recoverable | monthly average | ≤ 3.1 lb/d | all year | 001 |
| Phenolics, total recoverable | daily maximum | ≤ 6.8 lb/d | 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 |
| E. coli | geometric mean | ≤ 126 CFU/100mL | May–Sep | 001 |
| E. coli | daily maximum | ≤ 406 CFU/100mL | May–Sep | 001 |
| Oxygen demand, chem. [high level] [COD] | monthly average | report only (mg/L) | all year | 002 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 120 mg/L | all year | 002 |
| pH | minimum | ≥ 6.5 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 002 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 002 |
| Oil and grease, hexane extr method | monthly average | report only (mg/L) | all year | 002 |
| Oil and grease, hexane extr method | daily maximum | ≤ 15 mg/L | all year | 002 |
| Lead, total [as Pb] | monthly average | ≤ 39 ug/L | all year | 002 |
| Lead, total [as Pb] | daily maximum | ≤ 71.2 ug/L | 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 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | 008 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 45 mg/L | all year | 008 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 341 lb/d | all year | 008 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 615 lb/d | all year | 008 |
| Oxygen demand, chem. [high level] [COD] | monthly average | ≤ 167 mg/L | all year | 008 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 324 mg/L | all year | 008 |
| Oxygen demand, chem. [high level] [COD] | monthly average | ≤ 2370 lb/d | all year | 008 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 4600 lb/d | all year | 008 |
| pH | minimum | ≥ 6.5 SU | all year | 008 |
| pH | maximum | ≤ 9 SU | all year | 008 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 008 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 008 |
| Solids, total suspended | monthly average | ≤ 274 lb/d | all year | 008 |
| Solids, total suspended | daily maximum | ≤ 429 lb/d | all year | 008 |
| Oil and grease, hexane extr method | monthly average | ≤ 7 mg/L | all year | 008 |
| Oil and grease, hexane extr method | daily maximum | ≤ 13 mg/L | all year | 008 |
| Oil and grease, hexane extr method | monthly average | ≤ 100 lb/d | all year | 008 |
| Oil and grease, hexane extr method | daily maximum | ≤ 190 lb/d | all year | 008 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 11.4 mg/L | all year | 008 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 25.1 mg/L | all year | 008 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 162 lb/d | all year | 008 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 356 lb/d | all year | 008 |
| Sulfide, total [as S] | monthly average | ≤ .11 mg/L | all year | 008 |
| Sulfide, total [as S] | daily maximum | ≤ .25 mg/L | all year | 008 |
| Sulfide, total [as S] | monthly average | ≤ 1.6 lb/d | all year | 008 |
| Sulfide, total [as S] | daily maximum | ≤ 3.5 lb/d | all year | 008 |
| Phenolics, total recoverable | monthly average | ≤ .16 mg/L | all year | 008 |
| Phenolics, total recoverable | daily maximum | ≤ .32 mg/L | all year | 008 |
| Phenolics, total recoverable | monthly average | ≤ 2.2 lb/d | all year | 008 |
| Phenolics, total recoverable | daily maximum | ≤ 4.6 lb/d | all year | 008 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 008 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 008 |
| E. coli | geometric mean | ≤ 126 CFU/100mL | May–Sep | 008 |
| E. coli | daily maximum | ≤ 406 CFU/100mL | May–Sep | 008 |
| pH | daily minimum | report only (SU) | all year | TX1 |
| pH | daily maximum | report only (SU) | all year | TX1 |
| Nitrogen, ammonia total [as N] | daily minimum | report only (mg/L) | all year | TX1 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | TX1 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | TX1 |
| Whole Effluent Toxicity [WET] - D. pulex | 48-hour minimum | ≥ 100 % | all year | TX1 |
| Whole Effluent Toxicity [WET] - P. promelas | 48-hour minimum | ≥ 100 % | all year | TX1 |
| Solids, total dissolved- 180 deg. C | daily minimum | report only (mg/L) | all year | TX1 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | all year | TX1 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | all year | TX1 |
| LC50 Static Renewal 48Hr Acute Daphnia pulex | 48-hour minimum | report only (%) | all year | TX1 |
| LC50 Static Renewal 48Hr Acute Pimephales promelas | 48-hour minimum | report only (%) | all year | TX1 |
| LC50 Pass/Fail Static Renewal 48Hr Acute Daphnia Pulex | 48-hour minimum | report only (pass=0;fail=1) | all year | TX1 |
| LC50 Static Renewal 48Hr Acute Pimephales promelas | 48-hour minimum | report only (pass=0;fail=1) | all year | TX1 |
| %Mortality Static Renewal 48Hr Acute Daphnia Pulex | 48-hour minimum | report only (%) | all year | TX1 |
| % Mortality Static Renewal 48 Hr Pimephales promelas or use TJA6C | 48-hour minimum | report only (%) | all year | TX1 |
Cited limits by parameter: Oklahoma's rules and the federal ones.
Same industry: the 6 Petroleum Refining and Related Industries permits in Oklahoma.
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On EPA ECHO: Facility report · DMR history
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