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Crude Petroleum And Natural Gas, (Unknown City), Wyoming. NPDES permit WY0031461, in force until May 31, 2028. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Specific conductance | daily maximum | ≤ 7500 umho/cm | all year | 001 |
| pH | instantaneous minimum | ≥ 6.5 SU (alert, not enforceable) | all year | 001 |
| pH | instantaneous minimum | ≥ 6.5 SU (alert, not enforceable) | all year | 001 |
| pH | instantaneous maximum | ≤ 9 SU (alert, not enforceable) | all year | 001 |
| pH | instantaneous maximum | ≤ 9 SU (alert, not enforceable) | all year | 001 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Sulfide, total [as S] | daily maximum | report only (mg/L) | all year | 001 |
| Sulfide, total [as S] | daily maximum | report only (mg/L) | all year | 001 |
| Sulfate, total [as SO4] | daily maximum | ≤ 3000 mg/L | all year | 001 |
| Phosphate, ortho [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Chloride | daily maximum | ≤ 2000 mg/L | all year | 001 |
| Flow | daily maximum | report only (MGD) | all year | 001 |
| Flow | daily maximum | report only (MGD) | all year | 001 |
| Flow | monthly average | report only (MGD) | all year | 001 |
| Flow | monthly average | report only (MGD) | all year | 001 |
| Produced water, oil and grease | daily maximum | ≤ 10 mg/L | all year | 001 |
| Produced water, oil and grease | daily maximum | ≤ 10 mg/L | all year | 001 |
| Specific conductance | daily maximum | ≤ 7500 umho/cm | all year | 002 |
| pH | instantaneous minimum | ≥ 6.5 SU (alert, not enforceable) | all year | 002 |
| pH | instantaneous minimum | ≥ 6.5 SU (alert, not enforceable) | all year | 002 |
| pH | instantaneous maximum | ≤ 9 SU (alert, not enforceable) | all year | 002 |
| pH | instantaneous maximum | ≤ 9 SU (alert, not enforceable) | all year | 002 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 002 |
| Sulfide, total [as S] | daily maximum | report only (mg/L) | all year | 002 |
| Sulfide, total [as S] | daily maximum | report only (mg/L) | all year | 002 |
| Sulfate, total [as SO4] | daily maximum | ≤ 3000 mg/L | all year | 002 |
| Phosphate, ortho [as P] | daily maximum | report only (mg/L) | all year | 002 |
| Chloride | daily maximum | ≤ 2000 mg/L | all year | 002 |
| Flow | daily maximum | report only (MGD) | all year | 002 |
| Flow | daily maximum | report only (MGD) | all year | 002 |
| Flow | monthly average | report only (MGD) | all year | 002 |
| Flow | monthly average | report only (MGD) | all year | 002 |
| Produced water, oil and grease | daily maximum | ≤ 10 mg/L | all year | 002 |
| Produced water, oil and grease | daily maximum | ≤ 10 mg/L | all year | 002 |
| Specific conductance | daily maximum | ≤ 7500 umho/cm | all year | 003 |
| pH | instantaneous minimum | ≥ 6.5 SU (alert, not enforceable) | all year | 003 |
| pH | instantaneous minimum | ≥ 6.5 SU (alert, not enforceable) | all year | 003 |
| pH | instantaneous maximum | ≤ 9 SU (alert, not enforceable) | all year | 003 |
| pH | instantaneous maximum | ≤ 9 SU (alert, not enforceable) | all year | 003 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 003 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 003 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 003 |
| Sulfide, total [as S] | daily maximum | report only (mg/L) | all year | 003 |
| Sulfide, total [as S] | daily maximum | report only (mg/L) | all year | 003 |
| Sulfate, total [as SO4] | daily maximum | ≤ 3000 mg/L | all year | 003 |
| Phosphate, ortho [as P] | daily maximum | report only (mg/L) | all year | 003 |
| Chloride | daily maximum | ≤ 2000 mg/L | all year | 003 |
| Flow | daily maximum | report only (MGD) | all year | 003 |
| Flow | daily maximum | report only (MGD) | all year | 003 |
| Flow | monthly average | report only (MGD) | all year | 003 |
| Flow | monthly average | report only (MGD) | all year | 003 |
| Produced water, oil and grease | daily maximum | ≤ 10 mg/L | all year | 003 |
| Produced water, oil and grease | daily maximum | ≤ 10 mg/L | all year | 003 |
| Specific conductance | daily maximum | ≤ 7500 umho/cm | all year | 004 |
| pH | instantaneous minimum | ≥ 6.5 SU (alert, not enforceable) | all year | 004 |
| pH | instantaneous minimum | ≥ 6.5 SU (alert, not enforceable) | all year | 004 |
| pH | instantaneous maximum | ≤ 9 SU (alert, not enforceable) | all year | 004 |
| pH | instantaneous maximum | ≤ 9 SU (alert, not enforceable) | all year | 004 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 004 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 004 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 004 |
| Sulfide, total [as S] | daily maximum | report only (mg/L) | all year | 004 |
| Sulfide, total [as S] | daily maximum | report only (mg/L) | all year | 004 |
| Sulfate, total [as SO4] | daily maximum | ≤ 3000 mg/L | all year | 004 |
| Phosphate, ortho [as P] | daily maximum | report only (mg/L) | all year | 004 |
| Chloride | daily maximum | ≤ 2000 mg/L | all year | 004 |
| Flow | daily maximum | report only (MGD) | all year | 004 |
| Flow | daily maximum | report only (MGD) | all year | 004 |
| Flow | monthly average | report only (MGD) | all year | 004 |
| Flow | monthly average | report only (MGD) | all year | 004 |
| Produced water, oil and grease | daily maximum | ≤ 10 mg/L | all year | 004 |
| Produced water, oil and grease | daily maximum | ≤ 10 mg/L | all year | 004 |
| Specific conductance | daily maximum | ≤ 7500 umho/cm | all year | 005 |
| pH | instantaneous minimum | ≥ 6.5 SU (alert, not enforceable) | all year | 005 |
| pH | instantaneous minimum | ≥ 6.5 SU (alert, not enforceable) | all year | 005 |
| pH | instantaneous maximum | ≤ 9 SU (alert, not enforceable) | all year | 005 |
| pH | instantaneous maximum | ≤ 9 SU (alert, not enforceable) | all year | 005 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 005 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 005 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 005 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 005 |
| Sulfide, total [as S] | daily maximum | report only (mg/L) | all year | 005 |
| Sulfide, total [as S] | daily maximum | report only (mg/L) | all year | 005 |
| Sulfate, total [as SO4] | daily maximum | ≤ 3000 mg/L | all year | 005 |
| Phosphate, ortho [as P] | daily maximum | report only (mg/L) | all year | 005 |
| Chloride | daily maximum | ≤ 2000 mg/L | all year | 005 |
| Flow | daily maximum | report only (MGD) | all year | 005 |
| Flow | daily maximum | report only (MGD) | all year | 005 |
| Flow | monthly average | report only (MGD) | all year | 005 |
| Flow | monthly average | report only (MGD) | all year | 005 |
| Produced water, oil and grease | daily maximum | ≤ 10 mg/L | all year | 005 |
| Produced water, oil and grease | daily maximum | ≤ 10 mg/L | all year | 005 |
| Specific conductance | daily maximum | ≤ 7500 umho/cm | all year | 006 |
| pH | instantaneous minimum | ≥ 6.5 SU (alert, not enforceable) | all year | 006 |
| pH | instantaneous minimum | ≥ 6.5 SU (alert, not enforceable) | all year | 006 |
| pH | instantaneous maximum | ≤ 9 SU (alert, not enforceable) | all year | 006 |
| pH | instantaneous maximum | ≤ 9 SU (alert, not enforceable) | all year | 006 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 006 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 006 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 006 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 006 |
| Sulfide, total [as S] | daily maximum | report only (mg/L) | all year | 006 |
| Sulfide, total [as S] | daily maximum | report only (mg/L) | all year | 006 |
| Sulfate, total [as SO4] | daily maximum | ≤ 3000 mg/L | all year | 006 |
| Phosphate, ortho [as P] | daily maximum | report only (mg/L) | all year | 006 |
| Chloride | daily maximum | ≤ 2000 mg/L | all year | 006 |
| Flow | daily maximum | report only (MGD) | all year | 006 |
| Flow | daily maximum | report only (MGD) | all year | 006 |
| Flow | monthly average | report only (MGD) | all year | 006 |
| Flow | monthly average | report only (MGD) | all year | 006 |
| Produced water, oil and grease | daily maximum | ≤ 10 mg/L | all year | 006 |
| Produced water, oil and grease | daily maximum | ≤ 10 mg/L | all year | 006 |
| Specific conductance | daily maximum | ≤ 7500 umho/cm | all year | 007 |
| pH | instantaneous minimum | ≥ 6.5 SU (alert, not enforceable) | all year | 007 |
| pH | instantaneous minimum | ≥ 6.5 SU (alert, not enforceable) | all year | 007 |
| pH | instantaneous maximum | ≤ 9 SU (alert, not enforceable) | all year | 007 |
| pH | instantaneous maximum | ≤ 9 SU (alert, not enforceable) | all year | 007 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 007 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 007 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 007 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 007 |
| Sulfide, total [as S] | daily maximum | report only (mg/L) | all year | 007 |
| Sulfide, total [as S] | daily maximum | report only (mg/L) | all year | 007 |
| Sulfate, total [as SO4] | daily maximum | ≤ 3000 mg/L | all year | 007 |
| Phosphate, ortho [as P] | daily maximum | report only (mg/L) | all year | 007 |
| Chloride | daily maximum | ≤ 2000 mg/L | all year | 007 |
| Flow | daily maximum | report only (MGD) | all year | 007 |
| Flow | daily maximum | report only (MGD) | all year | 007 |
| Flow | monthly average | report only (MGD) | all year | 007 |
| Flow | monthly average | report only (MGD) | all year | 007 |
| Produced water, oil and grease | daily maximum | ≤ 10 mg/L | all year | 007 |
| Produced water, oil and grease | daily maximum | ≤ 10 mg/L | all year | 007 |
| Specific conductance | daily maximum | ≤ 7500 umho/cm | all year | 008 |
| pH | instantaneous minimum | ≥ 6.5 SU (alert, not enforceable) | all year | 008 |
| pH | instantaneous minimum | ≥ 6.5 SU (alert, not enforceable) | all year | 008 |
| pH | instantaneous maximum | ≤ 9 SU (alert, not enforceable) | all year | 008 |
| pH | instantaneous maximum | ≤ 9 SU (alert, not enforceable) | all year | 008 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 008 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 008 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 008 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 008 |
| Sulfide, total [as S] | daily maximum | report only (mg/L) | all year | 008 |
| Sulfide, total [as S] | daily maximum | report only (mg/L) | all year | 008 |
| Sulfate, total [as SO4] | daily maximum | ≤ 3000 mg/L | all year | 008 |
| Phosphate, ortho [as P] | daily maximum | report only (mg/L) | all year | 008 |
| Chloride | daily maximum | ≤ 2000 mg/L | all year | 008 |
| Flow | daily maximum | report only (MGD) | all year | 008 |
| Flow | daily maximum | report only (MGD) | all year | 008 |
| Flow | monthly average | report only (MGD) | all year | 008 |
| Flow | monthly average | report only (MGD) | all year | 008 |
| Produced water, oil and grease | daily maximum | ≤ 10 mg/L | all year | 008 |
| Produced water, oil and grease | daily maximum | ≤ 10 mg/L | all year | 008 |
| Specific conductance | daily maximum | ≤ 7500 umho/cm | all year | 009 |
| pH | instantaneous minimum | ≥ 6.5 SU (alert, not enforceable) | all year | 009 |
| pH | instantaneous minimum | ≥ 6.5 SU (alert, not enforceable) | all year | 009 |
| pH | instantaneous maximum | ≤ 9 SU (alert, not enforceable) | all year | 009 |
| pH | instantaneous maximum | ≤ 9 SU (alert, not enforceable) | all year | 009 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 009 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 009 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 009 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 009 |
| Sulfide, total [as S] | daily maximum | report only (mg/L) | all year | 009 |
| Sulfide, total [as S] | daily maximum | report only (mg/L) | all year | 009 |
| Sulfate, total [as SO4] | daily maximum | ≤ 3000 mg/L | all year | 009 |
| Phosphate, ortho [as P] | daily maximum | report only (mg/L) | all year | 009 |
| Chloride | daily maximum | ≤ 2000 mg/L | all year | 009 |
| Flow | daily maximum | report only (MGD) | all year | 009 |
| Flow | daily maximum | report only (MGD) | all year | 009 |
| Flow | monthly average | report only (MGD) | all year | 009 |
| Flow | monthly average | report only (MGD) | all year | 009 |
| Produced water, oil and grease | daily maximum | ≤ 10 mg/L | all year | 009 |
| Produced water, oil and grease | daily maximum | ≤ 10 mg/L | all year | 009 |
| Specific conductance | daily maximum | ≤ 7500 umho/cm | all year | 010 |
| pH | instantaneous minimum | ≥ 6.5 SU (alert, not enforceable) | all year | 010 |
| pH | instantaneous minimum | ≥ 6.5 SU (alert, not enforceable) | all year | 010 |
| pH | instantaneous maximum | ≤ 9 SU (alert, not enforceable) | all year | 010 |
| pH | instantaneous maximum | ≤ 9 SU (alert, not enforceable) | all year | 010 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 010 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 010 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 010 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 010 |
| Sulfide, total [as S] | daily maximum | report only (mg/L) | all year | 010 |
| Sulfide, total [as S] | daily maximum | report only (mg/L) | all year | 010 |
| Sulfate, total [as SO4] | daily maximum | ≤ 3000 mg/L | all year | 010 |
| Phosphate, ortho [as P] | daily maximum | report only (mg/L) | all year | 010 |
| Chloride | daily maximum | ≤ 2000 mg/L | all year | 010 |
| Flow | daily maximum | report only (MGD) | all year | 010 |
| Flow | daily maximum | report only (MGD) | all year | 010 |
| Flow | monthly average | report only (MGD) | all year | 010 |
| Flow | monthly average | report only (MGD) | all year | 010 |
| Produced water, oil and grease | daily maximum | ≤ 10 mg/L | all year | 010 |
| Produced water, oil and grease | daily maximum | ≤ 10 mg/L | all year | 010 |
Cited limits by parameter: Wyoming's rules and the federal ones.
Same industry: the 209 Oil and Gas Extraction permits in Wyoming.
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