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Electric Services, major discharger, Steedman, Missouri. NPDES permit MO0098001 expired Jun 30, 2025; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 001 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 001 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | ≤ 15 mg/L | all year | 001 |
| Oil and grease [soxhlet extr.] tot. | monthly average | ≤ 10 mg/L | all year | 001 |
| Boron, total recoverable | daily maximum | ≤ 8000 mg/L | all year | 001 |
| Boron, total recoverable | monthly average | report only (mg/L) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | value | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/min) | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ 200 ug/L | all year | 001 |
| Chlorine, total residual | monthly average | ≤ 104 ug/L | all year | 001 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 002 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 002 |
| pH | minimum | report only (SU) | all year | 002 |
| pH | maximum | report only (SU) | all year | 002 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 002 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 002 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | ≤ 15 mg/L | all year | 002 |
| Oil and grease [soxhlet extr.] tot. | monthly average | ≤ 10 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 002 |
| Biocides | daily maximum | ≤ 50 ug/L | all year | 002 |
| Biocides | monthly average | ≤ 50 ug/L | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Chlorine, total residual | daily maximum | ≤ 200 ug/L | all year | 002 |
| Chlorine, total residual | monthly average | ≤ 104 ug/L | all year | 002 |
| Nitrogen, Kjeldahl, total [TKN] [water] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrogen, Kjeldahl, total [TKN] [water] | monthly average | report only (mg/L) | all year | 002 |
| Toxicity [acute], Ceriodaphnia dubia | value | report only (toxic) | all year | 002 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | value | report only (toxic) | all year | 002 |
| Solids, total dissolved | daily maximum | ≤ 5500 mg/L | all year | 002 |
| Solids, total dissolved | monthly average | report only (mg/L) | all year | 002 |
| Day - max excursion time [min] | instantaneous maximum | ≤ 60 min | all year | 002 |
| Day - max excursion time [min] | value | ≤ 446 min | all year | 002 |
| Day - max excursion time [min] | daily maximum | ≤ 120 min | all year | 002 |
| Day - max excursion time [min] | monthly average | report only (min) | all year | 002 |
| Toxicity [chronic], Ceriodaphnia dubia | value | ≤ 1.6 toxic | all year | 003 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | value | ≤ 1.6 toxic | all year | 003 |
| Toxicity [chronic], Ceriodaphnia dubia | value | ≤ 1.6 toxic | all year | 007 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | value | ≤ 1.6 toxic | all year | 007 |
| Flow | daily maximum | report only (MGD) | all year | 009 |
| Flow | monthly average | report only (MGD) | all year | 009 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | report only (mg/L) | all year | 010 |
| Oxygen demand, chem. [high level] [COD] | quarterly average | report only (mg/L) | all year | 010 |
| pH | minimum | report only (SU) | all year | 010 |
| pH | maximum | report only (SU) | all year | 010 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 010 |
| Solids, total suspended | quarterly average | report only (mg/L) | all year | 010 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | report only (mg/L) | all year | 010 |
| Oil and grease [soxhlet extr.] tot. | quarterly average | report only (mg/L) | all year | 010 |
| Flow | daily maximum | report only (MGD) | all year | 010 |
| Flow | quarterly average | report only (MGD) | all year | 010 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | report only (mg/L) | all year | 011 |
| Oxygen demand, chem. [high level] [COD] | quarterly average | report only (mg/L) | all year | 011 |
| pH | minimum | report only (SU) | all year | 011 |
| pH | maximum | report only (SU) | all year | 011 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 011 |
| Solids, total suspended | quarterly average | report only (mg/L) | all year | 011 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | report only (mg/L) | all year | 011 |
| Oil and grease [soxhlet extr.] tot. | quarterly average | report only (mg/L) | all year | 011 |
| Flow | daily maximum | report only (MGD) | all year | 011 |
| Flow | quarterly average | report only (MGD) | all year | 011 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | report only (mg/L) | all year | 012 |
| Oxygen demand, chem. [high level] [COD] | quarterly average | report only (mg/L) | all year | 012 |
| pH | minimum | report only (SU) | all year | 012 |
| pH | maximum | report only (SU) | all year | 012 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 012 |
| Solids, total suspended | quarterly average | report only (mg/L) | all year | 012 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | report only (mg/L) | all year | 012 |
| Oil and grease [soxhlet extr.] tot. | quarterly average | report only (mg/L) | all year | 012 |
| Flow | daily maximum | report only (MGD) | all year | 012 |
| Flow | quarterly average | report only (MGD) | all year | 012 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | report only (mg/L) | all year | 014 |
| Oxygen demand, chem. [high level] [COD] | quarterly average | report only (mg/L) | all year | 014 |
| pH | minimum | report only (SU) | all year | 014 |
| pH | maximum | report only (SU) | all year | 014 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 014 |
| Solids, total suspended | quarterly average | report only (mg/L) | all year | 014 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | report only (mg/L) | all year | 014 |
| Oil and grease [soxhlet extr.] tot. | quarterly average | report only (mg/L) | all year | 014 |
| Flow | daily maximum | report only (MGD) | all year | 014 |
| Flow | quarterly average | report only (MGD) | all year | 014 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | report only (mg/L) | all year | 015 |
| Oxygen demand, chem. [high level] [COD] | quarterly average | report only (mg/L) | all year | 015 |
| pH | minimum | report only (SU) | all year | 015 |
| pH | maximum | report only (SU) | all year | 015 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 015 |
| Solids, total suspended | quarterly average | report only (mg/L) | all year | 015 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | report only (mg/L) | all year | 015 |
| Oil and grease [soxhlet extr.] tot. | quarterly average | report only (mg/L) | all year | 015 |
| Flow | daily maximum | report only (MGD) | all year | 015 |
| Flow | quarterly average | report only (MGD) | all year | 015 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 016 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 016 |
| pH | minimum | ≥ 6 SU | all year | 016 |
| pH | maximum | ≤ 9 SU | all year | 016 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 016 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 016 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | ≤ 15 mg/L | all year | 016 |
| Oil and grease [soxhlet extr.] tot. | monthly average | ≤ 10 mg/L | all year | 016 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 016 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 016 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 016 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 016 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 016 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 016 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | 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 (gal/min) | all year | 016 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/min) | all year | 016 |
| Chlorine, total residual | daily maximum | ≤ 200 ug/L | all year | 016 |
| Chlorine, total residual | monthly average | ≤ 104 ug/L | all year | 016 |
| Nitrogen, Kjeldahl, total [TKN] [water] | daily maximum | report only (mg/L) | all year | 016 |
| Nitrogen, Kjeldahl, total [TKN] [water] | monthly average | report only (mg/L) | all year | 016 |
| Toxicity [acute], Ceriodaphnia dubia | value | report only (toxic) | all year | 016 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | value | report only (toxic) | all year | 016 |
| Flow | daily maximum | report only (MGD) | all year | 100 |
| Flow | monthly average | report only (MGD) | all year | 100 |
Cited limits by parameter: Missouri's rules and the federal ones.
Same industry: the 29 Electric Services permits in Missouri.
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