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Electric Services, major discharger, Clifton Hill, Missouri. NPDES permit MO0097675, in force until Oct 31, 2027. Last 12 months: over a limit once (last July 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit |
|---|---|---|---|
| July 2026 | pH, maximum | 9.46 | ≤ 9 SU |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 001 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | ≤ 20 mg/L | all year | 001 |
| Oil and grease [soxhlet extr.] tot. | monthly average | ≤ 15 mg/L | all year | 001 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 001 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year | 001 |
| Chloride | daily maximum | report only (mg/L) | all year | 001 |
| Chloride | 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 | monthly average | report only (MGD) | all year | 001 |
| Chlorides + Sulfates | daily maximum | report only (mg/L) | all year | 001 |
| Chlorides + Sulfates | monthly average | report only (mg/L) | all year | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | 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 |
| pH | minimum | ≥ 6.5 SU | all year | 003 |
| pH | maximum | ≤ 9 SU | all year | 003 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 003 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 003 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 003 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 003 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | ≤ 20 mg/L | all year | 003 |
| Oil and grease [soxhlet extr.] tot. | monthly average | ≤ 15 mg/L | 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 | monthly average | report only (MGD) | all year | 003 |
| pH | minimum | ≥ 6.5 SU | all year | 004 |
| pH | maximum | ≤ 9 SU | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 004 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 004 |
| pH | minimum | ≥ 6.5 SU | all year | 005 |
| pH | maximum | ≤ 9 SU | all year | 005 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 005 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 005 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | ≤ 20 mg/L | all year | 005 |
| Oil and grease [soxhlet extr.] tot. | monthly average | ≤ 15 mg/L | all year | 005 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.5 mg/L | Oct | 005 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.7 mg/L | Jul | 005 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.7 mg/L | Apr, May, Jun, Aug, Sep | 005 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.5 mg/L | Jan, Feb, Mar, Nov, Dec | 005 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.6 mg/L | Oct | 005 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.3 mg/L | Jul | 005 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.4 mg/L | Apr, May, Jun, Aug, Sep | 005 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.8 mg/L | Jan, Feb, Mar, Nov, Dec | 005 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 005 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 005 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 005 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 005 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 005 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year | 005 |
| Iron, total recoverable | daily maximum | report only (ug/L) | all year | 005 |
| Iron, total recoverable | monthly average | report only (ug/L) | all year | 005 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 005 |
| Copper, total recoverable | monthly average | report only (ug/L) | all year | 005 |
| Chloride | daily maximum | report only (mg/L) | all year | 005 |
| Chloride | monthly average | report only (mg/L) | all year | 005 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 005 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 005 |
| Chlorine, total residual | daily maximum | ≤ 18.1 ug/L | all year | 005 |
| Chlorine, total residual | monthly average | ≤ 9 ug/L | all year | 005 |
| Nitrogen, Kjeldahl, total [TKN] [water] | daily maximum | report only (mg/L) | all year | 005 |
| Nitrogen, Kjeldahl, total [TKN] [water] | monthly average | report only (mg/L) | all year | 005 |
| Toxicity [chronic], Ceriodaphnia dubia | value | ≤ 1.6 toxic | all year | 005 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | value | ≤ 1.6 toxic | all year | 005 |
| Chlorides + Sulfates | daily maximum | ≤ 1000 mg/L | all year | 005 |
| Chlorides + Sulfates | monthly average | ≤ 1000 mg/L | all year | 005 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | report only (mg/L) | all year | 007 |
| pH | minimum | ≥ 6.5 SU | all year | 007 |
| pH | maximum | ≤ 9 SU | all year | 007 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 007 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | report only (mg/L) | all year | 007 |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | all year | 007 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 007 |
| pH | minimum | ≥ 6.5 SU | all year | 008 |
| pH | maximum | ≤ 9 SU | all year | 008 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 008 |
| Solids, total suspended | monthly average | ≤ 50 mg/L | all year | 008 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | ≤ 20 mg/L | all year | 008 |
| Oil and grease [soxhlet extr.] tot. | monthly average | ≤ 15 mg/L | all year | 008 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 008 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 008 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 008 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 008 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 008 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 008 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 008 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year | 008 |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | all year | 008 |
| Aluminum, total recoverable | monthly average | report only (ug/L) | all year | 008 |
| Chloride | daily maximum | report only (mg/L) | all year | 008 |
| Chloride | monthly average | report only (mg/L) | all year | 008 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 008 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 008 |
| Nitrogen, Kjeldahl, total [TKN] [water] | daily maximum | report only (mg/L) | all year | 008 |
| Nitrogen, Kjeldahl, total [TKN] [water] | monthly average | report only (mg/L) | all year | 008 |
| Toxicity [chronic], Ceriodaphnia dubia | value | ≤ 1.6 toxic | all year | 008 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | value | ≤ 1.6 toxic | all year | 008 |
| Chlorides + Sulfates | daily maximum | report only (mg/L) | all year | 008 |
| Chlorides + Sulfates | monthly average | report only (mg/L) | all year | 008 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | report only (mg/L) | all year | 009 |
| pH | minimum | ≥ 6.5 SU | all year | 009 |
| pH | maximum | ≤ 9 SU | all year | 009 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 009 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | report only (mg/L) | all year | 009 |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | all year | 009 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 009 |
| pH | minimum | ≥ 6.5 SU | all year | 011 |
| pH | maximum | ≤ 9 SU | all year | 011 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 011 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 011 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | ≤ 20 mg/L | all year | 011 |
| Oil and grease [soxhlet extr.] tot. | monthly average | ≤ 15 mg/L | all year | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 011 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 011 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 011 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 011 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 011 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 011 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 011 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year | 011 |
| Iron, total recoverable | daily maximum | report only (ug/L) | all year | 011 |
| Iron, total recoverable | monthly average | report only (ug/L) | all year | 011 |
| Chloride | daily maximum | report only (mg/L) | all year | 011 |
| Chloride | monthly average | report only (mg/L) | all year | 011 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 011 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 011 |
| Chlorine, total residual | daily maximum | report only (ug/L) | all year | 011 |
| Chlorine, total residual | monthly average | report only (ug/L) | all year | 011 |
| Nitrogen, Kjeldahl, total [TKN] [water] | daily maximum | report only (mg/L) | all year | 011 |
| Nitrogen, Kjeldahl, total [TKN] [water] | monthly average | report only (mg/L) | all year | 011 |
| Toxicity [chronic], Ceriodaphnia dubia | value | ≤ 1.6 toxic | all year | 011 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | daily maximum | ≤ 1.6 toxic | all year | 011 |
| Chlorides + Sulfates | daily maximum | report only (mg/L) | all year | 011 |
| Chlorides + Sulfates | monthly average | report only (mg/L) | all year | 011 |
| pH | minimum | ≥ 6 SU | all year | 013 |
| pH | maximum | ≤ 9 SU | all year | 013 |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | all year | 013 |
| Solids, total suspended | monthly average | ≤ 20 mg/L | all year | 013 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 013 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 013 |
| E. coli | daily maximum | ≤ 630 #/100mL | Apr–Oct | 013 |
| E. coli | 30-day geometric mean | ≤ 126 #/100mL | Apr–Oct | 013 |
| BOD, 5-day, total | daily maximum | ≤ 30 mg/L | all year | 013 |
| BOD, 5-day, total | monthly average | ≤ 20 mg/L | all year | 013 |
| pH | minimum | ≥ 6.5 SU | all year | 014 |
| pH | maximum | ≤ 9 SU | all year | 014 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 014 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 014 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 014 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 014 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | ≤ 20 mg/L | all year | 014 |
| Oil and grease [soxhlet extr.] tot. | monthly average | ≤ 15 mg/L | all year | 014 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 014 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 014 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | report only (mg/L) | all year | 016 |
| pH | minimum | ≥ 6.5 SU | all year | 016 |
| pH | maximum | ≤ 9 SU | all year | 016 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 016 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | report only (mg/L) | all year | 016 |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | all year | 016 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 016 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | report only (mg/L) | all year | 017 |
| pH | minimum | ≥ 6.5 SU | all year | 017 |
| pH | maximum | ≤ 9 SU | all year | 017 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 017 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | report only (mg/L) | all year | 017 |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | all year | 017 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 017 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | report only (mg/L) | all year | 018 |
| pH | minimum | ≥ 6.5 SU | all year | 018 |
| pH | maximum | ≤ 9 SU | all year | 018 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 018 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | report only (mg/L) | all year | 018 |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | all year | 018 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 018 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | report only (mg/L) | all year | 019 |
| pH | minimum | ≥ 6.5 SU | all year | 019 |
| pH | maximum | ≤ 9 SU | all year | 019 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 019 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | report only (mg/L) | all year | 019 |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | all year | 019 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 019 |
| pH | minimum | ≥ 6.5 SU | all year | 01A |
| pH | maximum | ≤ 9 SU | all year | 01A |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 01A |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 01A |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 01A |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 01A |
| Oil and grease [soxhlet extr.] tot. | daily maximum | ≤ 20 mg/L | all year | 01A |
| Oil and grease [soxhlet extr.] tot. | monthly average | ≤ 15 mg/L | all year | 01A |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 01A |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year | 01A |
| Chloride | daily maximum | report only (mg/L) | all year | 01A |
| Chloride | monthly average | report only (mg/L) | all year | 01A |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 01A |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 01A |
| Chlorides + Sulfates | daily maximum | report only (mg/L) | all year | 01A |
| Chlorides + Sulfates | monthly average | report only (mg/L) | all year | 01A |
| Temperature, water deg. fahrenheit | daily maximum | ≤ 90 deg F | all year | 020 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 020 |
| Iron, total recoverable | daily maximum | ≤ 1000 ug/L | all year | BWW |
| Iron, total recoverable | monthly average | ≤ 1000 ug/L | all year | BWW |
| Boron, total recoverable | daily maximum | ≤ 3377 ug/L | all year | BWW |
| Boron, total recoverable | monthly average | ≤ 1683 ug/L | all year | BWW |
| Copper, total recoverable | daily maximum | ≤ 1000 ug/L | all year | BWW |
| Copper, total recoverable | monthly average | ≤ 1000 ug/L | all year | BWW |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | BWW |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | BWW |
| Toxicity [acute], Ceriodaphnia dubia | value | ≤ 1 toxic | all year | BWW |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | value | ≤ 1 toxic | all year | BWW |
| pH | minimum | report only (SU) | all year | INA |
| pH | maximum | report only (SU) | all year | INA |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | INA |
| Solids, total suspended | monthly average | report only (mg/L) | all year | INA |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | all year | INA |
| Aluminum, total recoverable | monthly average | report only (ug/L) | all year | INA |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | INA |
| Copper, total recoverable | monthly average | report only (ug/L) | all year | INA |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | INA |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | INA |
Cited limits by parameter: Missouri's rules and the federal ones.
Same industry: the 29 Electric Services permits in Missouri.
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On EPA ECHO: Facility report · DMR history
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