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Electric Services, major discharger, West Alton, Missouri. NPDES permit MO0000353 expired Mar 31, 2022; its limits still apply. Last 12 months: over a limit 2 times (last June 2026), 4 of 60 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| June 2026 | E. coli, 30-day geometric mean | 1252.9 | ≤ 126 #/100mL | 894% |
| June 2026 | E. coli, geometric mean | 2419.6 | ≤ 630 #/100mL | 284% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit | daily maximum | ≤ 78 deg F | Oct | 001 |
| Temperature, water deg. fahrenheit | daily maximum | ≤ 55 deg F | Dec | 001 |
| Temperature, water deg. fahrenheit | daily maximum | ≤ 71 deg F | Apr | 001 |
| Temperature, water deg. fahrenheit | daily maximum | ≤ 60 deg F | Mar | 001 |
| Temperature, water deg. fahrenheit | daily maximum | ≤ 91 deg F | Jul, Aug | 001 |
| Temperature, water deg. fahrenheit | daily maximum | ≤ 68 deg F | Nov | 001 |
| Temperature, water deg. fahrenheit | daily maximum | ≤ 81 deg F | May | 001 |
| Temperature, water deg. fahrenheit | daily maximum | ≤ 48 deg F | Jan, Feb | 001 |
| Temperature, water deg. fahrenheit | daily maximum | ≤ 89 deg F | Jun, Sep | 001 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | Oct | 001 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | Dec | 001 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | Apr | 001 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | Mar | 001 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | Jul, Aug | 001 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | Nov | 001 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | Jan, Feb | 001 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | Jun, Sep | 001 |
| Temp. diff. between up/down stream deg. F | daily maximum | ≤ 5 deg F | all year | 001 |
| Temp. diff. between up/down stream deg. F | monthly average | report only (deg F) | 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 |
| Chlorine, total residual | daily maximum | ≤ 200 ug/L | all year | 001 |
| Chlorine, free available | daily maximum | ≤ 500 ug/L | all year | 001 |
| Chlorine, free available | monthly average | ≤ 200 ug/L | all year | 001 |
| Toxicity [acute], Ceriodaphnia dubia | value | report only (toxic) | all year | 001 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | value | report only (toxic) | all year | 001 |
| Stream flow, estimated | daily maximum | report only (cfs) | all year | 001 |
| Stream flow, estimated | monthly average | report only (cfs) | all year | 001 |
| Flow, process wastewater | daily maximum | report only (cfs) | all year | 001 |
| Flow, process wastewater | monthly average | report only (cfs) | all year | 001 |
| Month excursion time [min] | annual total | ≤ 438 hr | all year | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 002 |
| pH | maximum | ≤ 9 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 |
| Solids, Total Suspended, Net Value | daily maximum | ≤ 100 mg/L | all year | 002 |
| Solids, Total Suspended, Net Value | monthly average | ≤ 30 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, 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 |
| Nitrogen, Kjeldahl, 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 |
| Cyanide, free [amenable to chlorination] | daily maximum | report only (ug/L) | all year | 002 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 002 |
| Fluoride | daily maximum | report only (mg/L) | all year | 002 |
| Arsenic, total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Iron, total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Selenium, total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Titanium, total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Boron, total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Molybdenum, total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (ug/L) | all year | 002 |
| Chloride | daily maximum | report only (mg/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 |
| Toxicity [chronic], Ceriodaphnia dubia | value | report only (toxic) | all year | 002 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | value | report only (toxic) | all year | 002 |
| Chlorides + Sulfates | daily maximum | report only (mg/L) | all year | 002 |
| pH | minimum | report only (SU) | all year | 003 |
| pH | maximum | report only (SU) | all year | 003 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 003 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | report only (mg/L) | all year | 003 |
| Nitrogen, 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 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 003 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 003 |
| Chloride | daily maximum | report only (mg/L) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| Chlorides + Sulfates | daily maximum | report only (mg/L) | all year | 003 |
| pH | minimum | ≥ 6.5 SU | all year | 006 |
| pH | maximum | ≤ 9 SU | all year | 006 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 006 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 006 |
| Solids, Total Suspended, Net Value | daily maximum | ≤ 100 mg/L | all year | 006 |
| Solids, Total Suspended, Net Value | monthly average | ≤ 30 mg/L | all year | 006 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | ≤ 15 mg/L | all year | 006 |
| Oil and grease [soxhlet extr.] tot. | monthly average | ≤ 10 mg/L | 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 |
| Nitrogen, Kjeldahl, 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 |
| Cyanide, free [amenable to chlorination] | daily maximum | report only (ug/L) | all year | 006 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 006 |
| Fluoride | daily maximum | report only (mg/L) | all year | 006 |
| Arsenic, total recoverable | daily maximum | report only (ug/L) | all year | 006 |
| Iron, total recoverable | daily maximum | report only (ug/L) | all year | 006 |
| Selenium, total recoverable | daily maximum | report only (ug/L) | all year | 006 |
| Titanium, total recoverable | daily maximum | report only (ug/L) | all year | 006 |
| Boron, total recoverable | daily maximum | report only (ug/L) | all year | 006 |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | all year | 006 |
| Molybdenum, total recoverable | daily maximum | report only (ug/L) | all year | 006 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (ug/L) | all year | 006 |
| Chloride | daily maximum | report only (mg/L) | all year | 006 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 006 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 006 |
| Toxicity [chronic], Ceriodaphnia dubia | value | report only (toxic) | all year | 006 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | value | report only (toxic) | all year | 006 |
| Chlorides + Sulfates | daily maximum | report only (mg/L) | all year | 006 |
| pH | minimum | report only (SU) | all year | 007 |
| pH | maximum | report only (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 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 007 |
| Nitrite + Nitrate total [as N] | daily maximum | ≤ 17 mg/L | all year | 007 |
| Nitrite + Nitrate total [as N] | monthly average | ≤ 4.4 mg/L | all year | 007 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 007 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 007 |
| Arsenic, total recoverable | daily maximum | ≤ 11 ug/L | all year | 007 |
| Arsenic, total recoverable | monthly average | ≤ 8 ug/L | all year | 007 |
| Selenium, total recoverable | daily maximum | ≤ 23 ug/L | all year | 007 |
| Selenium, total recoverable | monthly average | ≤ 12 ug/L | all year | 007 |
| Chloride | daily maximum | report only (mg/L) | all year | 007 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 007 |
| Mercury, total recoverable | daily maximum | ≤ 788 ng/L | all year | 007 |
| Mercury, total recoverable | monthly average | ≤ 356 ng/L | all year | 007 |
| Chlorides + Sulfates | daily maximum | report only (mg/L) | all year | 007 |
| pH | minimum | ≥ 6 SU | all year | 009 |
| pH | maximum | ≤ 9 SU | all year | 009 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 009 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 009 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 009 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 009 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | ≤ 15 mg/L | all year | 009 |
| Oil and grease [soxhlet extr.] tot. | monthly average | ≤ 10 mg/L | 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 |
| Nitrogen, Kjeldahl, 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 |
| Cyanide, free [amenable to chlorination] | daily maximum | report only (ug/L) | all year | 009 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 009 |
| Fluoride | daily maximum | report only (mg/L) | all year | 009 |
| Arsenic, total recoverable | daily maximum | report only (ug/L) | all year | 009 |
| Iron, total recoverable | daily maximum | report only (ug/L) | all year | 009 |
| Selenium, total recoverable | daily maximum | report only (ug/L) | all year | 009 |
| Titanium, total recoverable | daily maximum | report only (ug/L) | all year | 009 |
| Boron, total recoverable | daily maximum | report only (ug/L) | all year | 009 |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | all year | 009 |
| Molybdenum, total recoverable | daily maximum | report only (ug/L) | all year | 009 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (ug/L) | all year | 009 |
| Chloride | daily maximum | report only (mg/L) | all year | 009 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 009 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 009 |
| Toxicity [chronic], Ceriodaphnia dubia | daily maximum | report only (toxic) | all year | 009 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | daily maximum | report only (toxic) | all year | 009 |
| Chlorides + Sulfates | daily maximum | report only (mg/L) | all year | 009 |
| 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 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | report only (mg/L) | all year | 010 |
| Nitrogen, 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 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 010 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 010 |
| Chloride | daily maximum | report only (mg/L) | all year | 010 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 010 |
| Chlorides + Sulfates | daily maximum | report only (mg/L) | all year | 010 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 45 mg/L | all year | 09A |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | 09A |
| pH | minimum | ≥ 6 SU | all year | 09A |
| pH | maximum | ≤ 9 SU | all year | 09A |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 09A |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 09A |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 09A |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 09A |
| E. coli | geometric mean | ≤ 630 #/100mL | Apr–Dec | 09A |
| E. coli | 30-day geometric mean | ≤ 126 #/100mL | Apr–Dec | 09A |
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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