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Electric Services, major discharger, Weston, Missouri. NPDES permit MO0082996, in force until Mar 31, 2028. 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 |
| 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 |
| 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 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (cfs) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (cfs) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (ft3/d) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (ft3/d) | all year | 001 |
| 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 | ≤ 30 mg/L | all year | 003 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | ≤ 15 mg/L | all year | 003 |
| Oil and grease [soxhlet extr.] tot. | monthly average | ≤ 10 mg/L | all year | 003 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 003 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 003 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 003 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 003 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 003 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 003 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 003 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 003 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year | 003 |
| Aluminum, total recoverable | daily maximum | ≤ 750 ug/L | all year | 003 |
| Aluminum, total recoverable | monthly average | ≤ 374 ug/L | all year | 003 |
| Chloride | daily maximum | report only (mg/L) | all year | 003 |
| Chloride | monthly average | report only (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 |
| Nitrogen, Kjeldahl, total [TKN] [water] | daily maximum | report only (mg/L) | all year | 003 |
| Nitrogen, Kjeldahl, total [TKN] [water] | monthly average | report only (mg/L) | all year | 003 |
| Toxicity [acute], Ceriodaphnia dubia | value | report only (toxic) | all year | 003 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | value | report only (toxic) | all year | 003 |
| Chlorides + Sulfates | daily maximum | report only (mg/L) | all year | 003 |
| Chlorides + Sulfates | monthly average | report only (mg/L) | all year | 003 |
| pH | minimum | ≥ 6.5 SU | all year | 010 |
| pH | maximum | ≤ 9 SU | all year | 010 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 010 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 010 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | ≤ 20 mg/L | all year | 010 |
| Oil and grease [soxhlet extr.] tot. | monthly average | ≤ 15 mg/L | all year | 010 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 010 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 010 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 010 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 010 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 010 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 010 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 010 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year | 010 |
| Magnesium, total recoverable | daily maximum | report only (ug/L) | all year | 010 |
| Magnesium, total recoverable | monthly average | report only (ug/L) | all year | 010 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 010 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year | 010 |
| Selenium, total recoverable | daily maximum | report only (ug/L) | all year | 010 |
| Selenium, total recoverable | monthly average | report only (ug/L) | all year | 010 |
| Boron, total recoverable | daily maximum | report only (ug/L) | all year | 010 |
| Boron, total recoverable | monthly average | report only (ug/L) | all year | 010 |
| Manganese, total [as Mn] | daily maximum | report only (ug/L) | all year | 010 |
| Manganese, total [as Mn] | monthly average | report only (ug/L) | all year | 010 |
| Molybdenum, total [as Mo] | daily maximum | report only (ug/L) | all year | 010 |
| Molybdenum, total [as Mo] | monthly average | report only (ug/L) | all year | 010 |
| Nickel, total [as Ni] | daily maximum | report only (ug/L) | all year | 010 |
| Nickel, total [as Ni] | monthly average | report only (ug/L) | all year | 010 |
| Aluminum, total [as Al] | daily maximum | report only (ug/L) | all year | 010 |
| Aluminum, total [as Al] | monthly average | report only (ug/L) | all year | 010 |
| Chloride | daily maximum | report only (mg/L) | all year | 010 |
| Chloride | monthly average | report only (mg/L) | all year | 010 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 010 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 010 |
| Nitrogen, Kjeldahl, total [TKN] [water] | daily maximum | report only (mg/L) | all year | 010 |
| Nitrogen, Kjeldahl, total [TKN] [water] | monthly average | report only (mg/L) | all year | 010 |
| Toxicity [acute], Ceriodaphnia dubia | value | report only (toxic) | all year | 010 |
| Toxicity [chronic], Ceriodaphnia dubia | value | report only (toxic) | all year | 010 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | value | report only (toxic) | all year | 010 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | value | report only (toxic) | all year | 010 |
| Chlorides + Sulfates | daily maximum | report only (mg/L) | all year | 010 |
| Chlorides + Sulfates | monthly average | report only (mg/L) | all year | 010 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | 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 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | report only (mg/L) | all year | 011 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 011 |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | all year | 011 |
| Chloride | daily maximum | report only (mg/L) | all year | 011 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 011 |
| Surfactants [linear alkylate sulfonate] | daily maximum | report only (mg/L) | all year | 011 |
| Chlorides + Sulfates | daily maximum | report only (mg/L) | all year | 011 |
| Parameter | New limit | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit, daily maximum | 90 deg F | new | 66.18 deg F (11 values) | 0.735× |
Cited limits by parameter: Missouri's rules and the federal ones.
Same industry: the 29 Electric Services permits in Missouri.
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