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Electric Services, major discharger, Union, Kentucky. NPDES permit KY0040444, in force until Sep 30, 2030. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 001 |
| Temperature, water deg. fahrenheit | daily maximum | ≤ 110 deg F | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| Oil & Grease | monthly average | ≤ 11.7 mg/L | all year | 001 |
| Oil & Grease | daily maximum | ≤ 15.6 mg/L | all year | 001 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year | 001 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 001 |
| Copper, total recoverable | monthly average | ≤ .052 mg/L | all year | 001 |
| Copper, total recoverable | daily maximum | ≤ .052 mg/L | 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 (MGD) | all year | 001 |
| Suspended Solids, Total | monthly average | ≤ 30 mg/L | all year | 001 |
| Suspended Solids, Total | daily maximum | ≤ 80.1 mg/L | all year | 001 |
| Toxicity, Acute | daily maximum | ≤ 1 tox acute | all year | 001 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 003 |
| Temperature, water deg. fahrenheit | daily maximum | ≤ 110 deg F | all year | 003 |
| pH | minimum | ≥ 6 SU | all year | 003 |
| pH | daily maximum | ≤ 9 SU | all year | 003 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year | 003 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 003 |
| Iron, total recoverable | monthly average | report only (mg/L) | all year | 003 |
| Iron, total recoverable | daily maximum | report only (mg/L) | all year | 003 |
| Copper, total recoverable | monthly average | report only (mg/L) | all year | 003 |
| Copper, total recoverable | daily maximum | report only (mg/L) | all year | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | 007 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 45 mg/L | all year | 007 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 007 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 007 |
| Chlorine, total residual | minimum | ≥ .5 mg/L | all year | 007 |
| Zinc, total recoverable | monthly average | ≤ 1 mg/L | all year | 010 |
| Zinc, total recoverable | daily maximum | ≤ 1 mg/L | all year | 010 |
| Chromium, total recoverable | monthly average | ≤ .2 mg/L | all year | 010 |
| Chromium, total recoverable | daily maximum | ≤ .2 mg/L | all year | 010 |
| Oxidants, total residual | monthly average | report only (mg/L) | all year | 010 |
| Oxidants, total residual | daily maximum | ≤ .2 mg/L | all year | 010 |
| Priority Pollutants | monthly average | ≤ 0 mg/L | all year | 010 |
| Priority Pollutants | daily maximum | ≤ 0 mg/L | all year | 010 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 010 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 010 |
| Chlorine, free available | monthly average | ≤ .2 mg/L | all year | 010 |
| Chlorine, free available | daily maximum | ≤ .5 mg/L | all year | 010 |
| Duration of Oxidant Addition | daily maximum | ≤ 120 min/d | all year | 010 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 011 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 011 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year | 011 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 011 |
| Iron, total recoverable | monthly average | report only (mg/L) | all year | 011 |
| Iron, total recoverable | daily maximum | report only (mg/L) | all year | 011 |
| Copper, total recoverable | monthly average | report only (mg/L) | all year | 011 |
| Copper, total recoverable | daily maximum | report only (mg/L) | all year | 011 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 011 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 011 |
| Cooling Water Intake Inspection | daily maximum | report only (pass=0;fail=1) | all year | 011 |
Cited limits by parameter: Kentucky's rules and the federal ones.
Same industry: the 29 Electric Services permits in Kentucky.
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