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Electric Services, major discharger, Louisville, Kentucky. NPDES permit KY0003221, in force until Sep 30, 2028. 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 | maximum | ≤ 9 SU | all year | 001 |
| Oxidants, total residual | monthly average | report only (mg/L) | all year | 001 |
| Oxidants, total residual | daily maximum | ≤ .2 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 |
| Chlorine, total residual | monthly average | report only (mg/L) | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ .019 mg/L | all year | 001 |
| Chlorine, free available | monthly average | ≤ .2 mg/L | all year | 001 |
| Chlorine, free available | daily maximum | ≤ .5 mg/L | all year | 001 |
| Duration of Oxidant Addition | daily maximum | ≤ 120 min/d | all year | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 002 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 97.9 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 97.5 mg/L | all year | 002 |
| Oil & Grease | monthly average | ≤ 14.7 mg/L | all year | 002 |
| Oil & Grease | monthly average | ≤ 14.6 mg/L | all year | 002 |
| Oil & Grease | daily maximum | ≤ 19.6 mg/L | all year | 002 |
| Oil & Grease | daily maximum | ≤ 19.6 mg/L | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| pH | minimum | ≥ 6 SU | all year | 002A |
| pH | maximum | ≤ 9 SU | all year | 002A |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 002A |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 002A |
| Solids, total suspended | daily maximum | ≤ 97.9 mg/L | all year | 002A |
| Solids, total suspended | daily maximum | ≤ 97.5 mg/L | all year | 002A |
| Oil & Grease | monthly average | ≤ 14.7 mg/L | all year | 002A |
| Oil & Grease | monthly average | ≤ 14.6 mg/L | all year | 002A |
| Oil & Grease | daily maximum | ≤ 19.6 mg/L | all year | 002A |
| Oil & Grease | daily maximum | ≤ 19.6 mg/L | all year | 002A |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year | 002A |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 002A |
| Iron, total recoverable | monthly average | report only (mg/L) | all year | 002A |
| Iron, total recoverable | daily maximum | report only (mg/L) | all year | 002A |
| Selenium, total recoverable | monthly average | report only (mg/L) | all year | 002A |
| Selenium, total recoverable | daily maximum | report only (mg/L) | all year | 002A |
| Thallium, total recoverable | monthly average | report only (mg/L) | all year | 002A |
| Thallium, total recoverable | daily maximum | report only (mg/L) | all year | 002A |
| Cadmium, total recoverable | monthly average | report only (mg/L) | all year | 002A |
| Cadmium, total recoverable | daily maximum | report only (mg/L) | all year | 002A |
| Copper, total recoverable | monthly average | report only (mg/L) | all year | 002A |
| Copper, total recoverable | daily maximum | report only (mg/L) | all year | 002A |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 002A |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 002A |
| Toxicity, final conc toxicity units | maximum | ≤ 1 tox acute | all year | 002A |
| Zinc, total recoverable | monthly average | ≤ 1 mg/L | all year | 003 |
| Zinc, total recoverable | daily maximum | ≤ 1 mg/L | all year | 003 |
| Chromium, total recoverable | monthly average | ≤ .2 mg/L | all year | 003 |
| Chromium, total recoverable | daily maximum | ≤ .2 mg/L | all year | 003 |
| Oxidants, total residual | monthly average | report only (mg/L) | all year | 003 |
| Oxidants, total residual | daily maximum | ≤ .2 mg/L | all year | 003 |
| Priority Pollutants | daily maximum | ≤ 0 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 |
| Chlorine, free available | monthly average | ≤ .2 mg/L | all year | 003 |
| Chlorine, free available | daily maximum | ≤ .5 mg/L | all year | 003 |
| Duration of Oxidant Addition | daily maximum | ≤ 120 min/d | all year | 003 |
| Zinc, total recoverable | monthly average | ≤ 1 mg/L | all year | 004 |
| Zinc, total recoverable | daily maximum | ≤ 1 mg/L | all year | 004 |
| Chromium, total recoverable | monthly average | ≤ .2 mg/L | all year | 004 |
| Chromium, total recoverable | daily maximum | ≤ .2 mg/L | all year | 004 |
| Oxidants, total residual | monthly average | report only (mg/L) | all year | 004 |
| Oxidants, total residual | daily maximum | ≤ .2 mg/L | all year | 004 |
| Priority Pollutants | daily maximum | ≤ 0 mg/L | all year | 004 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 004 |
| Chlorine, free available | monthly average | ≤ .2 mg/L | all year | 004 |
| Chlorine, free available | daily maximum | ≤ .5 mg/L | all year | 004 |
| Duration of Oxidant Addition | daily maximum | ≤ 120 min/d | all year | 004 |
| Zinc, total recoverable | monthly average | ≤ 1 mg/L | all year | 005 |
| Zinc, total recoverable | daily maximum | ≤ 1 mg/L | all year | 005 |
| Chromium, total recoverable | monthly average | ≤ .2 mg/L | all year | 005 |
| Chromium, total recoverable | daily maximum | ≤ .2 mg/L | all year | 005 |
| Oxidants, total residual | monthly average | report only (mg/L) | all year | 005 |
| Oxidants, total residual | daily maximum | ≤ .2 mg/L | all year | 005 |
| Priority Pollutants | daily maximum | ≤ 0 mg/L | all year | 005 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 005 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 005 |
| Chlorine, free available | monthly average | ≤ .2 mg/L | all year | 005 |
| Chlorine, free available | daily maximum | ≤ .5 mg/L | all year | 005 |
| Duration of Oxidant Addition | daily maximum | ≤ 120 min/d | all year | 005 |
| Copper, total [as Cu] | monthly average | ≤ 1 mg/L | all year | 006 |
| Copper, total [as Cu] | daily maximum | ≤ 1 mg/L | all year | 006 |
| Iron, total [as Fe] | monthly average | ≤ 1 mg/L | all year | 006 |
| Iron, total [as Fe] | daily maximum | ≤ 1 mg/L | all year | 006 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 006 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 006 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 009 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 009 |
| Arsenic, total recoverable | monthly average | report only (mg/L) | all year | 009 |
| Arsenic, total recoverable | daily maximum | report only (mg/L) | all year | 009 |
| Iron, total recoverable | monthly average | report only (mg/L) | all year | 009 |
| Iron, total recoverable | daily maximum | report only (mg/L) | all year | 009 |
| Selenium, total recoverable | monthly average | report only (mg/L) | all year | 009 |
| Selenium, total recoverable | daily maximum | report only (mg/L) | all year | 009 |
| Thallium, total recoverable | monthly average | report only (mg/L) | all year | 009 |
| Thallium, total recoverable | daily maximum | report only (mg/L) | all year | 009 |
| Beryllium, total recoverable [as Be] | monthly average | report only (mg/L) | all year | 009 |
| Beryllium, total recoverable [as Be] | daily maximum | report only (mg/L) | all year | 009 |
| Nickel, total recoverable | monthly average | report only (mg/L) | all year | 009 |
| Nickel, total recoverable | daily maximum | report only (mg/L) | all year | 009 |
| Silver total recoverable | monthly average | report only (mg/L) | all year | 009 |
| Silver total recoverable | daily maximum | report only (mg/L) | all year | 009 |
| Zinc, total recoverable | monthly average | report only (mg/L) | all year | 009 |
| Zinc, total recoverable | daily maximum | report only (mg/L) | all year | 009 |
| Cadmium, total recoverable | monthly average | report only (mg/L) | all year | 009 |
| Cadmium, total recoverable | daily maximum | report only (mg/L) | all year | 009 |
| Lead, total recoverable | monthly average | report only (mg/L) | all year | 009 |
| Lead, total recoverable | daily maximum | report only (mg/L) | all year | 009 |
| Chromium, total recoverable | monthly average | report only (mg/L) | all year | 009 |
| Chromium, total recoverable | daily maximum | report only (mg/L) | all year | 009 |
| Copper, total recoverable | monthly average | report only (mg/L) | all year | 009 |
| Copper, total recoverable | daily maximum | report only (mg/L) | all year | 009 |
| Antimony, total recoverable | monthly average | report only (mg/L) | all year | 009 |
| Antimony, total recoverable | daily maximum | report only (mg/L) | all year | 009 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 009 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 009 |
| Mercury, total recoverable | monthly average | report only (mg/L) | all year | 009 |
| Mercury, total recoverable | daily maximum | report only (mg/L) | all year | 009 |
| Cooling Water Intake Inspection | value | report only (pass=0;fail=1) | all year | 009 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 012 |
| Solids, total suspended | daily maximum | ≤ 80 mg/L | all year | 012 |
| Oil & Grease | monthly average | ≤ 10.1 mg/L | all year | 012 |
| Oil & Grease | daily maximum | ≤ 12.7 mg/L | all year | 012 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 012 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 012 |
| pH | minimum | ≥ 6 SU | all year | 013 |
| pH | maximum | ≤ 9 SU | all year | 013 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 013 |
| Solids, total suspended | daily maximum | ≤ 60 mg/L | all year | 013 |
| Oil & Grease | monthly average | ≤ 10 mg/L | all year | 013 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 013 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 013 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 013 |
| pH | minimum | report only (SU) | all year | 015 |
| pH | maximum | report only (SU) | all year | 015 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 015 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 015 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 015 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 015 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 023 |
| Temperature, water deg. fahrenheit | daily maximum | ≤ 115 deg F | all year | 023 |
| pH | minimum | ≥ 6 SU | all year | 023 |
| pH | maximum | ≤ 9 SU | all year | 023 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year | 023 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 023 |
| Iron, total recoverable | monthly average | report only (mg/L) | all year | 023 |
| Iron, total recoverable | daily maximum | report only (mg/L) | all year | 023 |
| Copper, total recoverable | monthly average | ≤ .514 mg/L | all year | 023 |
| Copper, total recoverable | daily maximum | ≤ .514 mg/L | all year | 023 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 023 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 023 |
| Nitrite + Nitrate total [as N] | monthly average | ≤ 3 mg/L | all year | 024 |
| Nitrite + Nitrate total [as N] | daily maximum | ≤ 4 mg/L | all year | 024 |
| Arsenic, total recoverable | monthly average | ≤ 8 ug/L | all year | 024 |
| Arsenic, total recoverable | daily maximum | ≤ 18 ug/L | all year | 024 |
| Selenium, total recoverable | monthly average | ≤ 29 ug/L | all year | 024 |
| Selenium, total recoverable | daily maximum | ≤ 70 ug/L | all year | 024 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 024 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 024 |
| Mercury, total recoverable | monthly average | ≤ 34 ng/L | all year | 024 |
| Mercury, total recoverable | daily maximum | ≤ 103 ng/L | all year | 024 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 025 |
| Temperature, water deg. fahrenheit | daily maximum | ≤ 110 deg F | all year | 025 |
| pH | minimum | ≥ 6 SU | all year | 025 |
| pH | maximum | ≤ 9 SU | all year | 025 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year | 025 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 025 |
| Iron, total recoverable | monthly average | report only (mg/L) | all year | 025 |
| Iron, total recoverable | daily maximum | report only (mg/L) | all year | 025 |
| Selenium, total recoverable | monthly average | ≤ 2.11 mg/L | all year | 025 |
| Selenium, total recoverable | daily maximum | report only (mg/L) | all year | 025 |
| Thallium, total recoverable | monthly average | report only (mg/L) | all year | 025 |
| Thallium, total recoverable | daily maximum | report only (mg/L) | all year | 025 |
| Cadmium, total recoverable | monthly average | report only (mg/L) | all year | 025 |
| Cadmium, total recoverable | daily maximum | report only (mg/L) | all year | 025 |
| Copper, total recoverable | monthly average | ≤ .742 mg/L | all year | 025 |
| Copper, total recoverable | daily maximum | ≤ .742 mg/L | all year | 025 |
| Selenium, dry weight | maximum | ≤ 8.6 mg/L | all year | 025 |
| Selenium, dry weight | daily maximum | ≤ 8.6 mg/L | all year | 025 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 025 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 025 |
| Toxicity, final conc toxicity units | daily maximum | ≤ 12.21 tox acute | all year | 025 |
| Zinc, total recoverable | monthly average | ≤ 1 mg/L | all year | 050 |
| Zinc, total recoverable | daily maximum | ≤ 1 mg/L | all year | 050 |
| Chromium, total recoverable | monthly average | ≤ .2 mg/L | all year | 050 |
| Chromium, total recoverable | daily maximum | ≤ .2 mg/L | all year | 050 |
| Oxidants, total residual | monthly average | report only (mg/L) | all year | 050 |
| Oxidants, total residual | daily maximum | ≤ .2 mg/L | all year | 050 |
| Priority Pollutants | daily maximum | ≤ 0 mg/L | all year | 050 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 050 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 050 |
| Chlorine, free available | monthly average | ≤ .2 mg/L | all year | 050 |
| Chlorine, free available | daily maximum | ≤ .5 mg/L | all year | 050 |
| Duration of Oxidant Addition | daily maximum | ≤ 120 min/d | all year | 050 |
Cited limits by parameter: Kentucky's rules and the federal ones.
Same industry: the 29 Electric Services permits in Kentucky.
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