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Electric Services, major discharger, Hartsville, South Carolina. NPDES permit SC0002925 expired Apr 30, 2011; its limits still apply. 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 | ≤ 100 deg F | Apr, Nov | 001 |
| Temperature, water deg. fahrenheit | daily maximum | ≤ 90 deg F | Jan, Feb, Dec | 001 |
| Temperature, water deg. fahrenheit | daily maximum | ≤ 108 deg F | Oct | 001 |
| Temperature, water deg. fahrenheit | daily maximum | ≤ 111.2 deg F | Jun–Sep | 001 |
| Temperature, water deg. fahrenheit | daily maximum | ≤ 106 deg F | May | 001 |
| Temperature, water deg. fahrenheit | daily maximum | ≤ 92 deg F | Mar | 001 |
| Temperature, water deg. fahrenheit | daily maximum | ≤ 91.4 deg F | all year | 001 |
| pH | instantaneous minimum | report only (SU) | all year | 001 |
| pH | instantaneous maximum | report only (SU) | all year | 001 |
| Cadmium, total [as Cd] | monthly average | report only (mg/L) | all year | 001 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | 001 |
| Iron, total [as Fe] | monthly average | report only (mg/L) | all year | 001 |
| Iron, total [as Fe] | daily maximum | report only (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 | ≤ 855 MGD | all year | 001 |
| Chlorine, total residual | instantaneous maximum | ≤ .2 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | 003 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 45 mg/L | all year | 003 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 003 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 003 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 003 |
| Solids, total suspended | daily maximum | ≤ 45 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 |
| Coliform, fecal general | 30-day geometric mean | ≤ 200 #/100mL | all year | 003 |
| Coliform, fecal general | daily maximum | ≤ 400 #/100mL | all year | 003 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 005 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 005 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 005 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 005 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 005 |
| Oil and grease, hexane extr method | monthly average | ≤ 15 mg/L | all year | 005 |
| Oil and grease, hexane extr method | daily maximum | ≤ 20 mg/L | all year | 005 |
| Arsenic, total [as As] | monthly average | report only (mg/L) | all year | 005 |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year | 005 |
| Cadmium, total [as Cd] | monthly average | report only (mg/L) | all year | 005 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | 005 |
| Chromium, total [as Cr] | monthly average | report only (mg/L) | all year | 005 |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year | 005 |
| Copper, total [as Cu] | monthly average | ≤ 7.2 lb/d | all year | 005 |
| Copper, total [as Cu] | daily maximum | ≤ 22.5 lb/d | all year | 005 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 005 |
| Iron, total [as Fe] | monthly average | ≤ 67 lb/d | all year | 005 |
| Iron, total [as Fe] | daily maximum | ≤ 220 lb/d | all year | 005 |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | all year | 005 |
| Lead, total [as Pb] | monthly average | report only (mg/L) | all year | 005 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 005 |
| Nickel, total [as Ni] | monthly average | report only (mg/L) | all year | 005 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | 005 |
| Zinc, total [as Zn] | monthly average | report only (mg/L) | all year | 005 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 005 |
| Selenium, total [as Se] | monthly average | report only (mg/L) | all year | 005 |
| Selenium, total [as Se] | daily maximum | report only (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 |
| Mercury, total [as Hg] | monthly average | report only (mg/L) | all year | 005 |
| Mercury, total [as Hg] | daily maximum | report only (mg/L) | all year | 005 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 006 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 006 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 006 |
| Oil and grease, hexane extr method | monthly average | ≤ 15 mg/L | all year | 006 |
| Oil and grease, hexane extr method | daily maximum | ≤ 20 mg/L | all year | 006 |
| 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 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 008 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 008 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 008 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 008 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 008 |
| Oil and grease, hexane extr method | monthly average | ≤ 15 mg/L | all year | 008 |
| Oil and grease, hexane extr method | daily maximum | ≤ 20 mg/L | all year | 008 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 008 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 008 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 009 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 009 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 009 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 009 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 009 |
| Oil and grease, hexane extr method | monthly average | ≤ 15 mg/L | all year | 009 |
| Oil and grease, hexane extr method | daily maximum | ≤ 20 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 |
| pH | instantaneous minimum | report only (SU) | all year | 011 |
| pH | instantaneous maximum | report only (SU) | 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 |
| %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | quarterly average | ≤ 25 % | all year | 011 |
| %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | maximum | ≤ 40 % | all year | 011 |
| %Mortality 7Day Chronic Ceriodaphnia dubia | quarterly average | report only (%) | all year | 011 |
| %Mortality 7Day Chronic Ceriodaphnia dubia | maximum | report only (%) | all year | 011 |
| %Repro Reduc Static Renewal7D Chronic Ceriodaphnia dubia | quarterly average | report only (%) | all year | 011 |
| %Repro Reduc Static Renewal7D Chronic Ceriodaphnia dubia | maximum | report only (%) | all year | 011 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 013 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 013 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 013 |
| Oil and grease, hexane extr method | monthly average | ≤ 15 mg/L | all year | 013 |
| Oil and grease, hexane extr method | daily maximum | ≤ 20 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 | instantaneous maximum | ≤ 9 SU | all year | 014 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 014 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 014 |
Cited limits by parameter: South Carolina's rules and the federal ones.
Same industry: the 17 Electric Services permits in South Carolina.
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