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Electric Services, major discharger, York, South Carolina. NPDES permit SC0004278 expired Dec 31, 2023; 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 | monthly average | report only (deg F) | all year | 001 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 001 |
| Temp. diff. between samp. & upstrm deg. F | monthly average | ≤ 10 deg F | Apr–Sep | 001 |
| Temp. diff. between samp. & upstrm deg. F | monthly average | ≤ 14 deg F | Jan, Feb, Mar, Oct, Nov, Dec | 001 |
| pH | instantaneous minimum | report only (SU) | all year | 001 |
| pH | instantaneous maximum | report only (SU) | all year | 001 |
| Copper, total [as Cu] | monthly average | ≤ 36.8 ug/L | all year | 001 |
| Copper, total [as Cu] | daily maximum | ≤ 48.3 ug/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 | ≤ 11 ug/L | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ 19 ug/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 |
| Algae, presence | instantaneous minimum | report only (N=0;Y=1) | all year | 001 |
| Algae, presence | instantaneous maximum | report only (N=0;Y=1) | all year | 001 |
| LC50 Static 48Hr Acute Ceriodaphnia dubia | minimum | report only (%) | all year | 001 |
| %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | monthly average | = 25 % | all year | 001 |
| %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | daily maximum | = 40 % | all year | 001 |
| Pass/Fail Static 48Hr Acute Ceriodaphnia dubia | daily maximum | = 0 pass=0;fail=1 | all year | 001 |
| IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubia | minimum | report only (%) | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 002 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 002 |
| pH | instantaneous minimum | report only (SU) | all year | 002 |
| pH | instantaneous maximum | report only (SU) | all year | 002 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 002 |
| Oil & Grease | monthly average | ≤ 15 mg/L | all year | 002 |
| Oil & Grease | daily maximum | ≤ 20 mg/L | all year | 002 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year | 002 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 002 |
| Cadmium, total [as Cd] | monthly average | report only (ug/L) | all year | 002 |
| Cadmium, total [as Cd] | daily maximum | report only (ug/L) | all year | 002 |
| Copper, total [as Cu] | monthly average | report only (ug/L) | all year | 002 |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | all year | 002 |
| Copper, total [as Cu] | monthly average | = 47.1 ug/L | all year | 002 |
| Copper, total [as Cu] | daily maximum | = 63.8 ug/L | all year | 002 |
| Iron, total [as Fe] | monthly average | ≤ .635 mg/L | all year | 002 |
| Iron, total [as Fe] | daily maximum | ≤ .635 mg/L | all year | 002 |
| Lead, total [as Pb] | monthly average | report only (ug/L) | all year | 002 |
| Lead, total [as Pb] | daily maximum | report only (ug/L) | all year | 002 |
| Zinc, total [as Zn] | daily maximum | report only (ug/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 |
| Chlorine, total residual | monthly average | ≤ 11 ug/L | all year | 002 |
| Chlorine, total residual | daily maximum | ≤ 19 ug/L | all year | 002 |
| Algae, presence | instantaneous minimum | report only (N=0;Y=1) | all year | 002 |
| Algae, presence | instantaneous maximum | report only (N=0;Y=1) | all year | 002 |
| Hydrazine | daily maximum | ≤ 77 ug/L | all year | 002 |
| Pass/Fail Static 48Hr Acute Ceriodaphnia dubia | daily maximum | ≤ 0 pass=0;fail=1 | all year | 002 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 006 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 006 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 006 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 006 |
| Temp. diff. between samp. & upstrm deg. F | daily maximum | report only (deg F) | all year | 006 |
| pH | instantaneous minimum | report only (SU) | all year | 006 |
| pH | instantaneous maximum | report only (SU) | 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 |
| Chlorine, total residual | monthly average | ≤ 11 ug/L | all year | 006 |
| Chlorine, total residual | daily maximum | ≤ 19 ug/L | all year | 006 |
| Chlorine, free available | monthly average | ≤ .2 mg/L | all year | 006 |
| Chlorine, free available | daily maximum | ≤ .5 mg/L | all year | 006 |
| Algae, presence | instantaneous minimum | report only (N=0;Y=1) | all year | 006 |
| Algae, presence | instantaneous maximum | report only (N=0;Y=1) | all year | 006 |
| Copper, total [as Cu] | monthly average | ≤ 1 mg/L | all year | 01A |
| Copper, total [as Cu] | daily maximum | ≤ 1 mg/L | all year | 01A |
| Iron, total [as Fe] | monthly average | ≤ 1 mg/L | all year | 01A |
| Iron, total [as Fe] | daily maximum | ≤ 1 mg/L | all year | 01A |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 01A |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 01A |
| pH | instantaneous minimum | ≥ 6 SU | all year | 01B |
| pH | instantaneous maximum | ≤ 9 SU | all year | 01B |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 01B |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 01B |
| Chlorine, free available | monthly average | ≤ .2 mg/L | all year | 01B |
| Chlorine, free available | daily maximum | ≤ .5 mg/L | all year | 01B |
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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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/SC0004278 · MCP: https://passage-data.com/mcp