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Electric Services, major discharger, Georgetown, South Carolina. NPDES permit SC0022471, in force until Jun 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 | instantaneous maximum | ≤ 93 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 |
| 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 | ≤ 5 deg F | all year | 001 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 001 |
| pH | instantaneous maximum | ≤ 8.5 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 29.4 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 95.4 mg/L | all year | 001 |
| Oil & Grease | monthly average | ≤ 8 mg/L | all year | 001 |
| Oil & Grease | daily maximum | ≤ 11 mg/L | all year | 001 |
| Arsenic, total [as As] | monthly average | ≤ 42.1 ug/L | all year | 001 |
| Arsenic, total [as As] | daily maximum | ≤ 80.7 ug/L | all year | 001 |
| Copper, total [as Cu] | monthly average | ≤ 4.3 ug/L | all year | 001 |
| Copper, total [as Cu] | daily maximum | ≤ 6.8 ug/L | all year | 001 |
| Thallium, total [as Tl] | monthly average | report only (ug/L) | all year | 001 |
| Thallium, total [as Tl] | daily maximum | report only (ug/L) | all year | 001 |
| Nickel, total [as Ni] | monthly average | ≤ 9.7 ug/L | all year | 001 |
| Nickel, total [as Ni] | daily maximum | ≤ 87.7 ug/L | all year | 001 |
| Selenium, total [as Se] | monthly average | ≤ 5.8 ug/L | all year | 001 |
| Selenium, total [as Se] | daily maximum | ≤ 23.4 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 | ≤ 8.8 ug/L | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ 15.2 ug/L | all year | 001 |
| Number of Events | daily maximum | report only (#) | all year | 001 |
| Mercury, total [as Hg] | monthly average | report only (ng/L) | all year | 001 |
| Mercury, total [as Hg] | daily maximum | report only (ng/L) | all year | 001 |
| Duration of discharge | daily maximum | report only (hr) | all year | 001 |
| LC50 Static 48Hr Acute Ceriodaphnia dubia | daily minimum | report only (%) | all year | 001 |
| Pass/Fail Static 48Hr Acute Ceriodaphnia dubia | daily maximum | ≤ 0 pass=0;fail=1 | all year | 001 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | Mar, Apr, May, Sep, Oct, Nov | 002 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | Jun–Aug | 002 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | Jan, Feb, Dec | 002 |
| Temperature, water deg. fahrenheit | instantaneous maximum | ≤ 97 deg F | Mar, Apr, May, Sep, Oct, Nov | 002 |
| Temperature, water deg. fahrenheit | instantaneous maximum | ≤ 105 deg F | Jun–Aug | 002 |
| Temperature, water deg. fahrenheit | instantaneous maximum | ≤ 86 deg F | Jan, Feb, Dec | 002 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 002 |
| Temperature, water deg. fahrenheit | instantaneous maximum | report only (deg F) | all year | 002 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 002 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | monthly average | ≤ 29.4 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 95.4 mg/L | all year | 002 |
| Oil & Grease | monthly average | ≤ 8 mg/L | all year | 002 |
| Oil & Grease | daily maximum | ≤ 11 mg/L | all year | 002 |
| Arsenic, total [as As] | monthly average | report only (ug/L) | all year | 002 |
| Arsenic, total [as As] | daily maximum | report only (ug/L) | all year | 002 |
| Selenium, total [as Se] | monthly average | report only (ug/L) | all year | 002 |
| Selenium, total [as Se] | 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 | report only (mg/L) | all year | 002 |
| Chlorine, total residual | daily maximum | report only (mg/L) | all year | 002 |
| Mercury, total [as Hg] | monthly average | report only (ng/L) | all year | 002 |
| Mercury, total [as Hg] | daily maximum | report only (ng/L) | all year | 002 |
| LC50 Static 48Hr Acute Ceriodaphnia dubia | daily minimum | report only (%) | all year | 002 |
| %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | monthly average | ≤ 25 % | all year | 002 |
| %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | daily maximum | ≤ 40 % | all year | 002 |
| IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubia | daily minimum | report only (%) | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 02A |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 02A |
| Chlorine, free available | monthly average | ≤ .2 mg/L | all year | 02A |
| Chlorine, free available | daily maximum | ≤ .5 mg/L | all year | 02A |
| Nitrite + Nitrate total [as N] | monthly average | ≤ 3 mg/L | all year | 02E |
| Nitrite + Nitrate total [as N] | daily maximum | ≤ 4 mg/L | all year | 02E |
| Arsenic, total [as As] | monthly average | ≤ 8 ug/L | all year | 02E |
| Arsenic, total [as As] | daily maximum | ≤ 18 ug/L | all year | 02E |
| Selenium, total [as Se] | monthly average | ≤ 29 ug/L | all year | 02E |
| Selenium, total [as Se] | daily maximum | ≤ 70 ug/L | all year | 02E |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 02E |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 02E |
| Mercury, total [as Hg] | monthly average | ≤ 34 ng/L | all year | 02E |
| Mercury, total [as Hg] | daily maximum | ≤ 103 ng/L | all year | 02E |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 02F |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 02F |
| Number of Events | monthly total | ≤ 0 # exceed | all year | 02F |
| Flow | daily maximum | ≤ 11492 gal/d | all year | 02F |
| Parameter | New limit | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|
| Length of longest pH excursion, instantaneous maximum | 60 min | new | — | — |
| pH range excursions, monthly total accum, monthly maximum | 446 min | new | — | — |
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/SC0022471 · MCP: https://passage-data.com/mcp