Clean Water Act discharge permit · NPDES SC0022471
SCPSA (SANTEE COOPER)/WINYAH GENERATING STATION, Georgetown, SC: NPDES SC0022471 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MajorDischarger class
- 23Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
SCPSA (SANTEE COOPER)/WINYAH GENERATING STATION, held by South Carolina Public Service Authority (Santee Cooper) - Winyah Generating Stat, holds NPDES permit SC0022471. EPA’s file records it issued November 1, 2025 and expiring June 30, 2030. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | SCPSA (SANTEE COOPER)/WINYAH GENERATING STATION |
|---|---|
| Permittee as filed | South Carolina Public Service Authority (Santee Cooper) - Winyah Generating Stat |
| NPDES ID | SC0022471 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | November 1, 2025 |
| Expiration date | June 30, 2030 |
| Issuing agency | State |
| Address | Georgetown, SC 29440 |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Pennyroyal Creek (HUC 030402070105) |
| NAICS | 221112 – Fossil Fuel Electric Power Generation |
| SIC | 4911 – Electric Services |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 30Pollutants on file
- 23Under a numeric limit
- 19With a violation of any kind
- 6With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Solids, total suspended | 4 | 356 | 4 | May 31, 2022 | 62% over the limit |
| Arsenic, total recoverable | 0 | 353 | 4 | September 30, 2018 | 4,749% over the limit |
| Oil and grease, hexane extr method | 0 | 3 | 3 | January 31, 2002 | 895% over the limit |
| Manganese, total [as Mn] | 0 | 188 | 2 | September 30, 2018 | 170% over the limit |
| Temperature, water deg. fahrenheit | 16 | 355 | 1 | September 30, 2018 | 6% over the limit |
| pH | 6 | 353 | 1 | December 31, 2001 | |
| Flow, in conduit or thru treatment plant | 10 | 360 | 0 | ||
| Oil & Grease | 4 | 352 | 0 | ||
| Selenium, total [as Se] | 6 | 186 | 0 | ||
| Copper, total [as Cu] | 2 | 186 | 0 | ||
| Thallium, total [as Tl] | 2 | 186 | 0 | ||
| Nickel, total [as Ni] | 2 | 186 | 0 | ||
| Chlorine, total residual | 2 | 186 | 0 | ||
| Chlorine, free available | 2 | 186 | 0 | ||
| %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 124 | 0 | ||
| %Mortality 7Day Chronic Ceriodaphnia dubia | 0 | 124 | 0 | ||
| %Repro Reduc Static Renewal7D Chronic Ceriodaphnia dubia | 0 | 124 | 0 | ||
| Temp. diff. between up/down stream deg. F | 0 | 93 | 0 | ||
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | 0 | 1 | 0 | ||
| Arsenic, total [as As] | 6 | 0 | 0 | ||
| Mercury, total [as Hg] | 6 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 2 | 0 | 0 | ||
| Number of Events | 2 | 0 | 0 | ||
| LC50 Static 48Hr Acute Ceriodaphnia dubia | 2 | 0 | 0 | ||
| Length of longest pH excursion | 1 | 0 | 0 | ||
| Flow | 1 | 0 | 0 | ||
| Duration of discharge | 1 | 0 | 0 | ||
| pH range excursions, monthly total accum | 1 | 0 | 0 | ||
| Pass/Fail Static 48Hr Acute Ceriodaphnia dubia | 1 | 0 | 0 | ||
| IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubia | 1 | 0 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES SC0022471.
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
Watch this permit
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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID SC0022471 there.
Nearby on the register
- Discharge permits in Georgetown
- Every permit record in Georgetown, A to Z
- Discharge permits in South Carolina
- Every permit record in South Carolina, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.