Clean Water Act discharge permit · NPDES SC0046191
HILTON HEAD NO 1 PSD WWTP, Hilton Head, Sc 29925, SC: NPDES SC0046191 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MajorDischarger class
- 18Pollutants under a numeric limit
- 9Pollutants with an effluent exceedance
HILTON HEAD NO 1 PSD WWTP, held by HILTON HEAD PUBLIC SERVICE DISTRICT, holds NPDES permit SC0046191. EPA’s file records it issued December 8, 2020 and expiring December 31, 2025. 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 | HILTON HEAD NO 1 PSD WWTP |
|---|---|
| Permittee as filed | HILTON HEAD PUBLIC SERVICE DISTRICT |
| NPDES ID | SC0046191 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | December 8, 2020 |
| Expiration date | December 31, 2025 |
| Issuing agency | State |
| Address | Hilton Head, Sc 29925, SC 29925 |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Broad River-Port Royal Sound (HUC 030502080608) |
| Program components on file | POTW, Pretreatment |
| NAICS | 221320 – Sewage Treatment Facilities |
| SIC | 4952 – Sewerage Systems |
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
- 22Pollutants on file
- 18Under a numeric limit
- 19With a violation of any kind
- 9With 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 |
|---|---|---|---|---|---|
| Dibromochloromethane | 0 | 323 | 15 | October 31, 2020 | 162% over the limit |
| Zinc, total [as Zn] | 4 | 315 | 11 | February 28, 2026 | 1,163% over the limit |
| BOD, 5-day, 20 deg. C | 4 | 311 | 7 | March 31, 2025 | 26% over the limit |
| Dichlorobromomethane | 4 | 310 | 6 | October 31, 2020 | 59% over the limit |
| Coliform, fecal general | 4 | 161 | 5 | May 31, 2026 | 2,923% over the limit |
| Flow, in conduit or thru treatment plant | 12 | 918 | 4 | November 30, 2005 | 170% over the limit |
| %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 27 | 3 | December 31, 2022 | 79% over the limit |
| Solids, total suspended | 4 | 305 | 1 | January 31, 2026 | 23% over the limit |
| Nitrogen, ammonia total [as N] | 4 | 305 | 1 | January 31, 2007 | 81% over the limit |
| Chlorine, total residual | 10 | 760 | 0 | ||
| Copper, total [as Cu] | 0 | 304 | 0 | ||
| Enterococci | 4 | 152 | 0 | ||
| pH | 2 | 152 | 0 | ||
| Hardness, total [as CaCO3] | 2 | 152 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 76 | 0 | ||
| BOD, 5-day, percent removal | 1 | 76 | 0 | ||
| Solids, suspended percent removal | 1 | 76 | 0 | ||
| %Mortality 7Day Chronic Ceriodaphnia dubia | 0 | 24 | 0 | ||
| %Repro Reduc Static Renewal7D Chronic Ceriodaphnia dubia | 0 | 24 | 0 | ||
| Cyanide, free available | 8 | 0 | 0 | ||
| LC50 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
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| May 13, 2026 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
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.
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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 SC0046191 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.