Clean Water Act discharge permit · NPDES SC0020052
SULLIVANS ISLAND WWTF, Sullivan'S Island, SC: NPDES SC0020052 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 14Pollutants under a numeric limit
- 2Pollutants with an effluent exceedance
SULLIVANS ISLAND WWTF, held by SULLIVANS ISLAND TOWN OF, holds NPDES permit SC0020052. EPA’s file records it issued December 6, 2018 and expiring December 31, 2023. 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 | SULLIVANS ISLAND WWTF |
|---|---|
| Permittee as filed | SULLIVANS ISLAND TOWN OF |
| NPDES ID | SC0020052 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | December 6, 2018 |
| Expiration date | December 31, 2023 |
| Issuing agency | State |
| Address | Sullivan'S Island, SC 29482 |
| Subwatershed | Lower Cooper River (HUC 030502010707) |
| 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
- 14Pollutants on file
- 14Under a numeric limit
- 11With a violation of any kind
- 2With 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 |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 8 | 5 | 1 | May 31, 2021 | 4% over the limit |
| Chlorine, total residual | 4 | 5 | 1 | April 30, 2020 | 90% over the limit |
| BOD, 5-day, 20 deg. C | 4 | 4 | 0 | ||
| Solids, total suspended | 4 | 4 | 0 | ||
| Enterococci | 4 | 4 | 0 | ||
| pH | 2 | 2 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 2 | 0 | ||
| Coliform, fecal general | 2 | 2 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 1 | 0 | ||
| BOD, 5-day, percent removal | 1 | 1 | 0 | ||
| Solids, suspended percent removal | 1 | 1 | 0 | ||
| % Effect Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 2 | 0 | 0 | ||
| LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | 1 | 0 | 0 | ||
| IC25 Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 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
- 6Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| January 4, 2023 | Permit Violations - CWA §308 Failure to submit required permit application information | ST6 |
| January 25, 2021 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| January 21, 2021 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| January 21, 2021 | Effluent Violations - Numeric effluent violation | ST6 |
| January 19, 2021 | Effluent Violations - Numeric effluent violation | ST6 |
| August 14, 2017 | 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 SC0020052 there.
Nearby on the register
- Discharge permits in Sullivan'S Island
- Every permit record in Sullivan'S Island, 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.