Clean Water Act discharge permit · NPDES SC0040436
WALTERBORO CITY OF WWTP, Walterboro, SC: NPDES SC0040436 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 17Pollutants under a numeric limit
- 10Pollutants with an effluent exceedance
WALTERBORO CITY OF WWTP, held by WALTERBORO CITY OF, holds NPDES permit SC0040436. EPA’s file records it issued August 6, 2019 and expiring May 31, 2020. 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 | WALTERBORO CITY OF WWTP |
|---|---|
| Permittee as filed | WALTERBORO CITY OF |
| NPDES ID | SC0040436 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | August 6, 2019 |
| Expiration date | May 31, 2020 |
| Issuing agency | State |
| Address | Walterboro, SC 29488 |
| Subwatershed | Ireland Creek (HUC 030502070803) |
| Program components on file | Biosolids, 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
- 21Pollutants on file
- 17Under a numeric limit
- 20With a violation of any kind
- 10With 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 | 36 | 27 | February 28, 2026 | 198% over the limit |
| %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 22 | 18 | June 30, 2025 | 184% over the limit |
| Copper, total [as Cu] | 4 | 15 | 11 | December 31, 2011 | 65,131% over the limit |
| Oxygen demand, ultimate | 2 | 27 | 7 | March 31, 2021 | 63% over the limit |
| E. coli | 4 | 6 | 6 | June 30, 2026 | 593% over the limit |
| BOD, 5-day, 20 deg. C | 4 | 13 | 5 | June 30, 2021 | 300% over the limit |
| Solids, suspended percent removal | 1 | 14 | 4 | April 30, 2007 | 100% over the limit |
| Coliform, fecal general | 0 | 6 | 2 | November 30, 2007 | 50% over the limit |
| pH | 2 | 5 | 1 | April 30, 2006 | |
| Lead, total [as Pb] | 0 | 5 | 1 | October 31, 2008 | 773% over the limit |
| Chlorine, total residual | 4 | 28 | 0 | ||
| BOD, 5-day, percent removal | 1 | 11 | 0 | ||
| Solids, total suspended | 4 | 8 | 0 | ||
| Nitrogen, total [as N] | 4 | 4 | 0 | ||
| Phosphorus, total [as P] | 4 | 4 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 4 | 0 | ||
| %Mortality 7Day Chronic Ceriodaphnia dubia | 0 | 4 | 0 | ||
| %Repro Reduc Static Renewal7D Chronic Ceriodaphnia dubia | 0 | 4 | 0 | ||
| Mercury, total [as Hg] | 4 | 2 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 2 | 0 | ||
| Cyanide, total [as CN] | 4 | 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
- 9Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| February 23, 2026 | Permit Violations - Violation Specified in Comment | ST6 |
| February 23, 2026 | Management Practice Violations - Failure to Maintain Records | ST6 |
| September 10, 2024 | Permit Violations - Violation Specified in Comment | ST6 |
| September 10, 2024 | Pretreatment - Failure to Meet Inspection and Sampling Plan for SIUs | ST6 |
| September 10, 2024 | Pretreatment - IU Violation of Pretreatment Standards | ST6 |
| October 12, 2023 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| October 9, 2020 | Permit Violations - Violation Specified in Comment | ST6 |
| October 17, 2019 | Management Practice Violations - Failure to Maintain Records | ST6 |
| June 26, 2018 | 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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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.