Clean Water Act discharge permit · NPDES SC0038822
DORCHESTER CO LOWER DORCHESTER WWTP, North Charleston, SC: NPDES SC0038822 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MajorDischarger class
- 18Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
DORCHESTER CO LOWER DORCHESTER WWTP, held by DORCHESTER COUNTY, holds NPDES permit SC0038822. EPA’s file records it issued October 18, 2022 and expiring November 30, 2027. 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 | DORCHESTER CO LOWER DORCHESTER WWTP |
|---|---|
| Permittee as filed | DORCHESTER COUNTY |
| NPDES ID | SC0038822 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | October 18, 2022 |
| Expiration date | November 30, 2027 |
| Issuing agency | State |
| Address | North Charleston, SC 29420 |
| Subwatershed | Middle Ashley River (HUC 030502010604) |
| 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
- 21Pollutants on file
- 18Under a numeric limit
- 17With 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 |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 8 | 114 | 78 | April 30, 2024 | 1,973% over the limit |
| Enterococci | 4 | 25 | 13 | April 30, 2026 | 2,227% over the limit |
| %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 15 | 9 | July 31, 2022 | 150% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 26 | 2 | June 30, 2022 | 52% over the limit |
| Zinc, total [as Zn] | 0 | 2 | 2 | May 31, 2013 | 216% over the limit |
| Coliform, fecal general | 0 | 3 | 1 | March 31, 2013 | 180% over the limit |
| Solids, total suspended | 4 | 24 | 0 | ||
| Nitrogen, total [as N] | 4 | 24 | 0 | ||
| Copper, total [as Cu] | 4 | 20 | 0 | ||
| Chlorine, total residual | 4 | 18 | 0 | ||
| pH | 2 | 12 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 12 | 0 | ||
| Mercury, total [as Hg] | 4 | 8 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 6 | 0 | ||
| Solids, suspended percent removal | 1 | 6 | 0 | ||
| Carbonaceous oxygen demand, % removal | 1 | 6 | 0 | ||
| Silver, total [as Ag] | 0 | 2 | 0 | ||
| Oxygen demand, ultimate | 12 | 0 | 0 | ||
| Phosphorus, total [as P] | 4 | 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
- 4Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| February 22, 2024 | Pretreatment - Failure to Meet Inspection and Sampling Plan for SIUs | ST6 |
| July 12, 2023 | Pretreatment - IU Violation of Pretreatment Standards | ST6 |
| July 12, 2023 | Pretreatment - Failure to Meet Inspection and Sampling Plan for SIUs | ST6 |
| February 15, 2023 | Pretreatment - Failure to Meet Inspection and Sampling Plan for SIUs | 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.
Watch this permit
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, SC0038822.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
How we handle your data → Privacy
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 SC0038822 there.
Nearby on the register
- Discharge permits in North Charleston
- Every permit record in North Charleston, 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.