Clean Water Act discharge permit · NPDES SC0047074
CHARLESTON CPW DANIEL ISLAND, Charleston, SC: NPDES SC0047074 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 11Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
CHARLESTON CPW DANIEL ISLAND, held by CHARLESTON WATER SYSTEM, holds NPDES permit SC0047074. EPA’s file records it issued September 23, 2019 and expiring October 31, 2024. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | CHARLESTON CPW DANIEL ISLAND |
|---|---|
| Permittee as filed | CHARLESTON WATER SYSTEM |
| NPDES ID | SC0047074 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | September 23, 2019 |
| Expiration date | October 31, 2024 |
| Issuing agency | State |
| Address | Charleston, SC 29492 |
| Subwatershed | Lower Cooper River (HUC 030502010707) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 15Pollutants on file
- 11Under a numeric limit
- 14With a violation of any kind
- 5With 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 |
|---|---|---|---|---|---|
| Flow, in conduit or thru treatment plant | 2 | 62 | 22 | January 31, 2007 | 16% over the limit |
| Nitrogen, ammonia total [as N] | 8 | 93 | 13 | September 30, 2006 | 133% over the limit |
| BOD, 5-day, 20 deg. C | 0 | 6 | 6 | April 30, 2007 | 131% over the limit |
| Coliform, fecal general | 0 | 5 | 5 | May 31, 2007 | 400% over the limit |
| pH | 2 | 41 | 1 | November 30, 2004 | |
| Solids, total suspended | 4 | 80 | 0 | ||
| Enterococci | 4 | 80 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 4 | 80 | 0 | ||
| Chlorine, total residual | 2 | 80 | 0 | ||
| Di[2-ethylhexyl] phthalate [DEHP] | 0 | 80 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 20 | 0 | ||
| Solids, suspended percent removal | 1 | 20 | 0 | ||
| Carbonaceous oxygen demand, % removal | 1 | 20 | 0 | ||
| % Effect Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 0 | 16 | 0 | ||
| %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 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 SC0047074.
Velarion’s copy of EPA’s ICIS-NPDES files does not yet 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, SC0047074.
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 SC0047074 there.
Nearby on the register
- Discharge permits in Charleston
- Every permit record in 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 September 15, 2026.