Clean Water Act discharge permit · NPDES SC0029408
GSW&SA MULLINS WWTP, Mullins, SC: NPDES SC0029408 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 17Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
GSW&SA MULLINS WWTP, held by GSW&SA/MULLINS WWTP, holds NPDES permit SC0029408, which discharges to White Oak Ck-Little Pee Dee. EPA’s file records it issued November 21, 2011 and expiring December 31, 2016. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | GSW&SA MULLINS WWTP |
|---|---|
| Permittee as filed | GSW&SA/MULLINS WWTP |
| NPDES ID | SC0029408 |
| 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 | November 21, 2011 |
| Expiration date | December 31, 2016 |
| Address | Mullins, SC 29574 |
| Receiving water | WHITE OAK CK-LITTLE PEE DEE |
| Subwatershed | Back Swamp-Little Pee Dee River (HUC 030402040803) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 20Pollutants on file
- 17Under 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 |
|---|---|---|---|---|---|
| %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 14 | 10 | September 30, 2013 | 300% over the limit |
| Zinc, total [as Zn] | 4 | 8 | 6 | January 31, 2011 | 56% over the limit |
| Nitrogen, ammonia total [as N] | 8 | 3 | 3 | May 31, 2015 | 127% over the limit |
| Flow, in conduit or thru treatment plant | 2 | 4 | 2 | December 31, 2006 | 8% over the limit |
| Coliform, fecal general | 2 | 4 | 2 | March 31, 2007 | 1,047% over the limit |
| E. coli | 4 | 1 | 1 | September 30, 2017 | 593% over the limit |
| Carbonaceous oxygen demand, % removal | 1 | 78 | 0 | ||
| %Mortality 7Day Chronic Ceriodaphnia dubia | 0 | 6 | 0 | ||
| %Repro Reduc Static Renewal7D Chronic Ceriodaphnia dubia | 0 | 6 | 0 | ||
| BOD, 5-day, 20 deg. C | 4 | 4 | 0 | ||
| Solids, total suspended | 4 | 4 | 0 | ||
| pH | 4 | 3 | 0 | ||
| Chlorine, total residual | 4 | 2 | 0 | ||
| Oxygen, dissolved [DO] | 2 | 2 | 0 | ||
| Cadmium, total [as Cd] | 0 | 2 | 0 | ||
| BOD, 5-day, percent removal | 2 | 1 | 0 | ||
| Solids, suspended percent removal | 1 | 1 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 8 | 0 | 0 | ||
| Dichlorodibromomethane | 8 | 0 | 0 | ||
| Mercury, total [as Hg] | 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
- 7Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| September 22, 2025 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| September 22, 2025 | Management Practice Violations - Failure to Maintain Records | ST6 |
| December 20, 2021 | Pretreatment - Failure to submit required report (non-DMR) | ST6 |
| October 13, 2020 | Monitoring Violations - Improper Analysis or Lab Error | ST6 |
| September 3, 2020 | Monitoring Violations - Improper Analysis or Lab Error | ST6 |
| February 26, 2020 | Monitoring Violations - Improper Analysis or Lab Error | ST6 |
| September 3, 2019 | Monitoring Violations - Improper Analysis or Lab Error | ST6 |
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, SC0029408.
Start the watch
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- One watershed — $2,990/year
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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 SC0029408 there.
Nearby on the register
- Discharge permits in Mullins
- Every permit record in Mullins, 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 14, 2026.