Clean Water Act discharge permit · NPDES SC0025691
ECW&SA JOHNSTON #1 WWTP, Johnston, SC: NPDES SC0025691 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 14Pollutants under a numeric limit
- 11Pollutants with an effluent exceedance
ECW&SA JOHNSTON #1 WWTP, held by ECW&SA/JOHNSTON #1 WWTP, holds NPDES permit SC0025691, which discharges to S Fork Edisto Rv. EPA’s file records it issued January 29, 2010 and expiring February 28, 2014. 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 | ECW&SA JOHNSTON #1 WWTP |
|---|---|
| Permittee as filed | ECW&SA/JOHNSTON #1 WWTP |
| NPDES ID | SC0025691 |
| 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 | January 29, 2010 |
| Expiration date | February 28, 2014 |
| Address | Johnston, SC 29832 |
| Receiving water | S FORK EDISTO RV |
| Subwatershed | Headwaters South Fork Edisto River (HUC 030502040101) |
| 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
- 20Pollutants on file
- 14Under a numeric limit
- 19With a violation of any kind
- 11With 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 | 71 | 59 | January 31, 2018 | 305% over the limit |
| Chlorine, total residual | 4 | 16 | 8 | September 30, 2015 | 317% over the limit |
| Oxygen demand, ultimate | 2 | 13 | 5 | December 31, 2013 | 98% over the limit |
| Copper, total recoverable | 0 | 10 | 4 | May 31, 2008 | 511% over the limit |
| BOD, 5-day, 20 deg. C | 4 | 24 | 3 | December 31, 2014 | 873% over the limit |
| Cadmium, total [as Cd] | 4 | 3 | 3 | March 31, 2010 | 233% over the limit |
| pH | 2 | 10 | 1 | August 31, 2010 | |
| Cadmium, total recoverable | 0 | 9 | 1 | October 31, 2006 | 150% over the limit |
| Solids, suspended percent removal | 1 | 8 | 1 | February 29, 2008 | 11% over the limit |
| Coliform, fecal general | 2 | 7 | 1 | October 31, 2008 | 14% over the limit |
| Oxygen, dissolved [DO] | 1 | 5 | 1 | April 30, 2009 | 3% over the limit |
| Solids, total suspended | 4 | 24 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 8 | 0 | ||
| BOD, 5-day, percent removal | 1 | 8 | 0 | ||
| IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubia | 0 | 7 | 0 | ||
| IC25 Static Renewal 7 Day Chronic Chrpimephales | 0 | 7 | 0 | ||
| Mercury, total [as Hg] | 4 | 4 | 0 | ||
| Overflows | 0 | 3 | 0 | ||
| Overflow volume [SS0 volume, CSO volume] | 0 | 3 | 0 | ||
| Copper, total [as Cu] | 8 | 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 SC0025691.
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 SC0025691 there.
Nearby on the register
- Discharge permits in Johnston
- Every permit record in Johnston, 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.