Clean Water Act discharge permit · NPDES SC0040631
CHAPIN TOWN OF WWTP, Chapin, SC: NPDES SC0040631 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MajorDischarger class
- 14Pollutants under a numeric limit
- 11Pollutants with an effluent exceedance
CHAPIN TOWN OF WWTP, held by CHAPIN TOWN OF, holds NPDES permit SC0040631. EPA’s file records it issued May 22, 2018 and expiring June 30, 2023. 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 | CHAPIN TOWN OF WWTP |
|---|---|
| Permittee as filed | CHAPIN TOWN OF |
| NPDES ID | SC0040631 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | May 22, 2018 |
| Expiration date | June 30, 2023 |
| Issuing agency | State |
| Address | Chapin, SC 29036 |
| Subwatershed | Wateree Creek (HUC 030501060702) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 19Pollutants 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 |
|---|---|---|---|---|---|
| Copper, total [as Cu] | 0 | 27 | 23 | April 30, 2018 | 277% over the limit |
| Solids, suspended percent removal | 2 | 6 | 6 | January 31, 2011 | 66% over the limit |
| BOD, 5-day, 20 deg. C | 8 | 9 | 5 | July 31, 2022 | 322% over the limit |
| pH | 4 | 6 | 4 | November 30, 2019 | |
| Coliform, fecal general | 0 | 6 | 4 | March 31, 2017 | 505% over the limit |
| Zinc, total [as Zn] | 0 | 6 | 2 | April 30, 2009 | 36% over the limit |
| E. coli | 8 | 2 | 2 | January 31, 2026 | 593% over the limit |
| Oxygen demand, ultimate | 8 | 25 | 1 | July 31, 2022 | 16% over the limit |
| Solids, total suspended | 8 | 5 | 1 | July 31, 2009 | 19% over the limit |
| BOD, 5-day, percent removal | 2 | 2 | 1 | April 30, 2008 | 23% over the limit |
| Nitrogen, ammonia total [as N] | 8 | 1 | 1 | January 31, 2026 | 25% over the limit |
| Nitrogen, total [as N] | 8 | 8 | 0 | ||
| Phosphorus, total [as P] | 8 | 8 | 0 | ||
| Chlorine, total residual | 8 | 4 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 3 | 0 | ||
| %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 2 | 0 | ||
| Oxygen, dissolved [DO] | 2 | 1 | 0 | ||
| LC50 Static 48Hr Acute Ceriodaphnia dubia | 0 | 1 | 0 | ||
| IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubia | 0 | 1 | 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 |
|---|---|---|
| November 25, 2025 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| October 29, 2025 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| October 28, 2025 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| May 9, 2024 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| April 29, 2024 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| November 1, 2021 | Permit Violations - Violation Specified in Comment | ST6 |
| August 26, 2020 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| February 8, 2019 | Management Practice Violations - Failure to Maintain Records | ST6 |
| February 8, 2019 | Management Practice Violations - Improper Operation and Maintenance | 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.
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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 SC0040631 there.
Nearby on the register
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- Every permit record in Chapin, 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.