Clean Water Act discharge permit · NPDES NC0031879
CORPENING CREEK WWTP, Marion, NC: NPDES NC0031879 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 13Pollutants under a numeric limit
- 10Pollutants with an effluent exceedance
CORPENING CREEK WWTP, held by City of Marion, holds NPDES permit NC0031879. EPA’s file records it issued March 28, 2016 and expiring January 31, 2020. 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 | CORPENING CREEK WWTP |
|---|---|
| Permittee as filed | City of Marion |
| NPDES ID | NC0031879 |
| 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 | March 28, 2016 |
| Expiration date | January 31, 2020 |
| Address | Marion, NC 28752 |
| Subwatershed | Magness Creek-First Broad River (HUC 030501050702) |
| Program components on file | Biosolids, POTW |
| 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
- 13Under a numeric limit
- 20With a violation of any kind
- 10With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 3 | 69 | 35 | January 31, 2022 | 3,531% over the limit |
| Cyanide, total [as CN] | 2 | 35 | 29 | September 30, 2025 | 1,367% over the limit |
| Nitrogen, ammonia total [as N] | 4 | 52 | 28 | February 28, 2023 | 425% over the limit |
| Chlorine, total residual | 1 | 18 | 17 | May 31, 2014 | 43,900% over the limit |
| pH | 2 | 22 | 16 | May 31, 2020 | |
| BOD, 5-day, 20 deg. C | 3 | 46 | 12 | December 31, 2021 | 389% over the limit |
| Oxygen, dissolved [DO] | 5 | 23 | 12 | May 31, 2020 | 92% over the limit |
| Coliform, fecal MF, MFC broth, 44.5 C | 2 | 15 | 6 | April 30, 2025 | 233% over the limit |
| Cadmium, total [as Cd] | 0 | 8 | 2 | October 31, 2010 | 400% over the limit |
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | 0 | 4 | 1 | August 31, 2009 | |
| Temperature, water deg. centigrade | 5 | 11 | 0 | ||
| Flow, in conduit or thru treatment plant | 1 | 8 | 0 | ||
| Nitrogen, total [as N] | 1 | 5 | 0 | ||
| Phosphorus, total [as P] | 1 | 5 | 0 | ||
| Chv Statre 7Day Chronic Ceriodaphnia | 1 | 3 | 0 | ||
| Conductivity | 0 | 3 | 0 | ||
| Oil & Grease | 0 | 3 | 0 | ||
| Copper, total [as Cu] | 0 | 3 | 0 | ||
| Silver, total [as Ag] | 0 | 3 | 0 | ||
| Zinc, total [as Zn] | 0 | 3 | 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
- 3Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| September 16, 2025 | Permit Violations - Unapproved Operation | ST6 |
| August 15, 2023 | Permit Violations - Unapproved Operation | ST6 |
| February 5, 2021 | Permit Violations - Unapproved Operation | 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.
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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 NC0031879 there.
Nearby on the register
- Discharge permits in Marion
- Every permit record in Marion, A to Z
- Discharge permits in North Carolina
- Every permit record in North Carolina, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.