Clean Water Act discharge permit · NPDES SC0020371
FORT MILL WWTF, Fort Mill, SC: NPDES SC0020371 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MajorDischarger class
- 16Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
FORT MILL WWTF, held by FORT MILL TOWN OF, holds NPDES permit SC0020371. EPA’s file records it issued November 23, 2021 and expiring December 31, 2026. 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 | FORT MILL WWTF |
|---|---|
| Permittee as filed | FORT MILL TOWN OF |
| NPDES ID | SC0020371 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | November 23, 2021 |
| Expiration date | December 31, 2026 |
| Issuing agency | State |
| Address | Fort Mill, SC 29715 |
| Subwatershed | Burgis Creek-Catawba River (HUC 030501030602) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 16Pollutants on file
- 16Under a numeric limit
- 7With a violation of any kind
- 4With 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 |
|---|---|---|---|---|---|
| Phosphorus, total [as P] | 8 | 4 | 4 | July 31, 2024 | 56% over the limit |
| Chlorine, total residual | 8 | 1 | 1 | January 31, 2018 | 25% over the limit |
| E. coli | 8 | 1 | 1 | May 31, 2017 | 272% over the limit |
| BOD, 5-day, percent removal | 2 | 1 | 1 | March 31, 2021 | 73% over the limit |
| Nitrogen, ammonia total [as N] | 8 | 4 | 0 | ||
| Nitrogen, total [as N] | 7 | 4 | 0 | ||
| %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 2 | 0 | ||
| BOD, 5-day, 20 deg. C | 8 | 0 | 0 | ||
| Solids, total suspended | 8 | 0 | 0 | ||
| Oxygen demand, ultimate | 4 | 0 | 0 | ||
| pH | 4 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 0 | 0 | ||
| Oxygen, dissolved [DO] | 2 | 0 | 0 | ||
| Solids, suspended percent removal | 2 | 0 | 0 | ||
| LC50 Static 48Hr Acute Ceriodaphnia dubia | 1 | 0 | 0 | ||
| IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubia | 1 | 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
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| July 29, 2021 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| May 1, 2018 | Effluent Violations - Numeric effluent violation | 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.
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, SC0020371.
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 SC0020371 there.
Nearby on the register
- Discharge permits in Fort Mill
- Every permit record in Fort Mill, 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.