Clean Water Act discharge permit · NPDES SC0020443
ROCK HILL MANCHESTER CREEK, Rock Hill, SC: NPDES SC0020443 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MajorDischarger class
- 16Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
ROCK HILL MANCHESTER CREEK, held by ROCK HILL CITY OF, holds NPDES permit SC0020443. EPA’s file records it issued April 10, 2023 and expiring April 30, 2028. 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 | ROCK HILL MANCHESTER CREEK |
|---|---|
| Permittee as filed | ROCK HILL CITY OF |
| NPDES ID | SC0020443 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | April 10, 2023 |
| Expiration date | April 30, 2028 |
| Issuing agency | State |
| Address | Rock Hill, SC 29730 |
| Subwatershed | Burgis Creek-Catawba River (HUC 030501030602) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 19Pollutants on file
- 16Under a numeric limit
- 15With a violation of any kind
- 8With 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 |
|---|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 4 | 24 | 20 | February 29, 2020 | 99,999% over the limit |
| Solids, total suspended | 4 | 10 | 6 | February 29, 2020 | 87% over the limit |
| Coliform, fecal general | 0 | 9 | 5 | January 31, 2014 | 99,999% over the limit |
| Chlorine, total residual | 4 | 10 | 4 | August 31, 2024 | 220% over the limit |
| Phosphorus, total [as P] | 6 | 15 | 3 | June 30, 2025 | 46% over the limit |
| E. coli | 4 | 7 | 3 | April 30, 2020 | 99,999% over the limit |
| pH | 2 | 6 | 2 | July 31, 2026 | |
| Oxygen, dissolved [DO] | 1 | 3 | 1 | April 30, 2017 | 4% over the limit |
| Nitrogen, total [as N] | 5 | 8 | 0 | ||
| Nitrogen, ammonia total [as N] | 4 | 8 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 4 | 0 | ||
| Nitrogen, nitrate total [as N] | 0 | 4 | 0 | ||
| BOD, 5-day, percent removal | 1 | 2 | 0 | ||
| Solids, suspended percent removal | 1 | 2 | 0 | ||
| Color [PT-CO units] | 0 | 2 | 0 | ||
| Oxygen demand, ultimate | 2 | 0 | 0 | ||
| %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | 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
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| February 21, 2025 | Pretreatment - Failure to Establish Self-Monitoring Requirements | 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 SC0020443 there.
Nearby on the register
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- Every permit record in South Carolina, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.