Clean Water Act discharge permit · NPDES SC0025356
FLORENCE CITY OF TIMMONSVILLE WWTP, Timmonsville, SC: NPDES SC0025356 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MajorDischarger class
- 16Pollutants under a numeric limit
- 17Pollutants with an effluent exceedance
FLORENCE CITY OF TIMMONSVILLE WWTP, held by FLORENCE CITY OF, holds NPDES permit SC0025356. EPA’s file records it issued January 4, 2024 and expiring June 30, 2026. 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 | FLORENCE CITY OF TIMMONSVILLE WWTP |
|---|---|
| Permittee as filed | FLORENCE CITY OF |
| NPDES ID | SC0025356 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | January 4, 2024 |
| Expiration date | June 30, 2026 |
| Issuing agency | State |
| Address | Timmonsville, SC 29161 |
| Subwatershed | Upper Sparrow Swamp (HUC 030402020405) |
| 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
- 25Pollutants on file
- 16Under a numeric limit
- 23With a violation of any kind
- 17With 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 | 210 | 173 | August 31, 2025 | 99,999% over the limit |
| BOD, 5-day, 20 deg. C | 8 | 126 | 57 | June 30, 2014 | 498% over the limit |
| Chlorine, total residual | 4 | 61 | 45 | January 31, 2023 | 8,637% over the limit |
| IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubia | 1 | 45 | 25 | September 30, 2013 | 99,999% over the limit |
| Oxygen, dissolved [DO] | 1 | 38 | 25 | August 31, 2019 | 67% over the limit |
| Solids, suspended percent removal | 1 | 53 | 17 | August 31, 2013 | 218% over the limit |
| %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 18 | 16 | December 31, 2024 | 300% over the limit |
| pH | 2 | 39 | 15 | January 31, 2018 | |
| Coliform, fecal general | 0 | 37 | 15 | October 31, 2012 | 99,999% over the limit |
| BOD, 5-day, percent removal | 1 | 49 | 13 | September 30, 2013 | 525% over the limit |
| Flow, in conduit or thru treatment plant | 2 | 41 | 12 | October 31, 2014 | 481% over the limit |
| Dilution factor | 0 | 14 | 11 | July 31, 2008 | 100% over the limit |
| IC25 Static Renewal 7 Day Chronic Chrpimephales | 0 | 26 | 7 | September 30, 2013 | 77% over the limit |
| Copper, total [as Cu] | 4 | 13 | 7 | June 30, 2026 | 211% over the limit |
| Arsenic, total recoverable | 0 | 9 | 2 | December 31, 2006 | 1,182% over the limit |
| Mercury, total recoverable | 0 | 6 | 2 | June 30, 2013 | 300% over the limit |
| Solids, total suspended | 4 | 71 | 1 | June 30, 2013 | 18% over the limit |
| Nitrogen, total [as N] | 4 | 68 | 0 | ||
| Phosphorus, total [as P] | 4 | 68 | 0 | ||
| Copper, total recoverable | 0 | 7 | 0 | ||
| Overflows | 0 | 7 | 0 | ||
| Overflow volume [SS0 volume, CSO volume] | 0 | 7 | 0 | ||
| Stream flow, instantaneous | 0 | 2 | 0 | ||
| E. coli | 4 | 0 | 0 | ||
| LC50 Static 48Hr Acute 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
- 10Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| September 25, 2025 | Permit Violations - Violation Specified in Comment | ST6 |
| September 25, 2025 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| April 10, 2025 | Pretreatment - Failure to Meet Inspection and Sampling Plan for SIUs | ST6 |
| June 18, 2024 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| June 18, 2024 | Permit Violations - Violation Specified in Comment | ST6 |
| August 4, 2021 | Pretreatment - Failure to submit required report (non-DMR) | ST6 |
| August 1, 2021 | Pretreatment - Failure to submit required report (non-DMR) | ST6 |
| July 29, 2021 | Pretreatment - Failure to submit required report (non-DMR) | ST6 |
| January 24, 2021 | Permit Violations - Violation Specified in Comment | ST6 |
| August 14, 2020 | Management Practice Violations - Failure to Maintain Records | 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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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 October 14, 2026.