Clean Water Act discharge permit · NPDES TX0057304
CITY OF SOUTH HOUSTON WWTP, South Houston, TX: NPDES TX0057304 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 52Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
CITY OF SOUTH HOUSTON WWTP, held by SOUTH HOUSTON, CITY OF, holds NPDES permit TX0057304, which discharges to Houston Ship Channel/Buffalo Bayou Tidal. EPA’s file records it issued March 11, 2020 and expiring March 11, 2025. 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 | CITY OF SOUTH HOUSTON WWTP |
|---|---|
| Permittee as filed | SOUTH HOUSTON, CITY OF |
| NPDES ID | TX0057304 |
| 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 11, 2020 |
| Expiration date | March 11, 2025 |
| Address | South Houston, TX 77587 |
| Receiving water | Houston Ship Channel/Buffalo Bayou Tidal |
| Subwatershed | Lower Sims Bayou (HUC 120401040502) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 53Pollutants on file
- 52Under a numeric limit
- 23With a violation of any kind
- 7With 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 |
|---|---|---|---|---|---|
| Whole effluent toxicity | 0 | 18 | 10 | December 31, 2007 | 99,999% over the limit |
| Nickel, sludge, total, dry weight [as Ni] | 3 | 10 | 10 | July 31, 2010 | 339% over the limit |
| Whole Effluent Toxicity [WET] - C. dubia | 2 | 4 | 4 | September 30, 2024 | 100% over the limit |
| Nitrogen, ammonia total [as N] | 3 | 12 | 3 | July 31, 2026 | 83% over the limit |
| pH | 3 | 8 | 2 | January 31, 2014 | |
| E. coli | 2 | 4 | 2 | January 31, 2026 | 41% over the limit |
| Mercury, sludge, total, dry weight [as Hg] | 3 | 1 | 1 | July 31, 2013 | 4% over the limit |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 2 | 22 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 2 | 22 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 2 | 22 | 0 | ||
| Mercury, total [as Hg] | 3 | 21 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas | 2 | 20 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 18 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 18 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 16 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 16 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 12 | 0 | ||
| Solids, total suspended | 3 | 9 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 3 | 9 | 0 | ||
| Chlorine, total residual | 2 | 6 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 3 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute D. Pulex | 1 | 3 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Pimephales promelas | 1 | 3 | 0 | ||
| Arsenic, dry weight | 5 | 0 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 5 | 0 | 0 | ||
| Selenium, dry weight | 3 | 0 | 0 | ||
| Whole effluent toxicity - retest #1 | 3 | 0 | 0 | ||
| Whole effluent toxicity - retest #2 | 3 | 0 | 0 | ||
| Copper, dry weight | 3 | 0 | 0 | ||
| Cadmium, dry weight | 3 | 0 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 0 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 0 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 0 | 0 | ||
| Nickel, total [as Ni] | 2 | 0 | 0 | ||
| Level of pathogen requirements achieved | 2 | 0 | 0 | ||
| Description of pathogen option used | 2 | 0 | 0 | ||
| Vector attraction reduction alternative used | 2 | 0 | 0 | ||
| Fecal coliform | 1 | 0 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 1 | 0 | 0 | ||
| Toxicity characteristic leaching procedure | 1 | 0 | 0 | ||
| Annual whole sludge application rate | 1 | 0 | 0 | ||
| Ann. amt sludge disposed by other method | 1 | 0 | 0 | ||
| Annual amt of sludge incinerated | 1 | 0 | 0 | ||
| Annual sludge production, total | 1 | 0 | 0 | ||
| Annual amount of sludge land applied | 1 | 0 | 0 | ||
| Annual amt. sludge disposed surface unit | 1 | 0 | 0 | ||
| Annual amt sludge disposed in landfill | 1 | 0 | 0 | ||
| Annual amt sludge transported interstate | 1 | 0 | 0 | ||
| Unit w/liner/leachate collection system | 1 | 0 | 0 | ||
| Compliance w/part 258 sludge requirement | 1 | 0 | 0 | ||
| Boundary areas | 1 | 0 | 0 | ||
| Salmonella | 1 | 0 | 0 | ||
| Pollutant table from 503.13 | 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 |
|---|---|---|
| January 15, 2026 | Permit Violations - Violation Specified in Comment | ST6 |
| February 8, 2017 | Permit Violations - Violation Specified in Comment | 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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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.