Clean Water Act discharge permit · NPDES TX0020389
ROBSTOWN WWTF, Robstown, TX: NPDES TX0020389 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 49Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
ROBSTOWN WWTF, held by ROBSTOWN, CITY OF, holds NPDES permit TX0020389, which discharges to Cayo Deloso. EPA’s file records it issued October 7, 2015 and expiring June 1, 2020. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | ROBSTOWN WWTF |
|---|---|
| Permittee as filed | ROBSTOWN, CITY OF |
| NPDES ID | TX0020389 |
| 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 | October 7, 2015 |
| Expiration date | June 1, 2020 |
| Address | Robstown, TX 78380 |
| Receiving water | CAYO DELOSO |
| Subwatershed | West Oso Creek-Oso Creek (HUC 121102020102) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 49Pollutants on file
- 49Under a numeric limit
- 48With 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 |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 3 | 55 | 31 | May 31, 2026 | 277% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 3 | 45 | 9 | May 31, 2026 | 99,999% over the limit |
| Cyanide, free [amenable to chlorination] | 3 | 40 | 4 | July 31, 2026 | 2,827% over the limit |
| E. coli | 2 | 8 | 4 | November 30, 2024 | 537% over the limit |
| Solids, total suspended | 3 | 32 | 2 | October 31, 2011 | 28% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 63 | 1 | March 31, 2003 | 438% over the limit |
| Polychlorinated biphenyls [PCBs] | 1 | 6 | 1 | July 31, 2010 | 70% over the limit |
| Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex | 2 | 38 | 0 | ||
| LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas | 2 | 38 | 0 | ||
| NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex | 2 | 38 | 0 | ||
| NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas | 2 | 36 | 0 | ||
| LOAEC Lethal Static Renewal 48HR Acute Daphnia pulex | 2 | 32 | 0 | ||
| LOAEC Lethal Survival Static Renewal 48Hr Acute Pimephales promelas | 2 | 32 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 5 | 27 | 0 | ||
| Arsenic, dry weight | 5 | 24 | 0 | ||
| pH | 3 | 23 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 21 | 0 | ||
| Selenium, dry weight | 3 | 18 | 0 | ||
| Copper, dry weight | 3 | 18 | 0 | ||
| Cadmium, dry weight | 3 | 18 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 18 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 18 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 3 | 18 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 18 | 0 | ||
| Chlorine, total residual | 2 | 18 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 10 | 0 | ||
| Vector attraction reduction alternative used | 2 | 9 | 0 | ||
| Level of pathogen requirements achieved | 2 | 8 | 0 | ||
| Description of pathogen option used | 2 | 8 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute D. Pulex | 1 | 8 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Pimephales promelas | 1 | 8 | 0 | ||
| Nickel, total [as Ni] | 2 | 6 | 0 | ||
| Toxicity characteristic leaching procedure | 1 | 6 | 0 | ||
| Annual amt sludge disposed in landfill | 1 | 6 | 0 | ||
| Annual amt sludge transported interstate | 1 | 6 | 0 | ||
| Pollutant table from 503.13 | 1 | 6 | 0 | ||
| Fecal coliform | 1 | 5 | 0 | ||
| Ann. amt sludge disposed by other method | 1 | 5 | 0 | ||
| Annual amt of sludge incinerated | 1 | 5 | 0 | ||
| Annual sludge production, total | 1 | 5 | 0 | ||
| Annual amount of sludge land applied | 1 | 5 | 0 | ||
| Annual amt. sludge disposed surface unit | 1 | 5 | 0 | ||
| Salmonella | 1 | 5 | 0 | ||
| Compliance w/part 258 sludge requirement | 1 | 4 | 0 | ||
| Unit w/liner/leachate collection system | 1 | 3 | 0 | ||
| Boundary areas | 1 | 3 | 0 | ||
| Whole effluent toxicity - retest #1 | 3 | 1 | 0 | ||
| Whole effluent toxicity - retest #2 | 3 | 1 | 0 | ||
| Annual whole sludge application rate | 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
- 5Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| April 30, 2026 | Permit Violations - Violation Specified in Comment | ST6 |
| January 30, 2025 | Permit Violations - Violation Specified in Comment | ST6 |
| July 26, 2023 | Permit Violations - Violation Specified in Comment | ST6 |
| September 19, 2018 | Permit Violations - Violation Specified in Comment | ST6 |
| June 20, 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 15, 2026.