Clean Water Act discharge permit · NPDES TX0100935
GREENS BAYOU FABRICATION YARD, Harris County, TX: NPDES TX0100935 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 14Pollutants under a numeric limit
- 9Pollutants with an effluent exceedance
GREENS BAYOU FABRICATION YARD, held by UNDINE TEXAS ENVIRONMENATL LLC, holds NPDES permit TX0100935, which discharges to Greens Bayou Portion Of Houston Ship Channel Tidal. EPA’s file records it issued September 6, 2018 and expiring September 6, 2023. 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 | GREENS BAYOU FABRICATION YARD |
|---|---|
| Permittee as filed | UNDINE TEXAS ENVIRONMENATL LLC |
| NPDES ID | TX0100935 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | September 6, 2018 |
| Expiration date | September 6, 2023 |
| Address | Harris County, TX 77015 |
| Receiving water | GREENS BAYOU PORTION OF HOUSTON SHIP CHANNEL TIDAL |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Lower Greens Bayou (HUC 120401040606) |
| SIC | 3731 – Ship Building And Repairing |
| Other EPA IDs (FRS) | RCRA handler TXD000803031; ICIS-AIR source TX0000004820100198 |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 15Pollutants on file
- 14Under a numeric limit
- 14With a violation of any kind
- 9With 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] | 4 | 61 | 49 | January 31, 2026 | 287% over the limit |
| Enterococci | 2 | 36 | 34 | January 31, 2026 | 99,999% over the limit |
| Solids, total suspended | 2 | 27 | 19 | January 31, 2025 | 80% over the limit |
| Copper, total [as Cu] | 2 | 27 | 17 | April 30, 2019 | 375% over the limit |
| Silver, total [as Ag] | 2 | 43 | 11 | December 31, 2020 | 104% over the limit |
| Zinc, total [as Zn] | 3 | 6 | 6 | April 30, 2025 | 555% over the limit |
| Flow, in conduit or thru treatment plant | 2 | 13 | 5 | August 31, 2019 | 56% over the limit |
| pH | 2 | 12 | 4 | December 31, 2023 | |
| Oil & Grease | 1 | 8 | 4 | March 31, 2025 | 156% over the limit |
| Chlorine, total residual | 2 | 14 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 0 | 12 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 2 | 10 | 0 | ||
| Oxygen demand, chem. [high level] [COD] | 1 | 6 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 4 | 0 | ||
| BOD, 5-day, 20 deg. C | 2 | 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 |
|---|---|---|
| April 3, 2024 | 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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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 TX0100935 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.