Clean Water Act discharge permit · NPDES TX0092282
SOUTHWEST SHIPYARD, Channelview, TX: NPDES TX0092282 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 48Pollutants under a numeric limit
- 23Pollutants with an effluent exceedance
SOUTHWEST SHIPYARD, held by SOUTHWEST SHIPYARD, L.P., holds NPDES permit TX0092282, which discharges to Houston Ship Channel/San Jacinto Rv. EPA’s file records it issued November 26, 2018 and expiring November 26, 2021. 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 | SOUTHWEST SHIPYARD |
|---|---|
| Permittee as filed | SOUTHWEST SHIPYARD, L.P. |
| NPDES ID | TX0092282 |
| 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 | November 26, 2018 |
| Expiration date | November 26, 2021 |
| Address | Channelview, TX 77530 |
| Receiving water | HOUSTON SHIP CHANNEL/SAN JACINTO RV |
| Subwatershed | Highlands Reservoir-San Jacinto River (HUC 120401040705) |
| SIC | 3731 – Ship Building And Repairing |
| Other EPA IDs (FRS) | RCRA handler TXD000820274; ICIS-AIR source TX0000004820100826 |
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
- 80Pollutants on file
- 48Under a numeric limit
- 78With a violation of any kind
- 23With 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; the 60 with the most exceedances of 80 are shown.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Solids, total suspended | 23 | 404 | 97 | December 31, 2023 | 340% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 104 | 72 | March 31, 2026 | 680% over the limit |
| Nickel, total [as Ni] | 8 | 149 | 38 | April 30, 2024 | 883% over the limit |
| Silver, total [as Ag] | 4 | 79 | 23 | January 31, 2010 | 2,289% over the limit |
| Nitrogen, ammonia total [as N] | 4 | 58 | 16 | March 31, 2023 | 317% over the limit |
| Oxygen, dissolved [DO] | 1 | 23 | 15 | November 30, 2008 | 95% over the limit |
| Enterococci | 3 | 17 | 15 | June 30, 2026 | 11,043% over the limit |
| Chlorine, total residual | 2 | 21 | 13 | November 30, 2014 | 100% over the limit |
| Oxygen demand, chem. [high level] [COD] | 5 | 60 | 10 | April 30, 2020 | 1,173% over the limit |
| Cyanide, total [as CN] | 0 | 27 | 9 | January 31, 2009 | 26,216% over the limit |
| Phenols | 1 | 35 | 8 | November 30, 2006 | 280% over the limit |
| Copper, total [as Cu] | 7 | 109 | 5 | April 30, 2024 | 219% over the limit |
| Oil & Grease | 8 | 106 | 5 | April 30, 2021 | 67% over the limit |
| Whole effluent toxicity | 0 | 10 | 4 | September 30, 2018 | 25% over the limit |
| Hydrocarbons, petroleum | 4 | 4 | 4 | August 31, 2023 | 767% over the limit |
| Acetophenone | 0 | 23 | 3 | March 31, 2026 | 263% over the limit |
| Cyanide, free available | 4 | 17 | 3 | April 30, 2026 | 53% over the limit |
| pH | 10 | 136 | 2 | December 31, 2008 | |
| Flow, in conduit or thru treatment plant | 10 | 132 | 2 | April 30, 2007 | 248% over the limit |
| Mercury, total [as Hg] | 4 | 56 | 2 | May 31, 2021 | 159% over the limit |
| Benzene, ethylbenzene, toluene, xylene combination | 4 | 48 | 2 | September 30, 2016 | 90% over the limit |
| Petrol hydrocarbons, total recoverable | 4 | 61 | 1 | March 31, 2005 | 227% over the limit |
| Chromium, total [as Cr] | 2 | 32 | 1 | August 31, 2006 | 1,970% over the limit |
| Zinc, total [as Zn] | 6 | 105 | 0 | ||
| Arsenic, total [as As] | 4 | 88 | 0 | ||
| Phenanthrene | 4 | 52 | 0 | ||
| Polynuclear Aromatic Hydrocarbons [PAHs] | 4 | 44 | 0 | ||
| Cadmium, total [as Cd] | 2 | 34 | 0 | ||
| Chromium, hexavalent [as Cr] | 1 | 28 | 0 | ||
| Selenium, total [as Se] | 2 | 26 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia | 2 | 26 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Menidia menidia | 2 | 26 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia | 2 | 26 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia | 2 | 24 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 2 | 24 | 0 | ||
| Lead, total [as Pb] | 2 | 23 | 0 | ||
| Sulfide, total [as S] | 2 | 22 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 2 | 22 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 2 | 22 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 2 | 22 | 0 | ||
| Cobalt, total [as Co] | 0 | 20 | 0 | ||
| Tin, total [as Sn] | 0 | 20 | 0 | ||
| Butyl benzyl phthalate | 0 | 20 | 0 | ||
| Fluoranthene | 0 | 20 | 0 | ||
| 2,4,6-Trichlorophenol | 0 | 20 | 0 | ||
| Di[2-ethylhexyl] phthalate [DEHP] | 0 | 20 | 0 | ||
| Pyridine | 0 | 20 | 0 | ||
| p-Cresol | 0 | 20 | 0 | ||
| n-Decane | 0 | 20 | 0 | ||
| Carbazole | 0 | 20 | 0 | ||
| n-Octadecane | 0 | 20 | 0 | ||
| 2-Butanone | 0 | 20 | 0 | ||
| o-Cresol [2-Methylphenol] | 0 | 20 | 0 | ||
| Acetone | 0 | 20 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 2 | 16 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 2 | 16 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidia | 2 | 14 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidia | 2 | 14 | 0 | ||
| Benzene | 1 | 11 | 0 | ||
| Naphthalene | 1 | 11 | 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 |
|---|---|---|
| June 15, 2022 | 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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Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.