Clean Water Act discharge permit · NPDES TX0006068
IVN PROPYLENE, Houston, TX: NPDES TX0006068 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 82Pollutants under a numeric limit
- 12Pollutants with an effluent exceedance
IVN PROPYLENE, held by INV PROPYLENE LLC, holds NPDES permit TX0006068, which discharges to Unnamed Drainage Ditch On Adjacent Property;Sims B. EPA’s file records it issued March 21, 2018 and expiring September 1, 2022. 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 | IVN PROPYLENE |
|---|---|
| Permittee as filed | INV PROPYLENE LLC |
| NPDES ID | TX0006068 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | March 21, 2018 |
| Expiration date | September 1, 2022 |
| Address | Houston, TX 77017 |
| Receiving water | UNNAMED DRAINAGE DITCH ON ADJACENT PROPERTY;SIMS B |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Lower Sims Bayou (HUC 120401040502) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 84Pollutants on file
- 82Under a numeric limit
- 79With a violation of any kind
- 12With 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 84 are shown.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Copper, total [as Cu] | 4 | 21 | 17 | March 31, 2026 | 100% over the limit |
| Solids, total suspended | 4 | 21 | 9 | March 31, 2023 | 199% over the limit |
| pH | 6 | 20 | 6 | June 30, 2023 | |
| Oil & Grease | 4 | 15 | 6 | December 31, 2020 | 804% over the limit |
| Chlorine, total residual | 2 | 10 | 6 | March 31, 2026 | 800% over the limit |
| Cyanide, free [as free] | 0 | 4 | 4 | July 31, 2026 | 239% over the limit |
| Benzene | 3 | 23 | 3 | June 30, 2026 | 100% over the limit |
| Cyanide, free [amenable to chlorination] | 4 | 90 | 2 | April 30, 2014 | 116% over the limit |
| Di-n-butyl phthalate | 3 | 22 | 2 | March 31, 2022 | 58% over the limit |
| pH range excursions, > 60 minutes | 1 | 10 | 2 | February 28, 2025 | 2,147,483,650% over the limit |
| Flow, in conduit or thru treatment plant | 6 | 21 | 1 | February 28, 2011 | 10% over the limit |
| Fluoranthene | 3 | 20 | 1 | May 31, 2011 | 91% over the limit |
| Hexachlorobenzene | 6 | 20 | 0 | ||
| Carbon tetrachloride | 3 | 20 | 0 | ||
| 1,2-Dichloroethane | 3 | 20 | 0 | ||
| Toluene | 3 | 20 | 0 | ||
| Acrylonitrile | 3 | 20 | 0 | ||
| Anthracene | 3 | 20 | 0 | ||
| Benzo[k]fluoranthene | 3 | 20 | 0 | ||
| Chlorobenzene | 3 | 20 | 0 | ||
| Diethyl phthalate | 3 | 20 | 0 | ||
| Dimethyl phthalate | 3 | 20 | 0 | ||
| Hexachlorobutadiene | 3 | 20 | 0 | ||
| Hexachloroethane | 3 | 20 | 0 | ||
| Methyl chloride [Chloromethane] | 3 | 20 | 0 | ||
| Methylene chloride | 3 | 20 | 0 | ||
| Nitrobenzene | 3 | 20 | 0 | ||
| Tetrachloroethylene | 3 | 20 | 0 | ||
| 1,1-Dichloroethane | 3 | 20 | 0 | ||
| 1,1-Dichloroethylene | 3 | 20 | 0 | ||
| 1,1,1-Trichloroethane | 3 | 20 | 0 | ||
| 1,1,2-Trichloroethane | 3 | 20 | 0 | ||
| Benzo[a]anthracene | 3 | 20 | 0 | ||
| 1,2-Dichlorobenzene | 3 | 20 | 0 | ||
| 1,2-Dichloropropane | 3 | 20 | 0 | ||
| trans-1,2-Dichloroethylene | 3 | 20 | 0 | ||
| 1,2,4-Trichlorobenzene | 3 | 20 | 0 | ||
| 1,3-Dichlorobenzene | 3 | 20 | 0 | ||
| 1,4-Dichlorobenzene | 3 | 20 | 0 | ||
| 2-Nitrophenol | 3 | 20 | 0 | ||
| 2,4-Dimethylphenol | 3 | 20 | 0 | ||
| 2,4-Dinitrophenol | 3 | 20 | 0 | ||
| 4-Nitrophenol | 3 | 20 | 0 | ||
| 4,6-Dinitro-o-cresol | 3 | 20 | 0 | ||
| Phenol | 3 | 20 | 0 | ||
| Naphthalene | 3 | 20 | 0 | ||
| Di[2-ethylhexyl] phthalate [DEHP] | 3 | 20 | 0 | ||
| Vinyl chloride | 3 | 20 | 0 | ||
| Trichloroethylene | 3 | 20 | 0 | ||
| 1,3-Dichloropropylene | 3 | 20 | 0 | ||
| Chloroethane | 3 | 20 | 0 | ||
| Benzo[a]pyrene | 6 | 19 | 0 | ||
| Acenaphthylene | 3 | 19 | 0 | ||
| Acenaphthene | 3 | 19 | 0 | ||
| Chrysene | 3 | 19 | 0 | ||
| Ethylbenzene | 3 | 19 | 0 | ||
| Fluorene | 3 | 19 | 0 | ||
| Phenanthrene | 3 | 19 | 0 | ||
| Pyrene | 3 | 19 | 0 | ||
| 3,4-Benzofluoranthene | 3 | 19 | 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 |
|---|---|---|
| December 10, 2025 | 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.