NPDES TX0005592 · Clean Water Act
HUNTSMAN CONROE PLANT, Conroe, TX: NPDES TX0005592 discharge permit, effluent exceedances, inspections, penalties
HUNTSMAN CONROE PLANT, Conroe, Texas: Individual permit TX0005592, held by HUNTSMAN PETROCHEMICAL LLC; Administratively continued; issued November 26, 2018, term to November 26, 2021; discharges to WEST FORK CRYSTAL CK;W FORT SAN JACINTO RV.
- Solids, total suspended: 7 limits, 17 violations of any kind, 17 effluent exceedances, latest July 31, 2025, largest 162% over the limit.
- Phenol: 7 limits, 30 violations of any kind, 14 effluent exceedances, latest September 30, 2012, largest 158% over the limit.
- BOD, carbonaceous [5 day, 20 C]: 4 limits, 11 violations of any kind, 11 effluent exceedances, latest February 28, 2023, largest 207% over the limit.
- Flow, in conduit or thru treatment plant: 4 limits, 16 violations of any kind, 8 effluent exceedances, latest September 30, 2019, largest 42% over the limit.
- Sulfate, total [as SO4]: 4 limits, 8 violations of any kind, 8 effluent exceedances, latest January 31, 2024, largest 63% over the limit.
- Hexachlorobenzene: 7 limits, 27 violations of any kind, 7 effluent exceedances, latest August 31, 2024, largest 21,400% over the limit.
- Chrysene: 7 limits, 26 violations of any kind, 6 effluent exceedances, latest August 31, 2008, largest 10,650% over the limit.
- Benzo[a]anthracene: 7 limits, 26 violations of any kind, 6 effluent exceedances, latest August 31, 2008, largest 10,650% over the limit.
- pH: 4 limits, 8 violations of any kind, 6 effluent exceedances, latest August 31, 2020.
- Oil & Grease: 5 limits, 7 violations of any kind, 6 effluent exceedances, latest January 31, 2024, largest 258% over the limit.
- Whole Effluent Toxicity [WET] - C. dubia: 0 limits, 6 violations of any kind, 6 effluent exceedances, latest June 30, 2026, largest 99,999% over the limit.
- Benzo[a]pyrene: 7 limits, 25 violations of any kind, 5 effluent exceedances, latest August 31, 2024, largest 10,650% over the limit.
- Cyanide, free [amenable to chlorination]: 3 limits, 9 violations of any kind, 5 effluent exceedances, latest March 31, 2009, largest 94% over the limit.
- BOD, 5-day, 20 deg. C: 3 limits, 5 violations of any kind, 5 effluent exceedances, latest August 31, 2021, largest 343% over the limit.
- Nickel, total [as Ni]: 7 limits, 4 violations of any kind, 4 effluent exceedances, latest February 29, 2012, largest 52% over the limit.
- Oxygen demand, chem. [high level] [COD]: 4 limits, 4 violations of any kind, 4 effluent exceedances, latest April 30, 2008, largest 106% over the limit.
- Di[2-ethylhexyl] phthalate [DEHP]: 7 limits, 27 violations of any kind, 3 effluent exceedances, latest August 31, 2016, largest 2,401% over the limit.
- Hexachloroethane: 7 limits, 23 violations of any kind, 3 effluent exceedances, latest August 31, 2008, largest 233% over the limit.
- 2,4-Dinitrophenol: 7 limits, 23 violations of any kind, 3 effluent exceedances, latest August 31, 2007, largest 142% over the limit.
- Nitrogen, ammonia total [as N]: 4 limits, 3 violations of any kind, 3 effluent exceedances, latest March 31, 2018, largest 45% over the limit.
- 1,2-Dichloroethane: 7 limits, 26 violations of any kind, 2 effluent exceedances, latest August 31, 2025, largest 115,996% over the limit.
- Hexachlorobutadiene: 7 limits, 22 violations of any kind, 2 effluent exceedances, latest August 31, 2007, largest 70% over the limit.
- 1,1-Dichloroethylene: 7 limits, 22 violations of any kind, 2 effluent exceedances, latest August 31, 2007, largest 105% over the limit.
- 2-Nitrophenol: 7 limits, 22 violations of any kind, 2 effluent exceedances, latest August 31, 2007, largest 70% over the limit.
- 4-Nitrophenol: 7 limits, 22 violations of any kind, 2 effluent exceedances, latest August 31, 2007, largest 139% over the limit.
- Chlorobenzene: 7 limits, 18 violations of any kind, 2 effluent exceedances, latest August 31, 2007, largest 126% over the limit.
- 1,4-Dichlorobenzene: 7 limits, 18 violations of any kind, 2 effluent exceedances, latest August 31, 2007, largest 126% over the limit.
- Copper, total [as Cu]: 4 limits, 10 violations of any kind, 2 effluent exceedances, latest October 31, 2011, largest 82% over the limit.
- Acenaphthylene: 7 limits, 21 violations of any kind, 1 effluent exceedance, latest August 31, 2007, largest 54% over the limit.
- Acenaphthene: 7 limits, 21 violations of any kind, 1 effluent exceedance, latest August 31, 2007, largest 54% over the limit.
- Anthracene: 7 limits, 21 violations of any kind, 1 effluent exceedance, latest August 31, 2007, largest 54% over the limit.
- Benzo[k]fluoranthene: 7 limits, 21 violations of any kind, 1 effluent exceedance, latest August 31, 2007, largest 54% over the limit.
- Dimethyl phthalate: 7 limits, 21 violations of any kind, 1 effluent exceedance, latest August 31, 2007, largest 79% over the limit.
- Fluoranthene: 7 limits, 21 violations of any kind, 1 effluent exceedance, latest August 31, 2007, largest 34% over the limit.
- Fluorene: 7 limits, 21 violations of any kind, 1 effluent exceedance, latest August 31, 2007, largest 54% over the limit.
- Methylene chloride: 7 limits, 21 violations of any kind, 1 effluent exceedance, latest August 31, 2007, largest 76% over the limit.
- Nitrobenzene: 7 limits, 21 violations of any kind, 1 effluent exceedance, latest August 31, 2007, largest 23% over the limit.
- Phenanthrene: 7 limits, 21 violations of any kind, 1 effluent exceedance, latest August 31, 2007, largest 54% over the limit.
- Pyrene: 7 limits, 21 violations of any kind, 1 effluent exceedance, latest August 31, 2007, largest 34% over the limit.
- 1,1-Dichloroethane: 7 limits, 21 violations of any kind, 1 effluent exceedance, latest August 31, 2007, largest 54% over the limit.
- 2-Chlorophenol: 7 limits, 21 violations of any kind, 1 effluent exceedance, latest August 31, 2007, largest 7% over the limit.
- 2,4-Dimethylphenol: 7 limits, 21 violations of any kind, 1 effluent exceedance, latest August 31, 2007, largest 87% over the limit.
- 4,6-Dinitro-o-cresol: 7 limits, 21 violations of any kind, 1 effluent exceedance, latest August 31, 2007, largest 120% over the limit.
- Di-n-butyl phthalate: 7 limits, 21 violations of any kind, 1 effluent exceedance, latest August 31, 2007, largest 23% over the limit.
- Chloroethane: 7 limits, 21 violations of any kind, 1 effluent exceedance, latest August 31, 2007, largest 65% over the limit.
- Carbon tetrachloride: 7 limits, 17 violations of any kind, 1 effluent exceedance, latest August 31, 2007, largest 87% over the limit.
- Chloroform: 7 limits, 17 violations of any kind, 1 effluent exceedance, latest August 31, 2007, largest 59% over the limit.
- Toluene: 7 limits, 17 violations of any kind, 1 effluent exceedance, latest August 31, 2007, largest 1,203% over the limit.
- Acrylonitrile: 7 limits, 17 violations of any kind, 1 effluent exceedance, latest August 31, 2007, largest 79% over the limit.
- Benzo[b]fluoranthene: 7 limits, 17 violations of any kind, 1 effluent exceedance, latest August 31, 2007, largest 48% over the limit.
- Ethylbenzene: 7 limits, 17 violations of any kind, 1 effluent exceedance, latest August 31, 2007, largest 5% over the limit.
- Tetrachloroethylene: 7 limits, 17 violations of any kind, 1 effluent exceedance, latest August 31, 2007, largest 54% over the limit.
- 1,1,1-Trichloroethane: 7 limits, 17 violations of any kind, 1 effluent exceedance, latest August 31, 2007, largest 59% over the limit.
- 1,1,2-Trichloroethane: 7 limits, 17 violations of any kind, 1 effluent exceedance, latest August 31, 2007, largest 59% over the limit.
- trans-1,2-Dichloroethylene: 7 limits, 17 violations of any kind, 1 effluent exceedance, latest August 31, 2007, largest 59% over the limit.
- 1,3-Dichlorobenzene: 7 limits, 17 violations of any kind, 1 effluent exceedance, latest August 31, 2007, largest 7% over the limit.
- Naphthalene: 7 limits, 17 violations of any kind, 1 effluent exceedance, latest August 31, 2007, largest 54% over the limit.
- Trichloroethylene: 7 limits, 17 violations of any kind, 1 effluent exceedance, latest August 31, 2007, largest 59% over the limit.
- 1,3-Dichloropropylene: 7 limits, 9 violations of any kind, 1 effluent exceedance, latest August 31, 2007, largest 16% over the limit.
- Solids, total dissolved: 4 limits, 1 violation of any kind, 1 effluent exceedance, latest September 30, 2001, largest 21% over the limit.
- February 3, 2021: Permit Violations - Violation Specified in Comment (ST6).
HUNTSMAN CONROE PLANT among its neighbors
96 discharge permits are in the Crystal Creek subwatershed (HUC 120401010403); TX0005592 is one. Its county: 1,439, 16 major; TX0005592 is major permit.
Other permits in the Crystal Creek subwatershed (HUC 120401010403)
- A-1 HOMES, Conroe: TXR1568OC, minor, term to 2028-03-04
- AMERITEX HDPE, Conroe: TXR1564QZ, minor, term to 2028-03-04
- ARCOSA CONROE, Conroe: TXR1577YT, minor, term to 2028-03-04
- ASM - WILLIS, Willis: TXR05GQ72, minor, term to 2026-08-13
- BRIGHT MORNING STAR PLACE, Conroe: TXR1522TI, minor, term to 2028-03-04
- BUILDERS FIRSTSOURCE TRUSS PLANT CNS, Conroe: TXR1598MF, minor, term to 2028-03-04
- CANEY MILLS PHASE 3 DETENTION & MASS GRADING, Conroe: TXR1523OI, minor, term to 2028-03-04
- CANEY MILLS SEC 9, Conroe: TXR1503YN, minor, term to 2028-03-04
- CANEY MILLS SUBDIVISION, Conroe: TXR1555EK, minor, term to 2023-03-04
- CANEY MILLS SUBDIVISION, Conroe: TXR1591OC, minor, term to 2028-03-04
Identity
| Facility | HUNTSMAN CONROE PLANT |
|---|---|
| Permittee | HUNTSMAN PETROCHEMICAL LLC |
| NPDES ID | TX0005592 |
| Status | Administratively continued |
| Type | Individual permit |
| Class | Major |
| Facility type | Non-POTW |
| Issued | November 26, 2018 |
| Expires | November 26, 2021 |
| Address | Conroe, TX 77301 |
| Receiving water | WEST FORK CRYSTAL CK;W FORT SAN JACINTO RV |
| Subwatershed | Crystal Creek (HUC 120401010403) |
| SIC | 2869 – Industrial Organic Chemicals |
| Other EPA IDs (FRS) | RCRA handler TXD008076853; ICIS-AIR source TX0000004833900005 |
NPDES TX0005592: effluent limits and exceedances
HUNTSMAN CONROE PLANT (NPDES TX0005592): 94 pollutants on file, 91 limited; 90 with a violation of any kind, 61 with an exceedance.
The 60 with the most exceedances of the 94 on file for NPDES TX0005592. How exceedances are counted.
| Pollutant | Limits | Violations | Exceedances | Latest | Largest, as filed |
|---|---|---|---|---|---|
| Solids, total suspended | 7 | 17 | 17 | July 31, 2025 | 162% over the limit |
| Phenol | 7 | 30 | 14 | September 30, 2012 | 158% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 11 | 11 | February 28, 2023 | 207% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 16 | 8 | September 30, 2019 | 42% over the limit |
| Sulfate, total [as SO4] | 4 | 8 | 8 | January 31, 2024 | 63% over the limit |
| Hexachlorobenzene | 7 | 27 | 7 | August 31, 2024 | 21,400% over the limit |
| Chrysene | 7 | 26 | 6 | August 31, 2008 | 10,650% over the limit |
| Benzo[a]anthracene | 7 | 26 | 6 | August 31, 2008 | 10,650% over the limit |
| pH | 4 | 8 | 6 | August 31, 2020 | |
| Oil & Grease | 5 | 7 | 6 | January 31, 2024 | 258% over the limit |
| Whole Effluent Toxicity [WET] - C. dubia | 0 | 6 | 6 | June 30, 2026 | 99,999% over the limit |
| Benzo[a]pyrene | 7 | 25 | 5 | August 31, 2024 | 10,650% over the limit |
| Cyanide, free [amenable to chlorination] | 3 | 9 | 5 | March 31, 2009 | 94% over the limit |
| BOD, 5-day, 20 deg. C | 3 | 5 | 5 | August 31, 2021 | 343% over the limit |
| Nickel, total [as Ni] | 7 | 4 | 4 | February 29, 2012 | 52% over the limit |
| Oxygen demand, chem. [high level] [COD] | 4 | 4 | 4 | April 30, 2008 | 106% over the limit |
| Di[2-ethylhexyl] phthalate [DEHP] | 7 | 27 | 3 | August 31, 2016 | 2,401% over the limit |
| Hexachloroethane | 7 | 23 | 3 | August 31, 2008 | 233% over the limit |
| 2,4-Dinitrophenol | 7 | 23 | 3 | August 31, 2007 | 142% over the limit |
| Nitrogen, ammonia total [as N] | 4 | 3 | 3 | March 31, 2018 | 45% over the limit |
| 1,2-Dichloroethane | 7 | 26 | 2 | August 31, 2025 | 115,996% over the limit |
| Hexachlorobutadiene | 7 | 22 | 2 | August 31, 2007 | 70% over the limit |
| 1,1-Dichloroethylene | 7 | 22 | 2 | August 31, 2007 | 105% over the limit |
| 2-Nitrophenol | 7 | 22 | 2 | August 31, 2007 | 70% over the limit |
| 4-Nitrophenol | 7 | 22 | 2 | August 31, 2007 | 139% over the limit |
| Chlorobenzene | 7 | 18 | 2 | August 31, 2007 | 126% over the limit |
| 1,4-Dichlorobenzene | 7 | 18 | 2 | August 31, 2007 | 126% over the limit |
| Copper, total [as Cu] | 4 | 10 | 2 | October 31, 2011 | 82% over the limit |
| Acenaphthylene | 7 | 21 | 1 | August 31, 2007 | 54% over the limit |
| Acenaphthene | 7 | 21 | 1 | August 31, 2007 | 54% over the limit |
| Anthracene | 7 | 21 | 1 | August 31, 2007 | 54% over the limit |
| Benzo[k]fluoranthene | 7 | 21 | 1 | August 31, 2007 | 54% over the limit |
| Dimethyl phthalate | 7 | 21 | 1 | August 31, 2007 | 79% over the limit |
| Fluoranthene | 7 | 21 | 1 | August 31, 2007 | 34% over the limit |
| Fluorene | 7 | 21 | 1 | August 31, 2007 | 54% over the limit |
| Methylene chloride | 7 | 21 | 1 | August 31, 2007 | 76% over the limit |
| Nitrobenzene | 7 | 21 | 1 | August 31, 2007 | 23% over the limit |
| Phenanthrene | 7 | 21 | 1 | August 31, 2007 | 54% over the limit |
| Pyrene | 7 | 21 | 1 | August 31, 2007 | 34% over the limit |
| 1,1-Dichloroethane | 7 | 21 | 1 | August 31, 2007 | 54% over the limit |
| 2-Chlorophenol | 7 | 21 | 1 | August 31, 2007 | 7% over the limit |
| 2,4-Dimethylphenol | 7 | 21 | 1 | August 31, 2007 | 87% over the limit |
| 4,6-Dinitro-o-cresol | 7 | 21 | 1 | August 31, 2007 | 120% over the limit |
| Di-n-butyl phthalate | 7 | 21 | 1 | August 31, 2007 | 23% over the limit |
| Chloroethane | 7 | 21 | 1 | August 31, 2007 | 65% over the limit |
| Carbon tetrachloride | 7 | 17 | 1 | August 31, 2007 | 87% over the limit |
| Chloroform | 7 | 17 | 1 | August 31, 2007 | 59% over the limit |
| Toluene | 7 | 17 | 1 | August 31, 2007 | 1,203% over the limit |
| Acrylonitrile | 7 | 17 | 1 | August 31, 2007 | 79% over the limit |
| Benzo[b]fluoranthene | 7 | 17 | 1 | August 31, 2007 | 48% over the limit |
| Ethylbenzene | 7 | 17 | 1 | August 31, 2007 | 5% over the limit |
| Tetrachloroethylene | 7 | 17 | 1 | August 31, 2007 | 54% over the limit |
| 1,1,1-Trichloroethane | 7 | 17 | 1 | August 31, 2007 | 59% over the limit |
| 1,1,2-Trichloroethane | 7 | 17 | 1 | August 31, 2007 | 59% over the limit |
| trans-1,2-Dichloroethylene | 7 | 17 | 1 | August 31, 2007 | 59% over the limit |
| 1,3-Dichlorobenzene | 7 | 17 | 1 | August 31, 2007 | 7% over the limit |
| Naphthalene | 7 | 17 | 1 | August 31, 2007 | 54% over the limit |
| Trichloroethylene | 7 | 17 | 1 | August 31, 2007 | 59% over the limit |
| 1,3-Dichloropropylene | 7 | 9 | 1 | August 31, 2007 | 16% over the limit |
| Solids, total dissolved | 4 | 1 | 1 | September 30, 2001 | 21% over the limit |
NPDES TX0005592: inspections, violations and enforcement
NPDES TX0005592: 1 single-event violation
| Date | What EPA recorded | Agency |
|---|---|---|
| February 3, 2021 | Permit Violations - Violation Specified in Comment | ST6 |
NPDES TX0005592 (HUNTSMAN CONROE PLANT): no inspection, formal enforcement action and informal enforcement action on file.
Watch NPDES TX0005592
NPDES TX0005592: one email when its EPA record changes — $99/month.
Permits near NPDES TX0005592
NPDES TX0005592: 94 pollutant rows, 1 dated events; ICIS-NPDES download, loaded October 14, 2026.