Clean Water Act discharge permit · NPDES TX0006483
FREEPORT TEXAS OPERATIONS, Freeport, TX: NPDES TX0006483 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 93Pollutants under a numeric limit
- 19Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
FREEPORT TEXAS OPERATIONS, held by DOW CHEMICAL COMPANY (THE), holds NPDES permit TX0006483, which discharges to Seg No 1201 Brazos River Basin. EPA’s file records it issued May 23, 2011 and expiring July 1, 2014.
FREEPORT TEXAS OPERATIONS, Freeport, Texas: Individual permit TX0006483, held by DOW CHEMICAL COMPANY (THE); Administratively continued (past its expiration date and still in force until reissued); issued May 23, 2011, term to July 1, 2014; discharges to SEG NO 1201 BRAZOS RIVER BASIN.
- Solids, total suspended: 12 limits, 26 violations of any kind, 25 effluent exceedances, latest December 31, 2025, largest 393% over the limit.
- Total purgeable halocarbons: 22 limits, 25 violations of any kind, 21 effluent exceedances, latest March 31, 2026, largest 30,580% over the limit.
- Carbon, tot organic [TOC]: 25 limits, 17 violations of any kind, 10 effluent exceedances, latest September 30, 2025, largest 292% over the limit.
- Copper, total [as Cu]: 6 limits, 7 violations of any kind, 5 effluent exceedances, latest May 31, 2019, largest 53% over the limit.
- Chloroform: 12 limits, 16 violations of any kind, 4 effluent exceedances, latest August 31, 2024, largest 84% over the limit.
- BOD, 5-day, 20 deg. C: 12 limits, 4 violations of any kind, 4 effluent exceedances, latest February 29, 2016, largest 99,999% over the limit.
- 1,2-Dichloropropane: 12 limits, 14 violations of any kind, 2 effluent exceedances, latest March 31, 2004, largest 245% over the limit.
- Vinyl chloride: 12 limits, 14 violations of any kind, 2 effluent exceedances, latest March 31, 2005, largest 235% over the limit.
- 1,3-Dichloropropylene: 11 limits, 14 violations of any kind, 2 effluent exceedances, latest March 31, 2004, largest 314% over the limit.
- Flow, in conduit or thru treatment plant: 32 limits, 4 violations of any kind, 2 effluent exceedances, latest August 31, 2017, largest 12% over the limit.
- 2,3,7,8-Tetrachlorodibenzo-p-dioxin: 4 limits, 2 violations of any kind, 2 effluent exceedances, latest June 30, 2008, largest 1,142% over the limit.
- pH range excursions, > 60 minutes: 3 limits, 2 violations of any kind, 2 effluent exceedances, latest December 31, 2020, largest 2,147,483,650% over the limit.
- Tetrachloroethylene: 12 limits, 13 violations of any kind, 1 effluent exceedance, latest March 31, 2004, largest 42% over the limit.
- 1,2-Dichloroethane: 12 limits, 7 violations of any kind, 1 effluent exceedance, latest February 28, 2011, largest 121% over the limit.
- pH: 6 limits, 3 violations of any kind, 1 effluent exceedance, latest June 30, 2019.
- Zinc, total [as Zn]: 4 limits, 1 violation of any kind, 1 effluent exceedance, latest December 31, 2004, largest 2% over the limit.
- Phenolics, total recoverable: 4 limits, 1 violation of any kind, 1 effluent exceedance, latest October 31, 2005, largest 298% over the limit.
- Nitrogen, organic total [as N]: 2 limits, 1 violation of any kind, 1 effluent exceedance, latest October 31, 2021, largest 29% over the limit.
- Phenols: 0 limits, 1 violation of any kind, 1 effluent exceedance, latest February 28, 2017, largest 153% over the limit.
- Carbon tetrachloride: 12 limits, 16 violations of any kind, 0 effluent exceedances.
- Hexachlorobenzene: 16 limits, 14 violations of any kind, 0 effluent exceedances.
- Phenol: 14 limits, 12 violations of any kind, 0 effluent exceedances.
- Toluene: 12 limits, 12 violations of any kind, 0 effluent exceedances.
- Chlorobenzene: 12 limits, 12 violations of any kind, 0 effluent exceedances.
- Hexachloroethane: 12 limits, 12 violations of any kind, 0 effluent exceedances.
- Methyl chloride [Chloromethane]: 12 limits, 12 violations of any kind, 0 effluent exceedances.
- Methylene chloride: 12 limits, 12 violations of any kind, 0 effluent exceedances.
- 1,1,1-Trichloroethane: 12 limits, 12 violations of any kind, 0 effluent exceedances.
- 1,1,2-Trichloroethane: 12 limits, 12 violations of any kind, 0 effluent exceedances.
- 1,2-Dichlorobenzene: 12 limits, 12 violations of any kind, 0 effluent exceedances.
- 1,3-Dichlorobenzene: 12 limits, 12 violations of any kind, 0 effluent exceedances.
- 1,4-Dichlorobenzene: 12 limits, 12 violations of any kind, 0 effluent exceedances.
- Trichloroethylene: 12 limits, 12 violations of any kind, 0 effluent exceedances.
- Chloroethane: 12 limits, 12 violations of any kind, 0 effluent exceedances.
- Ethylbenzene: 11 limits, 12 violations of any kind, 0 effluent exceedances.
- Acenaphthylene: 10 limits, 12 violations of any kind, 0 effluent exceedances.
- Acenaphthene: 10 limits, 12 violations of any kind, 0 effluent exceedances.
- Acrylonitrile: 10 limits, 12 violations of any kind, 0 effluent exceedances.
- Anthracene: 10 limits, 12 violations of any kind, 0 effluent exceedances.
- Benzo[k]fluoranthene: 10 limits, 12 violations of any kind, 0 effluent exceedances.
- Benzo[a]pyrene: 10 limits, 12 violations of any kind, 0 effluent exceedances.
- Chrysene: 10 limits, 12 violations of any kind, 0 effluent exceedances.
- Diethyl phthalate: 10 limits, 12 violations of any kind, 0 effluent exceedances.
- Dimethyl phthalate: 10 limits, 12 violations of any kind, 0 effluent exceedances.
- Fluoranthene: 10 limits, 12 violations of any kind, 0 effluent exceedances.
- Fluorene: 10 limits, 12 violations of any kind, 0 effluent exceedances.
- Hexachlorobutadiene: 10 limits, 12 violations of any kind, 0 effluent exceedances.
- Nitrobenzene: 10 limits, 12 violations of any kind, 0 effluent exceedances.
- Phenanthrene: 10 limits, 12 violations of any kind, 0 effluent exceedances.
- Pyrene: 10 limits, 12 violations of any kind, 0 effluent exceedances.
- 1,1-Dichloroethylene: 10 limits, 12 violations of any kind, 0 effluent exceedances.
- Benzo[a]anthracene: 10 limits, 12 violations of any kind, 0 effluent exceedances.
- trans-1,2-Dichloroethylene: 10 limits, 12 violations of any kind, 0 effluent exceedances.
- 1,2,4-Trichlorobenzene: 10 limits, 12 violations of any kind, 0 effluent exceedances.
- 2-Nitrophenol: 10 limits, 12 violations of any kind, 0 effluent exceedances.
- 2,4-Dimethylphenol: 10 limits, 12 violations of any kind, 0 effluent exceedances.
- 2,4-Dinitrophenol: 10 limits, 12 violations of any kind, 0 effluent exceedances.
- 4-Nitrophenol: 10 limits, 12 violations of any kind, 0 effluent exceedances.
- 4,6-Dinitro-o-cresol: 10 limits, 12 violations of any kind, 0 effluent exceedances.
- Naphthalene: 10 limits, 12 violations of any kind, 0 effluent exceedances.
- May 20, 2025: Permit Violations - Violation Specified in Comment (ST6).
- June 22, 2023: Permit Violations - Violation Specified in Comment (ST6).
Other permits held by DOW CHEMICAL COMPANY (THE)
- DOW CHEMICAL LA PORTE SITE, La Porte: TX0002933, issued March 24, 2014
FREEPORT TEXAS OPERATIONS among its neighbors
EPA’s permit file holds 9 discharge permits in the Brazos River-Gulf of Mexico subwatershed (HUC 120701040505), TX0006483 among them. Its county holds 522, 24 of them major permits; TX0006483 is a major permit.
Other permits in the Brazos River-Gulf of Mexico subwatershed (HUC 120701040505)
- BAR X RANCH, Angelton: TXR1501PN, minor permit, discharging to BRAZOS RIVER BASIN, permit term to March 4, 2028
- BRAZOS RIVER DIVERSION CHANNEL PIPELINE REPLACEMENT, Freeport: TXR1568PE, minor permit, discharging to BRAZOS RIVER, permit term to March 4, 2028
- BRAZOSPORT WATER AUTHORITY PLANT, Lake Jackson: TX0135887, minor permit, discharging to BRAZOS RIVER, permit term to July 30, 2024
- CHEVRON PHILLIPS CHEMICAL SWEENY OLD OCEAN PLANT, Sweeny: TX0135917, major permit, discharging to UNNAMED TRIB;LITTLE ILINNVILLE BAYOU, permit term to August 28, 2024
- CITY OF FREEPORT CENTRAL WWTP, Freeport: TX0033332, major permit, discharging to Brazos River Tidal, permit term to May 8, 2025
- CITY OF LAKE JACKSON WWTP, Lake Jackson: TX0025798, major permit, discharging to Brazos River Tidal, permit term to August 14, 2024
- HMSS PLANT - LAKE JACKSON, Lake Jackson: TXR05GU26, minor permit, permit term to August 13, 2026
- SWEENY REFINERY AND PETROCHEMICAL COMPLEX, Sweeny: TX0007536, major permit, discharging to LINNVILLE BAYOU/CANEY CREEK, permit term to July 1, 2019
Identity
| Facility as filed | FREEPORT TEXAS OPERATIONS |
|---|---|
| Permittee as filed | DOW CHEMICAL COMPANY (THE) |
| NPDES ID | TX0006483 |
| 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 | May 23, 2011 |
| Expiration date | July 1, 2014 |
| Address | Freeport, TX 77536 |
| Receiving water | SEG NO 1201 BRAZOS RIVER BASIN |
| Subwatershed | Brazos River-Gulf of Mexico (HUC 120701040505) |
| SIC | 2869 – Industrial Organic Chemicals |
| Other EPA IDs (FRS) | RCRA handler TXD008092793; ICIS-AIR source TX0000004803900041 |
Effluent limits and exceedances
- 94Pollutants on file
- 93Under a numeric limit
- 84With a violation of any kind
- 19With 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 94 are shown.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Solids, total suspended | 12 | 26 | 25 | December 31, 2025 | 393% over the limit |
| Total purgeable halocarbons | 22 | 25 | 21 | March 31, 2026 | 30,580% over the limit |
| Carbon, tot organic [TOC] | 25 | 17 | 10 | September 30, 2025 | 292% over the limit |
| Copper, total [as Cu] | 6 | 7 | 5 | May 31, 2019 | 53% over the limit |
| Chloroform | 12 | 16 | 4 | August 31, 2024 | 84% over the limit |
| BOD, 5-day, 20 deg. C | 12 | 4 | 4 | February 29, 2016 | 99,999% over the limit |
| 1,2-Dichloropropane | 12 | 14 | 2 | March 31, 2004 | 245% over the limit |
| Vinyl chloride | 12 | 14 | 2 | March 31, 2005 | 235% over the limit |
| 1,3-Dichloropropylene | 11 | 14 | 2 | March 31, 2004 | 314% over the limit |
| Flow, in conduit or thru treatment plant | 32 | 4 | 2 | August 31, 2017 | 12% over the limit |
| 2,3,7,8-Tetrachlorodibenzo-p-dioxin | 4 | 2 | 2 | June 30, 2008 | 1,142% over the limit |
| pH range excursions, > 60 minutes | 3 | 2 | 2 | December 31, 2020 | 2,147,483,650% over the limit |
| Tetrachloroethylene | 12 | 13 | 1 | March 31, 2004 | 42% over the limit |
| 1,2-Dichloroethane | 12 | 7 | 1 | February 28, 2011 | 121% over the limit |
| pH | 6 | 3 | 1 | June 30, 2019 | |
| Zinc, total [as Zn] | 4 | 1 | 1 | December 31, 2004 | 2% over the limit |
| Phenolics, total recoverable | 4 | 1 | 1 | October 31, 2005 | 298% over the limit |
| Nitrogen, organic total [as N] | 2 | 1 | 1 | October 31, 2021 | 29% over the limit |
| Phenols | 0 | 1 | 1 | February 28, 2017 | 153% over the limit |
| Carbon tetrachloride | 12 | 16 | 0 | ||
| Hexachlorobenzene | 16 | 14 | 0 | ||
| Phenol | 14 | 12 | 0 | ||
| Toluene | 12 | 12 | 0 | ||
| Chlorobenzene | 12 | 12 | 0 | ||
| Hexachloroethane | 12 | 12 | 0 | ||
| Methyl chloride [Chloromethane] | 12 | 12 | 0 | ||
| Methylene chloride | 12 | 12 | 0 | ||
| 1,1,1-Trichloroethane | 12 | 12 | 0 | ||
| 1,1,2-Trichloroethane | 12 | 12 | 0 | ||
| 1,2-Dichlorobenzene | 12 | 12 | 0 | ||
| 1,3-Dichlorobenzene | 12 | 12 | 0 | ||
| 1,4-Dichlorobenzene | 12 | 12 | 0 | ||
| Trichloroethylene | 12 | 12 | 0 | ||
| Chloroethane | 12 | 12 | 0 | ||
| Ethylbenzene | 11 | 12 | 0 | ||
| Acenaphthylene | 10 | 12 | 0 | ||
| Acenaphthene | 10 | 12 | 0 | ||
| Acrylonitrile | 10 | 12 | 0 | ||
| Anthracene | 10 | 12 | 0 | ||
| Benzo[k]fluoranthene | 10 | 12 | 0 | ||
| Benzo[a]pyrene | 10 | 12 | 0 | ||
| Chrysene | 10 | 12 | 0 | ||
| Diethyl phthalate | 10 | 12 | 0 | ||
| Dimethyl phthalate | 10 | 12 | 0 | ||
| Fluoranthene | 10 | 12 | 0 | ||
| Fluorene | 10 | 12 | 0 | ||
| Hexachlorobutadiene | 10 | 12 | 0 | ||
| Nitrobenzene | 10 | 12 | 0 | ||
| Phenanthrene | 10 | 12 | 0 | ||
| Pyrene | 10 | 12 | 0 | ||
| 1,1-Dichloroethylene | 10 | 12 | 0 | ||
| Benzo[a]anthracene | 10 | 12 | 0 | ||
| trans-1,2-Dichloroethylene | 10 | 12 | 0 | ||
| 1,2,4-Trichlorobenzene | 10 | 12 | 0 | ||
| 2-Nitrophenol | 10 | 12 | 0 | ||
| 2,4-Dimethylphenol | 10 | 12 | 0 | ||
| 2,4-Dinitrophenol | 10 | 12 | 0 | ||
| 4-Nitrophenol | 10 | 12 | 0 | ||
| 4,6-Dinitro-o-cresol | 10 | 12 | 0 | ||
| Naphthalene | 10 | 12 | 0 |
Inspections, violations and enforcement
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| May 20, 2025 | Permit Violations - Violation Specified in Comment | ST6 |
| June 22, 2023 | Permit Violations - Violation Specified in Comment | ST6 |
Inspections
EPA’s inspection file holds no inspection for NPDES TX0006483.
Formal enforcement and penalties
0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.
Informal enforcement
EPA’s informal enforcement file holds no action for NPDES TX0006483.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.