Velarion Records
Follow this permit Velarion Records emails you this permit’s record, cited to the public filing, and tells you when the register changes it. Free.
One more press on the next page sends it; there is no link to click in an email. The continuous daily watch on every change is the paid alert. Unsubscribe any time.
Also free: The Pay Desk, the weekly executive pay briefing.

Clean Water Act discharge permit · NPDES TX0007013

EXXONMOBIL BAYTOWN CHEMICAL PLANT, Baytown, TX: NPDES TX0007013 discharge permit, effluent exceedances, inspections, penalties

EXXONMOBIL BAYTOWN CHEMICAL PLANT, held by EXXON MOBILCORPORATION, holds NPDES permit TX0007013, which discharges to Nine-Foot Diameter Pipe. EPA’s file records it issued December 21, 2015 and expiring August 1, 2018.

EXXONMOBIL BAYTOWN CHEMICAL PLANT, Baytown, Texas: Individual permit TX0007013, held by EXXON MOBILCORPORATION; Administratively continued (past its expiration date and still in force until reissued); issued December 21, 2015, term to August 1, 2018; discharges to NINE-FOOT DIAMETER PIPE.

  • Solids, total suspended: 2 limits, 10 violations of any kind, 10 effluent exceedances, latest August 31, 2025, largest 296% over the limit.
  • pH: 6 limits, 24 violations of any kind, 9 effluent exceedances, latest December 31, 2023.
  • Oil & Grease: 3 limits, 16 violations of any kind, 7 effluent exceedances, latest November 30, 2019, largest 38,488% over the limit.
  • Benzo[a]pyrene: 2 limits, 5 violations of any kind, 5 effluent exceedances, latest December 31, 2018, largest 567% over the limit.
  • Phenanthrene: 2 limits, 5 violations of any kind, 5 effluent exceedances, latest December 31, 2018, largest 178% over the limit.
  • Benzo[a]anthracene: 2 limits, 5 violations of any kind, 5 effluent exceedances, latest December 31, 2018, largest 567% over the limit.
  • Hexachlorobenzene: 2 limits, 5 violations of any kind, 5 effluent exceedances, latest December 31, 2018, largest 38,362% over the limit.
  • Carbon, tot organic [TOC]: 3 limits, 10 violations of any kind, 4 effluent exceedances, latest August 31, 2025, largest 87% over the limit.
  • Toluene: 2 limits, 4 violations of any kind, 4 effluent exceedances, latest July 31, 2007, largest 30,507% over the limit.
  • Zinc, total [as Zn]: 2 limits, 7 violations of any kind, 3 effluent exceedances, latest August 31, 2025, largest 267% over the limit.
  • Acrylonitrile: 2 limits, 3 violations of any kind, 3 effluent exceedances, latest December 31, 2018, largest 127% over the limit.
  • Trichloroethylene: 2 limits, 3 violations of any kind, 3 effluent exceedances, latest July 31, 2007, largest 450% over the limit.
  • Copper, total [as Cu]: 2 limits, 6 violations of any kind, 2 effluent exceedances, latest August 31, 2025, largest 60% over the limit.
  • Ethylbenzene: 2 limits, 1 violation of any kind, 1 effluent exceedance, latest July 31, 2006, largest 111% over the limit.
  • Hexachlorobutadiene: 2 limits, 1 violation of any kind, 1 effluent exceedance, latest June 30, 2015, largest 49% over the limit.
  • Discharge event observation [Visual Monitoring]: 1 limit, 27 violations of any kind, 0 effluent exceedances.
  • Flow, in conduit or thru treatment plant: 6 limits, 12 violations of any kind, 0 effluent exceedances.
  • Xylene [mix of m+o+p]: 1 limit, 1 violation of any kind, 0 effluent exceedances.
  • BOD, 5-day, 20 deg. C: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Carbon tetrachloride: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • 1,2-Dichloroethane: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Chloroform: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Benzene: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Acenaphthylene: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Acenaphthene: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Anthracene: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Benzo[b]fluoranthene: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Benzo[k]fluoranthene: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Chlorobenzene: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Chrysene: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Diethyl phthalate: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Dimethyl phthalate: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Fluoranthene: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Fluorene: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Hexachloroethane: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Methyl chloride [Chloromethane]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Methylene chloride: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Nitrobenzene: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Pyrene: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Tetrachloroethylene: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • 1,1-Dichloroethane: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • 1,1-Dichloroethylene: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • 1,1,1-Trichloroethane: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • 1,1,2-Trichloroethane: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • 1,2-Dichlorobenzene: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • 1,2-Dichloropropane: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • trans-1,2-Dichloroethylene: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • 1,2,4-Trichlorobenzene: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • 1,3-Dichlorobenzene: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • 1,4-Dichlorobenzene: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • 2-Nitrophenol: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • 2,4-Dimethylphenol: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • 2,4-Dinitrophenol: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • 4-Nitrophenol: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • 4,6-Dinitro-o-cresol: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Phenol: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Naphthalene: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Di[2-ethylhexyl] phthalate [DEHP]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Di-n-butyl phthalate: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Vinyl chloride: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • November 4, 2025: Permit Violations - Violation Specified in Comment (ST6).

EXXONMOBIL BAYTOWN CHEMICAL PLANT among its neighbors

Its county holds 4,455, 195 of them major permits; TX0007013 is a minor permit.

Other permits in the county

  • 019-HOU3-22 HOUSTON CONCRETE SILOS, Houston: TXR1594NZ, minor permit, discharging to HOUSTON SHIP CHANNEL/BUFFALO BAYOU TIDAL, permit term to March 4, 2028
  • 04868-1000 TOMBALL SAMS CLUB, Tomball: TXR1507VM, minor permit, discharging to WILLOW CREEK, permit term to March 4, 2028
  • 04868-1000 TOMBALL SAMS CLUB, Tomball: TXR1563VQ, minor permit, discharging to WILLOW CREEK, permit term to March 4, 2028
  • 10 055SF SHELL, Katy: TXR1598RM, minor permit, discharging to SOUTH MAYDE CREEK, permit term to March 4, 2028
  • 10.1 ACRES ATASCOCITA RD, Humble: TXR1501OH, minor permit, discharging to GARNERS BAYOU, permit term to March 4, 2028
  • 105 FARISH CIRCLE, Houston: TXR1583PJ, minor permit, discharging to BUFFALO BAYOU TIDAL, permit term to March 4, 2028
  • 10910 GLEN HOLLOW, Houston: TXR1588SI, minor permit, discharging to SIMS BAYOU ABOVE TIDAL, permit term to March 4, 2028
  • 1105 DEMOLITION, Houston: TXR1588SX, minor permit, discharging to RUMMEL CREEK, permit term to March 4, 2028
  • 1111 FANNIN, Houston: TXR1556LZ, minor permit, permit term to March 4, 2028
  • 11116 BELLAIRE BLVD, Houston: TXR1516PK, minor permit, discharging to BRAYS BAYOU ABOVE TIDAL, permit term to March 4, 2028

Identity

Facility as filedEXXONMOBIL BAYTOWN CHEMICAL PLANT
Permittee as filedEXXON MOBILCORPORATION
NPDES IDTX0007013
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedDecember 21, 2015
Expiration dateAugust 1, 2018
AddressBaytown, TX 77520
Receiving waterNINE-FOOT DIAMETER PIPE
SIC2869 – Industrial Organic Chemicals
Other EPA IDs (FRS)RCRA handler TXD980625966; ICIS-AIR source TX0000004820100014

Effluent limits and exceedances

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 62 are shown.

Pollutant or measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Solids, total suspended21010August 31, 2025296% over the limit
pH6249December 31, 2023
Oil & Grease3167November 30, 201938,488% over the limit
Benzo[a]pyrene255December 31, 2018567% over the limit
Phenanthrene255December 31, 2018178% over the limit
Benzo[a]anthracene255December 31, 2018567% over the limit
Hexachlorobenzene255December 31, 201838,362% over the limit
Carbon, tot organic [TOC]3104August 31, 202587% over the limit
Toluene244July 31, 200730,507% over the limit
Zinc, total [as Zn]273August 31, 2025267% over the limit
Acrylonitrile233December 31, 2018127% over the limit
Trichloroethylene233July 31, 2007450% over the limit
Copper, total [as Cu]262August 31, 202560% over the limit
Ethylbenzene211July 31, 2006111% over the limit
Hexachlorobutadiene211June 30, 201549% over the limit
Discharge event observation [Visual Monitoring]1270
Flow, in conduit or thru treatment plant6120
Xylene [mix of m+o+p]110
BOD, 5-day, 20 deg. C200
Carbon tetrachloride200
1,2-Dichloroethane200
Chloroform200
Benzene200
Acenaphthylene200
Acenaphthene200
Anthracene200
Benzo[b]fluoranthene200
Benzo[k]fluoranthene200
Chlorobenzene200
Chrysene200
Diethyl phthalate200
Dimethyl phthalate200
Fluoranthene200
Fluorene200
Hexachloroethane200
Methyl chloride [Chloromethane]200
Methylene chloride200
Nitrobenzene200
Pyrene200
Tetrachloroethylene200
1,1-Dichloroethane200
1,1-Dichloroethylene200
1,1,1-Trichloroethane200
1,1,2-Trichloroethane200
1,2-Dichlorobenzene200
1,2-Dichloropropane200
trans-1,2-Dichloroethylene200
1,2,4-Trichlorobenzene200
1,3-Dichlorobenzene200
1,4-Dichlorobenzene200
2-Nitrophenol200
2,4-Dimethylphenol200
2,4-Dinitrophenol200
4-Nitrophenol200
4,6-Dinitro-o-cresol200
Phenol200
Naphthalene200
Di[2-ethylhexyl] phthalate [DEHP]200
Di-n-butyl phthalate200
Vinyl chloride200

Inspections, violations and enforcement

DateWhat EPA recordedAgency
November 4, 2025Permit Violations - Violation Specified in CommentST6

Inspections

EPA’s inspection file holds no inspection for NPDES TX0007013.

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 TX0007013.

Watch this permit

One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, TX0007013.

Start the watch

How often?
  • One permit holder — $99/month
  • One watershed — $2,990/year
  • One state — $4,990/year
  • The whole register — $18,000/year

How we handle your data → Privacy

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

What this page shows

This public-records page covers NPDES permit TX0007013 for the EXXONMOBIL BAYTOWN CHEMICAL PLANT in Baytown, TX, held by EXXON MOBILCORPORATION, which discharges to Nine-Foot Diameter Pipe. The permit, a minor discharger class permit, is administratively continued and lists 62 pollutants under a numeric limit and 15 pollutants with an effluent exceedance.