Clean Water Act discharge permit · NPDES TXR05FG40

BAYTOWN OLEFINS PLANT, Baytown, TX: NPDES TXR05FG40 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
12Pollutants under a numeric limit
1Pollutants with an effluent exceedance

BAYTOWN OLEFINS PLANT, held by Exxon Mobil Corporation, holds NPDES permit TXR05FG40. EPA’s file records it issued November 11, 2021 and expiring August 13, 2026. 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	BAYTOWN OLEFINS PLANT
Permittee as filed	Exxon Mobil Corporation
NPDES ID	TXR05FG40
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Program	Industrial stormwater
Issued	November 11, 2021
Expiration date	August 13, 2026
Address	Baytown, TX 77520
Subwatershed	Goose Creek-Frontal Galveston Bay (HUC 120401040706)
Other EPA IDs (FRS)	RCRA handler TXD980625966; ICIS-AIR source TX0000004820100014

Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.

Effluent limits and exceedances

12Pollutants on file
12Under a numeric limit
1With a violation of any kind
1With 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.

Pollutant or measure	Limits	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
Manganese, total [as Mn]	14	2	2	December 31, 2023	31% over the limit
Arsenic, total [as As]	14	0	0
Barium, total [as Ba]	14	0	0
Cadmium, total [as Cd]	14	0	0
Chromium, total [as Cr]	14	0	0
Copper, total [as Cu]	14	0	0
Lead, total [as Pb]	14	0	0
Nickel, total [as Ni]	14	0	0
Silver, total [as Ag]	14	0	0
Zinc, total [as Zn]	14	0	0
Selenium, total [as Se]	14	0	0
Mercury, total [as Hg]	14	0	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

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES TXR05FG40.

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.

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, TXR05FG40.

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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID TXR05FG40 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

This public-records page covers NPDES permit TXR05FG40 for the BAYTOWN OLEFINS PLANT in Baytown, TX, held by Exxon Mobil Corporation, which EPA's file shows as administratively continued and classed as a Minor discharger. The page lists 12 as the discharger class, 1 pollutant under a numeric limit, and 1 pollutant with an effluent exceedance.