Clean Water Act discharge permit · NPDES TX0068781

OXBOW CALCINING PLANT, Port Arthur, TX: NPDES TX0068781 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
10Pollutants under a numeric limit
2Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

OXBOW CALCINING PLANT, held by OXBOW CALCINING LLC, holds NPDES permit TX0068781, which discharges to West Turning Basin;Sabine Neches Canal Tidal. EPA’s file records it issued October 11, 2018 and expiring October 11, 2023.

OXBOW CALCINING PLANT, Port Arthur, Texas: Individual permit TX0068781, held by OXBOW CALCINING LLC; Administratively continued (past its expiration date and still in force until reissued); issued October 11, 2018, term to October 11, 2023; discharges to WEST TURNING BASIN;SABINE NECHES CANAL TIDAL.

Solids, total suspended: 12 limits, 32 violations of any kind, 4 effluent exceedances, latest June 30, 2025, largest 52% over the limit.
pH: 8 limits, 27 violations of any kind, 1 effluent exceedance, latest December 31, 2008.
BOD, 5-day, 20 deg. C: 10 limits, 26 violations of any kind, 0 effluent exceedances.
Flow, in conduit or thru treatment plant: 8 limits, 26 violations of any kind, 0 effluent exceedances.
Copper, total [as Cu]: 6 limits, 26 violations of any kind, 0 effluent exceedances.
Zinc, total [as Zn]: 6 limits, 26 violations of any kind, 0 effluent exceedances.
Chlorine, total residual: 6 limits, 26 violations of any kind, 0 effluent exceedances.
Carbon, tot organic [TOC]: 2 limits, 6 violations of any kind, 0 effluent exceedances.
Enterococci: 8 limits, 0 violations of any kind, 0 effluent exceedances.
Temperature, water deg. fahrenheit: 1 limit, 0 violations of any kind, 0 effluent exceedances.

June 12, 2025: Permit Violations - Violation Specified in Comment (ST6).
March 29, 2022: Permit Violations - Violation Specified in Comment (ST6).

OXBOW CALCINING PLANT among its neighbors

EPA’s permit file holds 124 discharge permits in the Salt Bayou subwatershed (HUC 120402010300), TX0068781 among them. Its county holds 302, 16 of them major permits; TX0068781 is a minor permit.

Other permits in the Salt Bayou subwatershed (HUC 120402010300)

A-1 AUTO AND TRUCK SALVAGE, Beaumont: TXR05FT84, minor permit, permit term to August 13, 2026
BARGE DISCHARGE, Port Arthur: TXG670629, minor permit, permit term to April 4, 2030
BASF BEAUMONT ARGO PLANT, Beaumont: TX0003671, minor permit, discharging to Taylor Bayou Above Tidal, permit term to November 13, 2023
BECHTEL TEMP CBP SITE, Port Arthur: TXG114146, minor permit, permit term to November 6, 2026
BIG HILL STRATEGIC PETROLEUM RESERVE, Winnie: TX0092827, minor permit, permit term to January 31, 2024
BOBBY BS RV PARK, Beaumont: TXR1573UW, minor permit, discharging to RODAIR GULLY LATERAL 5, permit term to March 4, 2028
CAMIN CARGO CONTROL MAGELLAN- GALENA PARK, Galena Park: TXRNECJ66, minor permit, permit term to August 13, 2026
CAMIN CARGO CONTROL NEDERLAND, Nederland: TXR05GN34, minor permit, permit term to August 13, 2026
CANAL AND WETLAND HDD DISCHARGE, Port Arthur: TXG670633, minor permit, permit term to April 4, 2030
CHEVRON PHILLIPS CHEMICAL PORT ARTHUR TERMINAL, Port Arthur: TX0124249, minor permit, discharging to WEST TURNING BASIN OF SABINE-NECHES CANAL, permit term to January 29, 2024

Identity

Facility as filed	OXBOW CALCINING PLANT
Permittee as filed	OXBOW CALCINING LLC
NPDES ID	TX0068781
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	October 11, 2018
Expiration date	October 11, 2023
Address	Port Arthur, TX 77640
Receiving water	WEST TURNING BASIN;SABINE NECHES CANAL TIDAL
Subwatershed	Salt Bayou (HUC 120402010300)
SIC	2999 – Petroleum And Coal Products
Other EPA IDs (FRS)	RCRA handler TXD008094153; ICIS-AIR source TX0000004824500023

Effluent limits and exceedances

10Pollutants on file
10Under a numeric limit
8With a violation of any kind
2With 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
Solids, total suspended	12	32	4	June 30, 2025	52% over the limit
pH	8	27	1	December 31, 2008
BOD, 5-day, 20 deg. C	10	26	0
Flow, in conduit or thru treatment plant	8	26	0
Copper, total [as Cu]	6	26	0
Zinc, total [as Zn]	6	26	0
Chlorine, total residual	6	26	0
Carbon, tot organic [TOC]	2	6	0
Enterococci	8	0	0
Temperature, water deg. fahrenheit	1	0	0

Inspections, violations and enforcement

2Single-event violations

Date	What EPA recorded	Agency
June 12, 2025	Permit Violations - Violation Specified in Comment	ST6
March 29, 2022	Permit Violations - Violation Specified in Comment	ST6

Inspections

EPA’s inspection file holds no inspection for NPDES TX0068781.

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 TX0068781.

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

This public-records page covers Clean Water Act NPDES permit TX0068781 for the OXBOW CALCINING PLANT in Port Arthur, TX, held by OXBOW CALCINING LLC, with a status of administratively continued. The permit is classed as a minor discharger, with 10 pollutants under a numeric limit and 2 pollutants with an effluent exceedance, and it discharges to WEST TURNING BASIN;SABINE NECHES CANAL TIDAL in the Salt Bayou subwatershed (HUC 120402010300).