Clean Water Act discharge permit · NPDES TX0030228

LYONDELL CHEMICAL BAYPORT CHOATE PLANT, Pasadena, TX: NPDES TX0030228 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
5Pollutants under a numeric limit
3Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

LYONDELL CHEMICAL BAYPORT CHOATE PLANT, held by LYONDELL CHEMICAL COMPANY, holds NPDES permit TX0030228, which discharges to Hcfcdd A104-13, Taylor Bayou, Taylor Lk. EPA’s file records it issued December 4, 2018 and expiring December 4, 2023.

LYONDELL CHEMICAL BAYPORT CHOATE PLANT, Pasadena, Texas: Individual permit TX0030228, held by LYONDELL CHEMICAL COMPANY; Administratively continued (past its expiration date and still in force until reissued); issued December 4, 2018, term to December 4, 2023; discharges to HCFCDD A104-13, TAYLOR BAYOU, TAYLOR LK.

Carbon, tot organic [TOC]: 3 limits, 9 violations of any kind, 7 effluent exceedances, latest March 31, 2026, largest 1,058% over the limit.
pH: 6 limits, 8 violations of any kind, 4 effluent exceedances, latest August 31, 2024.
Zinc, total [as Zn]: 0 limits, 5 violations of any kind, 4 effluent exceedances, latest August 31, 2017, largest 79% over the limit.
Solids, total suspended: 3 limits, 21 violations of any kind, 0 effluent exceedances.
Flow, in conduit or thru treatment plant: 6 limits, 4 violations of any kind, 0 effluent exceedances.
Oil & Grease: 3 limits, 2 violations of any kind, 0 effluent exceedances.

Other permits held by LYONDELL CHEMICAL COMPANY

LYONDELL CHEMICAL CHANNELVIEW, Channelview: TX0069493, issued January 11, 2017

LYONDELL CHEMICAL BAYPORT CHOATE PLANT among its neighbors

EPA’s permit file holds 560 discharge permits in the Clear Creek-Frontal Galveston Bay subwatershed (HUC 120402040100), TX0030228 among them. Its county holds 4,455, 195 of them major permits; TX0030228 is a minor permit.

Other permits in the Clear Creek-Frontal Galveston Bay subwatershed (HUC 120402040100)

10 PUBLIC SANITARY SEWER RELOCATION PLANS FOR EDG, Seabrook: TXR1567OE, minor permit, discharging to TAYLOR LAKE, permit term to March 4, 2028
11806 PORT ROAD, Seabrook: TXR1501PX, minor permit, discharging to BAYPORT CHANNEL, permit term to March 4, 2028
3223-01 HMCL MOB3 - ASC, Houston: TXR1557VH, minor permit, discharging to CLEAR LAKE, permit term to March 4, 2028
34 ACRES EGRET BAY MASS GRADING, League City: TXR1555QU, minor permit, discharging to ROBINSON BAYOU, permit term to March 4, 2028
4 HORN PROPERTIES, Pasadena: TXR1565VB, minor permit, discharging to MIDDLE BAYOU, permit term to March 4, 2028
42 WL FROM CLCWA WP 3 TO LEAGUE CITY BOOSTER PUMP STATION, Webster: TXR1580WY, minor permit, discharging to COW BAYOU, permit term to March 4, 2028
541 WATER SYSTEM, Alvin: TX0141623, minor permit, discharging to DETENTION BASIN CHIGGER CRK;CLEAR CREEK, permit term to July 8, 2027
6951 MCHARD RD--JOJES CAPITAL, Houston: TXR1545QD, minor permit, discharging to CLEAR CREEK ABOVE TIDAL, permit term to March 4, 2028
A SCHULMAN, La Porte: TX0111350, minor permit, discharging to UNNAMED DITCH; TAYLOR BAYOU, permit term to August 1, 2021
ACC HOU - MCHARD, Fresno: TXR05GQ82, minor permit, permit term to August 13, 2026

Identity

Facility as filed	LYONDELL CHEMICAL BAYPORT CHOATE PLANT
Permittee as filed	LYONDELL CHEMICAL COMPANY
NPDES ID	TX0030228
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	December 4, 2018
Expiration date	December 4, 2023
Address	Pasadena, TX 77507
Receiving water	HCFCDD A104-13, TAYLOR BAYOU, TAYLOR LK
Subwatershed	Clear Creek-Frontal Galveston Bay (HUC 120402040100)
SIC	2869 – Industrial Organic Chemicals
Other EPA IDs (FRS)	RCRA handler TXD058265067; ICIS-AIR source TX0000004820100477

Effluent limits and exceedances

6Pollutants on file
5Under a numeric limit
6With a violation of any kind
3With 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
Carbon, tot organic [TOC]	3	9	7	March 31, 2026	1,058% over the limit
pH	6	8	4	August 31, 2024
Zinc, total [as Zn]	0	5	4	August 31, 2017	79% over the limit
Solids, total suspended	3	21	0
Flow, in conduit or thru treatment plant	6	4	0
Oil & Grease	3	2	0

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES TX0030228.

Inspections

EPA’s inspection file holds no inspection for NPDES TX0030228.

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 TX0030228.

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

This public-records page covers the NPDES discharge permit TX0030228 for the Lyondell Chemical Bayport Choate Plant in Pasadena, TX, held by Lyondell Chemical Company, which discharges to Hcfcdd A104-13, Taylor Bayou, Taylor Lk within the Clear Creek-Frontal Galveston Bay (HUC 120402040100) subwatershed. The permit is listed as administratively continued, with 3 pollutants under a numeric limit and 3 pollutants with an effluent exceedance, as of October 14, 2026.