Clean Water Act discharge permit · NPDES LA0124931

CHALMETTE GAS PROCESSING PLANT, Chalmette, LA: NPDES LA0124931 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
5Pollutants under a numeric limit
2Pollutants with an effluent exceedance

CHALMETTE GAS PROCESSING PLANT, held by LONE STAR NGL REFINERY SERVICES LLC, holds NPDES permit LA0124931. EPA’s file records it issued April 25, 2016 and expiring May 31, 2021. 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	CHALMETTE GAS PROCESSING PLANT
Permittee as filed	LONE STAR NGL REFINERY SERVICES LLC
NPDES ID	LA0124931
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	April 25, 2016
Expiration date	May 31, 2021
Address	Chalmette, LA 70043
Receiving water impaired	303(D) Listed
Subwatershed	Forty Arpent Canal-Bayou Terre Aux Boeufs (HUC 080902030501)
Other EPA IDs (FRS)	RCRA handler LAR000043711; ICIS-AIR source LA0000002208700055

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

Effluent limits and exceedances

5Pollutants on file
5Under a numeric limit
2With 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
pH	2	3	1	September 30, 2017
Oxygen demand, chem. [high level] [COD]	1	1	1	June 30, 2019	52% over the limit
Flow, in conduit or thru treatment plant	2	0	0
Oil & Grease	1	0	0
Carbon, tot organic [TOC]	1	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 LA0124931.

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.

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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 LA0124931 there.

Nearby on the register

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

This public-records page covers Clean Water Act NPDES permit LA0124931 for the CHALMETTE GAS PROCESSING PLANT in Chalmette, LA, held by LONE STAR NGL REFINERY SERVICES LLC, with a permit status of administratively continued and a discharger class of Minor. The page lists 5 as the discharger class figure, 2 pollutants under a numeric limit, and 2 pollutants with an effluent exceedance. The permit was issued April 25, 2016 and expired May 31, 2021, and the status shown reflects EPA's permit file as loaded on September 15, 2026.