Clean Water Act discharge permit · NPDES LA0050962

SHELL CHEMICAL LP- NORCO-CYPRESS SITE, Norco, LA: NPDES LA0050962 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MajorDischarger class
68Pollutants under a numeric limit
0Pollutants with an effluent exceedance

SHELL CHEMICAL LP- NORCO-CYPRESS SITE, held by SHELL CHEMICAL LP-NORCO CYPRES, holds NPDES permit LA0050962, which discharges to Bayou Trepagnier. EPA’s file records it issued December 1, 2003 and expiring January 31, 2009. 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	SHELL CHEMICAL LP- NORCO-CYPRESS SITE
Permittee as filed	SHELL CHEMICAL LP-NORCO CYPRES
NPDES ID	LA0050962
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Major discharger
Facility type	Not a publicly owned treatment works
Issued	December 1, 2003
Expiration date	January 31, 2009
Address	Norco, LA 70079
Receiving water	BAYOU TREPAGNIER
Receiving water impaired	303(D) Listed
Subwatershed	Bayou La Branche-Frontal Lake Pontchartrain (HUC 080902030101)
Other EPA IDs (FRS)	RCRA handler LAR000000950

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

Effluent limits and exceedances

68Pollutants on file
68Under a numeric limit
20With a violation of any kind
0With 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; the 60 with the most exceedances of 68 are shown.

Pollutant or measure	Limits	Violations, any kind
Nitrogen, ammonia total [as N]	2	6
Phosphorus, total [as P]	2	6
BOD, 5-day, 20 deg. C	2	2
pH	2	2
Solids, total suspended	2	2
1,2-Dichloroethane	2	2
Methyl chloride [Chloromethane]	2	2
Methylene chloride	2	2
Nitrobenzene	2	2
Phenanthrene	2	2
Pyrene	2	2
Tetrachloroethylene	2	2
1,1-Dichloroethane	2	2
1,1-Dichloroethylene	2	2
1,1,1-Trichloroethane	2	2
1,1,2-Trichloroethane	2	2
Benzo[a]anthracene	2	2
1,2-Dichlorobenzene	2	2
1,2-Dichloropropane	2	2
Flow, in conduit or thru treatment plant	2	2
Carbon tetrachloride	2	0
Chloroform	2	0
Toluene	2	0
Benzene	2	0
Acenaphthylene	2	0
Acenaphthene	2	0
Acrylonitrile	2	0
Anthracene	2	0
Benzo[b]fluoranthene	2	0
Benzo[k]fluoranthene	2	0
Benzo[a]pyrene	2	0
Chlorobenzene	2	0
Chrysene	2	0
Diethyl phthalate	2	0
Dimethyl phthalate	2	0
Ethylbenzene	2	0
Fluoranthene	2	0
Fluorene	2	0
Hexachlorobutadiene	2	0
Hexachloroethane	2	0
trans-1,2-Dichloroethylene	2	0
1,2,4-Trichlorobenzene	2	0
1,3-Dichlorobenzene	2	0
1,4-Dichlorobenzene	2	0
2-Chlorophenol	2	0
2-Nitrophenol	2	0
2,4-Dichlorophenol	2	0
2,4-Dimethylphenol	2	0
2,4-Dinitrotoluene	2	0
2,4-Dinitrophenol	2	0
2,6-Dinitrotoluene	2	0
4-Nitrophenol	2	0
4,6-Dinitro-o-cresol	2	0
Phenol	2	0
Naphthalene	2	0
Di[2-ethylhexyl] phthalate [DEHP]	2	0
Di-n-butyl phthalate	2	0
Vinyl chloride	2	0
Trichloroethylene	2	0
Hexachlorobenzene	2	0

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES LA0050962.

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 LA0050962.

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 LA0050962 there.

Nearby on the register

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

This public-records page covers NPDES permit LA0050962 for SHELL CHEMICAL LP- NORCO-CYPRESS SITE in Norco, LA, which discharges to Bayou Trepagnier, with the permit listed as administratively continued and classed as a Major Discharger. The page reports 68 pollutants under a numeric limit and 0 pollutants with an effluent exceedance, with the permit issued December 1, 2003 and expiring January 31, 2009, as of September 15, 2026.