Velarion Records
Follow this permit Velarion Records emails you this permit’s record, cited to the public filing, and tells you when the register changes it. Free.
We’ll email you a link to confirm. The continuous daily watch on every change is the paid alert. Unsubscribe any time.
Also free: The Pay Desk, the weekly executive pay briefing.

Clean Water Act discharge permit · NPDES LA0005762

SHELL CHEMICAL LP- NORCO CHEMICAL PLANT- WEST SITE, Norco, LA: NPDES LA0005762 discharge permit, effluent exceedances, inspections, penalties

SHELL CHEMICAL LP- NORCO CHEMICAL PLANT- WEST SITE, held by Shell Chemical LP- Norco Chemical Plant- West Site, holds NPDES permit LA0005762, which discharges to Mississippi River. EPA’s file records it issued August 5, 2014 and expiring August 31, 2019. 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 filedSHELL CHEMICAL LP- NORCO CHEMICAL PLANT- WEST SITE
Permittee as filedShell Chemical LP- Norco Chemical Plant- West Site
NPDES IDLA0005762
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMajor discharger
Facility typeNot a publicly owned treatment works
IssuedAugust 5, 2014
Expiration dateAugust 31, 2019
AddressNorco, LA 70079
Receiving waterMISSISSIPPI RIVER
Receiving water impaired303(D) Listed
SubwatershedMississippi River-Bonnet Carre Spillway (HUC 080901000101)
Other EPA IDs (FRS)RCRA handler LAR000042226; ICIS-AIR source LA0000002208900008

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

Effluent limits and exceedances

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 80 are shown.

Pollutant or measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Solids, total suspended21312January 31, 202699,999% over the limit
Sulfide, total [as S]233May 31, 202599,999% over the limit
Benzo[k]fluoranthene242December 31, 2021311% over the limit
Benzo[a]pyrene242December 31, 2021270% over the limit
Chrysene242December 31, 2021311% over the limit
Hexachlorobutadiene242December 31, 2021711% over the limit
Benzo[a]anthracene242December 31, 2021311% over the limit
Hexachlorobenzene242December 31, 2021517% over the limit
pH range excursions, > 60 minutes122December 31, 200899,999% over the limit
pH1271September 30, 2025
Zinc, total [as Zn]251March 31, 201543% over the limit
Carbon, tot organic [TOC]741June 30, 200864% over the limit
Oil and grease711September 30, 200853% over the limit
Phenolics, total recoverable211August 31, 201496% over the limit
Naphthalene211September 30, 2006116% over the limit
Flow, in conduit or thru treatment plant12120
Nitrogen, ammonia total [as N]240
Copper, total [as Cu]240
Methylene chloride240
Oil & Grease030
Chloroform220
Toluene220
Acenaphthylene220
Acenaphthene220
Acrylonitrile220
Anthracene220
Benzo[b]fluoranthene220
Chlorobenzene220
Diethyl phthalate220
Dimethyl phthalate220
Fluoranthene220
Fluorene220
Hexachloroethane220
Methyl chloride [Chloromethane]220
Nitrobenzene220
Phenanthrene220
Pyrene220
Tetrachloroethylene220
1,1-Dichloroethane220
1,1-Dichloroethylene220
1,1,1-Trichloroethane220
1,1,2-Trichloroethane220
1,2-Dichlorobenzene220
trans-1,2-Dichloroethylene220
1,2,4-Trichlorobenzene220
1,3-Dichlorobenzene220
1,4-Dichlorobenzene220
2-Chlorophenol220
2-Nitrophenol220
2,4-Dichlorophenol220
2,4-Dimethylphenol220
2,4-Dinitrotoluene220
2,4-Dinitrophenol220
2,6-Dinitrotoluene220
4-Nitrophenol220
4,6-Dinitro-o-cresol220
Di[2-ethylhexyl] phthalate [DEHP]220
Di-n-butyl phthalate220
Vinyl chloride220
Trichloroethylene220

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

EPA’s single-event violation file, as loaded, holds no violation for NPDES LA0005762.

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, LA0005762.

Start the watch

How often?
  • One permit holder — $99/month
  • One watershed — $2,990/year
  • One state — $4,990/year
  • The whole register — $18,000/year

How we handle your data → Privacy

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 LA0005762 there.

Nearby on the register

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

What this page shows

This public-records page covers NPDES permit LA0005762, held by Shell Chemical LP- Norco Chemical Plant- West Site and discharging to the Mississippi River, with its status shown as administratively continued and its discharger class as major. The page lists 78 pollutants under a numeric limit and 15 pollutants with an effluent exceedance.