Clean Water Act discharge permit · NPDES LA0105856

NORTH AMERICAN SHIPBUILDING LLC - LAROSE SHIPYARD, Larose, LA: NPDES LA0105856 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
8Pollutants under a numeric limit
1Pollutants with an effluent exceedance

NORTH AMERICAN SHIPBUILDING LLC - LAROSE SHIPYARD, held by NORTH AMERICAN SHIPBUILDING, LLC, holds NPDES permit LA0105856, which discharges to Icww. EPA’s file records it issued March 1, 2017 and expiring March 31, 2022. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filed	NORTH AMERICAN SHIPBUILDING LLC - LAROSE SHIPYARD
Permittee as filed	NORTH AMERICAN SHIPBUILDING, LLC
NPDES ID	LA0105856
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	March 1, 2017
Expiration date	March 31, 2022
Address	Larose, LA 70373
Receiving water	ICWW
Receiving water impaired	303(D) Listed
Subwatershed	Forty Arpent Canal (HUC 080903010308)
SIC	3731 – Ship Building And Repairing
Other EPA IDs (FRS)	RCRA handler LAR000009183; ICIS-AIR source LA0000002205700136

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.

Effluent limits and exceedances

8Pollutants on file
8Under a numeric limit
7With a violation of any kind
1With 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	2	23	19	August 31, 2024	143% over the limit
Flow, in conduit or thru treatment plant	6	12	0
BOD, 5-day, 20 deg. C	2	4	0
Coliform, fecal general	2	4	0
pH	4	2	0
Oil and grease	2	1	0
Carbon, tot organic [TOC]	1	1	0
Oxygen demand, chem. [high level] [COD]	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 LA0105856.

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

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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 LA0105856 there.

Nearby on the register

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

This public-records page covers Clean Water Act NPDES permit LA0105856, held by NORTH AMERICAN SHIPBUILDING, LLC for the North American Shipbuilding LLC - Larose Shipyard in Larose, LA, with the permit listed as administratively continued. The page lists 8 as the discharger class and 1 pollutant under a numeric limit, with 1 pollutant showing an effluent exceedance.