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Clean Water Act discharge permit · NPDES LA0042048

JEFFERSON PARISH DEPARTMENT OF SEWERAGE- MARRERO WWTP, Marrero, LA: NPDES LA0042048 discharge permit, effluent exceedances, inspections, penalties

JEFFERSON PARISH DEPARTMENT OF SEWERAGE- MARRERO WWTP, held by Jefferson Parish Department of Sewerage- Marrero WWTP, holds NPDES permit LA0042048, which discharges to Mayronne Canal/Millaudon Canal. EPA’s file records it issued August 13, 2015 and expiring September 30, 2020. 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 filedJEFFERSON PARISH DEPARTMENT OF SEWERAGE- MARRERO WWTP
Permittee as filedJefferson Parish Department of Sewerage- Marrero WWTP
NPDES IDLA0042048
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMajor discharger
Facility typePublicly owned treatment works
ProgramPublicly owned treatment works
IssuedAugust 13, 2015
Expiration dateSeptember 30, 2020
AddressMarrero, LA 70072
Receiving waterMAYRONNE CANAL/MILLAUDON CANAL
SubwatershedMississippi River-Bonnet Carre Spillway (HUC 080901000101)
Program components on filePOTW, Pretreatment
SIC4952 – Sewerage Systems

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.

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 111 are shown.

Pollutant or measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Solids, total suspended3256244September 30, 20211,073% over the limit
BOD, 5-day, 20 deg. C3251239August 31, 2024293% over the limit
Coliform, fecal general25648May 31, 202223,673% over the limit
pH2124August 31, 2025
Flow, in conduit or thru treatment plant280
Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex220
NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex220
Nitrite + Nitrate total [as N]020
Phosphorus, total [as P]020
Cyanide, total [as CN]020
Fluoride, total [as F]020
Arsenic, total [as As]020
Barium, total [as Ba]020
Beryllium, total [as Be]020
Cadmium, total [as Cd]020
Chromium, hexavalent [as Cr]020
Chromium, trivalent [as Cr]020
Copper, total [as Cu]020
Lead, total [as Pb]020
Thallium, total [as Tl]020
Nickel, total [as Ni]020
Silver, total [as Ag]020
Zinc, total [as Zn]020
Antimony, total [as Sb]020
Selenium, total [as Se]020
p-Dichlorobenzene020
2,4,5-Trichlorophenoxypropionic acid020
Dichlorobromomethane020
Carbon tetrachloride020
1,2-Dichloroethane020
Bromoform020
Chloroform020
Phenolics, total recoverable020
Toluene020
Benzene020
Acrolein020
Acrylonitrile020
Anthracene020
Bis[2-chloroethyl] ether020
Bis[2-chloroisopropyl] ether020
Chlorobenzene020
Diethyl phthalate020
Dimethyl phthalate020
1,2-Diphenylhydrazine020
.beta.-Endosulfan020
.alpha.-Endosulfan020
Ethylbenzene020
Fluoranthene020
Hexachlorocyclopentadiene020
Hexachlorobutadiene020
Hexachloroethane020
Isophorone020
Methyl chloride [Chloromethane]020
Methylene chloride, suspended020
N-Nitrosodiphenylamine020
N-Nitrosodimethylamine [NDMA]020
Nitrobenzene020
Tetrachloroethylene020
1,1-Dichloroethane020
1,1-Dichloroethylene020

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

DateWhat EPA recordedAgency
February 28, 2025Failure to minimize or prevent SSO to waters of the U.S. - adverse impacts [40 CFR 122.41(d)]ST6
February 28, 2025Failure to properly operate and maintain the sanitary sewer system [40 CFR 122.41(e)]ST6
October 31, 2023Failure to minimize or prevent SSO to waters of the U.S. - adverse impacts [40 CFR 122.41(d)]ST6
October 31, 2023Failure to properly operate and maintain the sanitary sewer system [40 CFR 122.41(e)]ST6
September 30, 2023WW SSO - Discharge to WatersST6
September 30, 2023WW SSO - Improper Operation and MaintenanceST6
March 16, 2022Monitoring Violations - Improper Analysis or Lab ErrorST6
July 31, 2021WW SSO - Discharge to WatersST6
July 31, 2021WW SSO - Improper Operation and MaintenanceST6
June 30, 2021WW SSO - Improper Operation and MaintenanceST6
June 30, 2021Reporting Violations - Improper/ Incorrect ReportingST6
June 30, 2021WW SSO - Discharge to WatersST6
December 31, 2020WW SSO - Discharge to WatersST6
December 31, 2020WW SSO - Improper Operation and MaintenanceST6
May 21, 2020Reporting Violations - Improper/ Incorrect ReportingST6
May 21, 2020Permit Violations - Violation Specified in CommentST6
November 30, 2018WW SSO - Discharge to WatersST6
November 30, 2018WW SSO - Improper Operation and MaintenanceST6
October 31, 2018WW SSO - Discharge to WatersST6
October 31, 2018WW SSO - Improper Operation and MaintenanceST6
March 31, 2017Effluent Violations - Numeric effluent violationST6

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 LA0042048 there.

Nearby on the register

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

What this page shows

This public-records page covers Clean Water Act NPDES permit LA0042048, held by Jefferson Parish Department of Sewerage- Marrero WWTP in Marrero, LA, which discharges to Mayronne Canal/Millaudon Canal within the Mississippi River-Bonnet Carr subwatershed. The permit is listed as Administratively continued, with 15 for discharger class, 4 pollutants under a numeric limit, and 4 pollutants with an effluent exceedance. The permit was issued August 13, 2015 and had an expiration date of September 30, 2020.