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Clean Water Act discharge permit · NPDES LA0020125

TOWN OF MAMOU WWTF, Mamou, LA: NPDES LA0020125 discharge permit, effluent exceedances, inspections, penalties

TOWN OF MAMOU WWTF, held by TOWN OF MAMOU, holds NPDES permit LA0020125, which discharges to 5a. EPA’s file records it issued August 31, 2017 and expiring September 30, 2022. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filedTOWN OF MAMOU WWTF
Permittee as filedTOWN OF MAMOU
NPDES IDLA0020125
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMinor discharger
Facility typePublicly owned treatment works
ProgramPublicly owned treatment works
IssuedAugust 31, 2017
Expiration dateSeptember 30, 2022
AddressMamou, LA 70554
Receiving water5A
SubwatershedGrand Louis Bayou-Bayou Nezpique (HUC 080802010109)

Cited to the EPA ICIS-NPDES permit file (ECHO 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.

Pollutant or measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Nitrogen, ammonia total [as N]3280265June 30, 20261,083% over the limit
Solids, total suspended3117102May 31, 2026552% over the limit
Coliform, fecal general28474May 31, 202699,999% over the limit
BOD, carbonaceous [5 day, 20 C]36651March 31, 2022344% over the limit
Oxygen, dissolved [DO]1116July 31, 202114% over the limit
pH2111July 31, 2018
Flow, in conduit or thru treatment plant2100
Nitrogen, total [as N]300
Phosphorus, total [as P]300

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
March 23, 2021Management Practice Violations - Violation of a milestone in an orderST6
March 23, 2021Permit Violations - Failure to Submit Timely Permit Renewal ApplicationST6
July 23, 2020Management Practice Violations - Improper Operation and MaintenanceST6
July 23, 2020Biosolids: Other Management Practice ViolationST6
December 31, 2019Permit Violations - Violation Specified in CommentST6
October 29, 2019WW SSO - Discharge to WatersST6
October 29, 2019WW SSO - Improper Operation and MaintenanceST6
December 31, 2017Permit Violations - Violation Specified in CommentST6

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 LA0020125 there.

Nearby on the register

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