Clean Water Act discharge permit · NPDES LA0117676

HIGHWAY 22 STP, Madisonville, LA: NPDES LA0117676 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
9Pollutants under a numeric limit
3Pollutants with an effluent exceedance

HIGHWAY 22 STP, held by ST. TAMMANY PARISH GOVERNMENT, TAMMANY UTILITIES, holds NPDES permit LA0117676. EPA’s file records it issued September 16, 2016 and expiring October 31, 2021. 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	HIGHWAY 22 STP
Permittee as filed	ST. TAMMANY PARISH GOVERNMENT, TAMMANY UTILITIES
NPDES ID	LA0117676
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	September 16, 2016
Expiration date	October 31, 2021
Address	Madisonville, LA 70447
Receiving water impaired	303(D) Listed
Subwatershed	Ponchitalawa Creek-Tchefuncta River (HUC 080902010206)

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

Effluent limits and exceedances

9Pollutants on file
9Under a numeric limit
5With a violation of any kind
3With 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	3	9	9	June 30, 2026	147% over the limit
Nitrogen, ammonia total [as N]	3	7	7	April 30, 2025	780% over the limit
BOD, carbonaceous [5 day, 20 C]	3	5	5	June 30, 2026	60% over the limit
Flow, in conduit or thru treatment plant	2	6	0
Oil & Grease	1	1	0
Nitrogen, total [as N]	3	0	0
Phosphorus, total [as P]	3	0	0
pH	2	0	0
Coliform, fecal general	2	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

4Single-event violations

Date	What EPA recorded	Agency
July 17, 2020	WW SSO - Improper Operation and Maintenance	ST6
June 25, 2018	WW SSO - Discharge to Waters	ST6
June 22, 2018	WW SSO - Discharge to Waters	ST6
January 18, 2018	WW SSO - Improper Operation and Maintenance	ST6

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 LA0117676 there.

Nearby on the register

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

This public-records page covers the Clean Water Act discharge permit NPDES LA0117676 for the HIGHWAY 22 STP in Madisonville, LA, held by ST. TAMMANY PARISH GOVERNMENT, TAMMANY UTILITIES, which is listed as administratively continued and a Minor discharger. The page lists 3 pollutants under a numeric limit and 3 pollutants with an effluent exceedance, with the permit's issue date of September 16, 2016 and expiration date of October 31, 2021 as recorded in EPA's permit file.