How many wastewater permits expire in Louisiana in 2028?

70 NPDES permits held by publicly owned wastewater treatment plants in Louisiana expire in 2028, covering a combined average flow of 46 MGD. The busiest month is Sep 2028 with 15 expiries.

What happens when an NPDES permit expires?

The plant must have applied for renewal at least 180 days before the expiry date. If the agency has not reissued the permit by then, the old permit is administratively continued and stays enforceable. The reissued permit typically carries updated effluent limits based on the latest water-quality standards, which is what drives upgrade projects.

Which is the largest plant with a permit expiring in Louisiana in 2028?

Jefferson Parish Department Of Sewerage- East Bank WWTP in Elmwood, treating about 20.66 MGD under permit LA0066630, expiring Jul 2028.

How do I get contacts for the plants on this list?

Every plant links to its profile with flow, technology and compliance data. Verified decision-maker contacts for each plant, and the same list for every state and year, are available in Klarifi with a free trial.

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Louisiana wastewater permits expiring in 2028

Name: Louisiana NPDES permits expiring in 2028
Creator: Klarifi
License: https://klarifi.io/terms-of-service

70 NPDES permits · 46 MGD combined average flow

70 publicly owned wastewater treatment plants in Louisiana hold NPDES permits that expire during 2028, issued by Louisiana Department of Environmental Quality. The table lists each plant with its permit number, expiry month, average flow, treatment technology and three-year violation count, in order of expiry.

An NPDES permit runs for five years. To keep discharging, a plant must apply for renewal at least 180 days before the expiry date, and the renewed permit usually arrives with tighter effluent limits, new monitoring requirements or a compliance schedule. That is why the year a permit expires is the year a plant starts budgeting for upgrades: nutrient removal, disinfection, capacity or controls.

Other years:

2026 (18)2027 (25)All Louisiana NPDES permits →

Publicly owned wastewater treatment plants in Louisiana with NPDES permits expiring in 2028, from EPA ICIS-NPDES records. Refreshed on every release.
Facility	City	Avg flow (MGD)	NPDES permit	Expires	Technology	Violations (3y)
Pleasant Hill, Village Of- Wastewater Treatment Facility	Pleasant Hill	0.04	LA0038946	Feb 2028	Uncovered lagoons, Carrousels / oxidation ditches	298
Town Of Delcambre WWTP	Delcambre	0.43	LA0033251	Mar 2028	—	165
Four Corners Treatment Plant	Four Corners	0.08	LA0088765	Mar 2028	—	31
Grundy Cooper Subdivision WWTP	Alexandria	0.04	LA0039012	Mar 2028	—	20
Doyline Wastewater Treatment Facility	Doyline	0.02	LA0075400	Mar 2028	—	20
Harrisonburg WWTF	Harrisonburg	0.0009	LA0043958	Mar 2028	—	124
Phoenix Wastewater Treatment Plant	Braithwaite	—	LA0067270	Mar 2028	—	22
Covington Country Club Wastewater Treatment Plant	Covington	0.13	LA0080403	Apr 2028	—	50
Sewer District #7 WWTP	Shreveport	0.11	LA0097276	Apr 2028	—	84
Plain Dealing Town Of	Plain Dealing	0.04	LA0020044	Apr 2028	—	19
Basile, Town Of WWTP	Basile	0.15	LA0044865	Apr 2028	—	337
North Monroe Sew District #1	Monroe	0.14	LA0039209	Apr 2028	—	50
Napoleonville Sto	Napoleonville	0.1	LA0043966	Apr 2028	—	15
Simsboro, Village Of	Simsboro	0.06	LA0065102	Apr 2028	Uncovered lagoons	90
Red River Wastewater Treatment Plant	Bossier City	4.48	LA0053716	May 2028	Clarifiers, Carrousels / oxidation ditches	0
Rayville WWTF	Rayville	1.05	LA0020559	May 2028	Aerated lagoons, Uncovered lagoons	180
Luling Oxidation Pond	Luling	0.84	LA0032131	May 2028	Aerated lagoons, Uncovered lagoons	7
Town Of Rosepine Water System	Rosepine	0.14	LA0047236	May 2028	Uncovered lagoons	6
Oberlin, Town Of (stp)	Oberlin	0.13	LA0020087	May 2028	Covered lagoons, Uncovered lagoons	14
Glenmora, Town Of Water Sys	Glenmora	0.07	LA0054925	May 2028	Clarifiers, Uncovered lagoons, Carrousels / oxidation ditches	3
Erwinville WWTF	Port Allen	0.000000092	LA0122131	Jun 2028	—	64
Ruston, City Of- Northside Wastewater Treatment Plant	Ruston	3.22	LA0036323	Jun 2028	Clarifiers, Carrousels / oxidation ditches	81
Oak Grove, Town Of- WWTP	Oak Grove	0.53	LA0043648	Jun 2028	Aerated lagoons	10
Farmerville Waste Water Treatment Plant	Farmerville	0.45	LA0039888	Jun 2028	—	10
Town Of Urania Water System-Z-Aeration	Urania	0.14	LA0040991	Jun 2028	—	124
Town Of Lecompte WWTP	Lecompte	0.05	LA0047031	Jun 2028	—	2
Cloverdale Subd. WTP	Alexandria	0.04	LA0039021	Jun 2028	—	6
Lake Arthur, Town Of	Lake Arthur	0.48	LA0020133	Jul 2028	—	102
Benton Wastewater Treatment Plant	Benton	0.3	LA0038784	Jul 2028	—	9
Centerville Treatment Plant	Centerville	0.1	LA0065552	Jul 2028	—	4
Fisher/florien Wastewater Treatment Facility	Florien	0.02	LA0093939	Jul 2028	—	33
Town Of Erath WTP	Erath	0.19	LA0115711	Jul 2028	—	6
Jefferson Parish Department Of Sewerage- East Bank WWTP	Elmwood	20.66	LA0066630	Jul 2028	Clarifiers, Biogas silos	0
St Tammany Sewer Dist 4 Wastsewater Treatment Facility	Covington	0.12	LA0043583	Jul 2028	—	6
Northwest Hammond Treatment Facility	Hammond	0.11	LA0119466	Jul 2028	—	121
Morganza Water System-Well 003 Treatment Plant	Morganza	0.07	LA0020028	Jul 2028	—	131
Grand Coteau Wastewater Treatment Facility	Grand Coteau	0.06	LA0072001	Jul 2028	—	247
Rosethorn WWTP	Lafitte	0.07	LA0100846	Aug 2028	—	6
Hammond North STP	Hammond	4.87	LA0032328	Aug 2028	Aerated lagoons, Uncovered lagoons, Carrousels / oxidation ditches	36
Gretna City Of Wastewater Treatment Plant	Gretna	1.17	LA0041262	Aug 2028	Clarifiers, Uncovered lagoons	10
Haynesville Town Of	Haynesville	0.26	LA0034614	Aug 2028	—	9
Tigerville Wastewater Treatment Plant	Edgard	0.03	LA0079588	Aug 2028	—	14
Penal Complex WWTP	Plain Dealing	0.002	LA0116238	Aug 2028	—	28
Terrebonne Ph Consolidated Gov	Houma	—	LAG540719	Aug 2028	Aerated lagoons, Uncovered lagoons	4
Town Of Eros STP	Eros	—	LAG542178	Aug 2028	Aerated lagoons	20
St. Tammany Parish Government - Castine Regional Sewage Treatment Plant	Mandeville	0.48	LA0120154	Aug 2028	—	18
Leesville, City Of	Leesville	0.81	LA0043575	Aug 2028	Uncovered lagoons, Carrousels / oxidation ditches	124
Scott Wastewater Treatment Facility	Scott	0.77	LA0034495	Aug 2028	Uncovered lagoons	181
Town Of Jonesboro	Jonesboro	0.15	LA0038547	Aug 2028	—	57
Town Of Sibley WWTF	Sibley	0.05	LA0075396	Aug 2028	—	102
Highway 22 STP	Madisonville	0.2	LA0117676	Sep 2028	—	21
Many, Town Of	Many	0.14	LA0056502	Sep 2028	—	80
Town Of Woodworth WWTP	Woodworth	0.1	LA0112917	Sep 2028	—	83
Tallow Creek Subdivision STP	Covington	0.06	LA0117927	Sep 2028	—	9
Community Of Independence WWTF	Saint Francisville	0.004	LA0125971	Sep 2028	—	25
Village Of Mer Rouge	Mer Rouge	0.0012	LA0043974	Sep 2028	Uncovered lagoons	18
South Mansfield, Village Of- South Mansfield WWTP	South Mansfield	0.0001	LA0066613	Sep 2028	—	238
Westwood Regional STP	Mandeville	0.37	LA0063991	Sep 2028	—	15
Town Of Mamou WWTF	Mamou	0.27	LA0020125	Sep 2028	—	97
Welsh, Town Of	Welsh	0.2	LA0020591	Sep 2028	—	4
Winnsboro, Town Of Winnsboro	Winnsboro	0.17	LA0020281	Sep 2028	Clarifiers, Uncovered lagoons, Carrousels / oxidation ditches	102
Southwest Regional Stf	Hammond	0.07	LA0126501	Sep 2028	—	52
Village Of Hessmer Water System-Disinfection	Hessmer	0.06	LA0046469	Sep 2028	—	80
Town Of Leonville WWTP	Arnaudville	0.05	LA0114740	Sep 2028	—	50
Town Of Marion	Marion	0.05	LA0043656	Sep 2028	—	29
Ramos Wetland Assimilation	Amelia	0.24	LA0115487	Oct 2028	—	4
Greensburg Water System	Greensburg	0.03	LA0038423	Oct 2028	—	79
Franklinton STP	Franklinton	0.56	LA0038831	Nov 2028	—	31
Village Of Maurice - South WWTP	Maurice	0.15	LA0127202	Dec 2028	Covered lagoons	6
Maurice, Village Of- Wastewater Treatment Plant	Maurice	0.11	LA0038393	Dec 2028	—	37

Louisiana permit renewals in 2028: questions

Sources and methodology

Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.

Data refreshed September 11, 2026.

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