How many wastewater permits expire in Pennsylvania in 2027?

109 NPDES permits held by publicly owned wastewater treatment plants in Pennsylvania expire in 2027, covering a combined average flow of 43 MGD. The busiest month is Mar 2027 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 Pennsylvania in 2027?

Gr Hazleton Jt Sew Auth WWTP in Hazleton, treating about 5.15 MGD under permit PA0026921, expiring Feb 2027.

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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Pennsylvania wastewater permits expiring in 2027

Name: Pennsylvania NPDES permits expiring in 2027
Creator: Klarifi
License: https://klarifi.io/terms-of-service

109 NPDES permits · 43 MGD combined average flow

109 publicly owned wastewater treatment plants in Pennsylvania hold NPDES permits that expire during 2027, issued by Pennsylvania Department of Environmental Protection. 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 (95)2028 (73)All Pennsylvania NPDES permits →

Publicly owned wastewater treatment plants in Pennsylvania with NPDES permits expiring in 2027, from EPA ICIS-NPDES records. Refreshed on every release.
Facility	City	Avg flow (MGD)	NPDES permit	Expires	Technology	Violations (3y)
Swatara Twp STP	Hummelstown	2.91	PA0026735	Jan 2027	Clarifiers, Biogas silos	2
Earl Twp STP	New Holland	0.34	PA0086304	Jan 2027	—	2
Brown Twp STP	Reedsville	0.3	PA0028088	Jan 2027	Clarifiers	15
Moscow Sew Auth STP	Moscow	0.15	PA0061123	Jan 2027	Clarifiers, Carrousels / oxidation ditches	5
Shinglehouse Boro Water Dept	Shinglehouse	0.04	PA0036773	Jan 2027	Clarifiers	18
Confluence Boro STP	Confluence	0.03	PA0038164	Jan 2027	—	22
Gr Hazleton Jt Sew Auth WWTP	Hazleton	5.15	PA0026921	Feb 2027	Clarifiers, Biogas silos	6
Riverview Sani Auth STP	Moon Twp	1.72	PA0026352	Feb 2027	Clarifiers	0
Highspire Boro - STP	Highspire	0.58	PA0024040	Feb 2027	Clarifiers, Carrousels / oxidation ditches, Biogas silos	2
Kennett Square Boro WWTP	Kennett Square	0.53	PA0024058	Feb 2027	Aerated lagoons, Uncovered lagoons	267
Twin Boroughs STP	Mifflin	0.3	PA0023264	Feb 2027	—	2
W Branch Sew Auth STP	Northern Cambria	0.29	PA0205869	Feb 2027	—	30
Fairchance Georges STP	Smithfield	0.25	PA0096342	Feb 2027	—	13
East Hanover Twp Dairy Ln STP	Grantville	0.17	PA0247464	Feb 2027	—	14
Hawley Area Auth	Hawley	0.1	PA0060330	Feb 2027	—	5
Union Twp Leb Co Lickdale STP	Jonestown	0.07	PA0083607	Feb 2027	Clarifiers	5
Herndon Borough Jackson Twp Jt Muni Auth WWTP	Herndon	0.02	PA0228800	Feb 2027	—	2
Phoenixville Boro STP	Phoenixville	1.72	PA0027154	Mar 2027	Clarifiers	0
Upper Dublin WWTP	Fort Washington	0.67	PA0029441	Mar 2027	Clarifiers, Biogas silos	8
Pine Grove Joint Treatment Authority WWTP	Pine Grove	0.6	PA0020915	Mar 2027	—	2
Butler Twp - St Johns STP	Drums	0.55	PA0046388	Mar 2027	—	0
Manheim STP	Manheim	0.48	PA0020893	Mar 2027	Clarifiers, Uncovered lagoons, Carrousels / oxidation ditches	2
Fish Creek STP	Jamison	0.45	PA0050148	Mar 2027	Clarifiers, Aerated lagoons	0
Ridley Creek STP	West Chester	0.24	PA0050504	Mar 2027	Clarifiers	0
Williamsburg Munic Auth-Cl2 Bldg	Williamsburg	0.13	PA0021539	Mar 2027	—	3
Willolake STP	Canonsburg	0.06	PA0090018	Mar 2027	—	0
Pennsbury Village STP	Pittsburgh	0.03	PA0047228	Mar 2027	—	9
Perry Twp Municipal Auth STP	Star Junction	0.03	PA0252638	Mar 2027	—	0
Elderton STP	Elderton	0.02	PA0093033	Mar 2027	Uncovered lagoons	7
Dogwood Acres Mhp STP	Derry	0.02	PA0094455	Mar 2027	—	0
Quaker Lake WWTP	Brackney	0.0032	PA0060623	Mar 2027	—	0
St. Andrews Brae STP	Chester Springs	0.0015	PA0058378	Mar 2027	—	9
Elizabethtown STP	Elizabethtown	1.7	PA0023108	Apr 2027	Clarifiers, Carrousels / oxidation ditches	8
New Freedom Boro Auth WWTP	New Freedom	1.4	PA0043257	Apr 2027	Clarifiers	25
Harvey Avenue STP	Doylestown	1.1	PA0021172	Apr 2027	Clarifiers, Uncovered lagoons, Carrousels / oxidation ditches	0
Eureka WWTP	North Wales	0.97	PA0053180	Apr 2027	—	25
Mifflinburg WWTP	Mifflinburg	0.49	PA0028461	Apr 2027	Uncovered lagoons	0
Loysville STP	Loysville	0.23	PA0043494	Apr 2027	—	87
North East Boro WTP	North East	0.17	PA0037923	Apr 2027	Uncovered lagoons	1
Paradise Twp STP	Paradise	0.13	PA0083470	Apr 2027	—	45
Covi Douglas STP	Coraopolis	0.1	PA0096318	Apr 2027	—	14
Atglen Borough STP	Atglen	0.08	PA0024651	Apr 2027	—	39
Montour Township STP	Bloomsburg	0.05	PA0209058	Apr 2027	—	1
Perkiomen Crossing STP	Frederick	0.03	PA0054810	Apr 2027	—	13
Big Run Area WWTP	Punxsutawney	0.02	PA0223107	Apr 2027	—	3
Duman Lake Prk STP	Ebensburg	0.0032	PA0218561	Apr 2027	—	10
Eastern Snyder Cnty Regional Auth STP	Selinsgrove	1.02	PA0110582	May 2027	Clarifiers, Biogas silos	2
Annville Twp STP	Annville	0.56	PA0021806	May 2027	Clarifiers, Uncovered lagoons	4
North Middleton Auth STP	Carlisle	0.5	PA0024384	May 2027	Aerated lagoons	2
Mt Holly Springs STP	Mt Holly Springs	0.25	PA0023183	May 2027	Clarifiers, Carrousels / oxidation ditches	19
Macoby Creek STP	Pennsburg	0.15	PA0055875	May 2027	—	5
Christiana Boro WWTF	Atglen	0.12	PA0025399	May 2027	Clarifiers, Uncovered lagoons	23
Chicora Boro Sewer Authority	Chicora	0.1	PA0221708	May 2027	—	0
Yatesboro STP	Yatesboro	0.08	PA0216992	May 2027	—	24
Clay Twp - Hopeland STP	Stevens	0.02	PA0081213	May 2027	—	2
Bridgeport Boro STP	Bridgeport	0.41	PA0020397	Jun 2027	Clarifiers, Aerated lagoons, Biogas silos	28
Scma Deer Lake WWTP	Orwigsburg	0.32	PA0042170	Jun 2027	Clarifiers, Uncovered lagoons, Carrousels / oxidation ditches	0
Ellport Boro STP	Ellwood City	0.26	PA0038814	Jun 2027	—	6
Northern Lebanon Cnty Jonestown STP	Jonestown	0.22	PA0080748	Jun 2027	—	0
Lemoyne STP	Lemoyne	0.22	PA0026441	Jun 2027	Clarifiers	2
Kulpmont-Marion Hghts Joint Muni Auth	Kulpmont	0.16	PA0020338	Jun 2027	Uncovered lagoons	12
Roulette Township STP	Roulette	0.07	PA0209066	Jun 2027	—	98
Fredonia Boro WWTP	Fredonia	0.07	PA0020044	Jun 2027	—	7
Georges Crk Muni Auth STP	Smithfield	0.06	PA0218391	Jun 2027	Clarifiers	4
Salisbury Boro STP	Salisbury	0.06	PA0021628	Jun 2027	—	11
Beaver Meadows Municipal Authority	Beaver Meadows	0.05	PA0021199	Jun 2027	Aerated lagoons, Uncovered lagoons	0
Newell STP	Newell	0.04	PA0020656	Jun 2027	Uncovered lagoons	0
Harrison Twp WWTP	Harrison Valley	0.02	PA0228176	Jun 2027	—	3
Pine Twp STP	Templeton	0.02	PA0252760	Jun 2027	Uncovered lagoons	0
Blossburg Municipal Authority Wastewater Treatment Plant	Blossburg	—	PA0020036	Jun 2027	Clarifiers	2
Uniontown STP	Uniontown	4.2	PA0027219	Jul 2027	Clarifiers, Biogas silos	6
Martinsburg STP	Martinsburg	0.27	PA0028347	Jul 2027	—	3
Highland Park STP	Sellersville	0.09	PA0058271	Jul 2027	—	3
Albion Boro WWTP	Albion	0.5	PA0023124	Aug 2027	Clarifiers	3
Conyngham Boro Auth WWTP	Sugarloaf	0.36	PA0042048	Aug 2027	Clarifiers, Uncovered lagoons	51
Mount Union Borough	Mount Union	0.34	PA0020214	Aug 2027	—	3
Williamstown Boro STP	Williamstown	0.13	PA0021491	Aug 2027	Uncovered lagoons	60
Schwenksville Boro WWTP	Schwenksville	0.09	PA0020303	Aug 2027	Clarifiers	10
East Providence Twp STP	Breezewood	0.06	PA0038733	Aug 2027	—	1
Shippingport Boro STP	Shippingport	0.02	PA0252492	Aug 2027	—	3
Milford-Trumbauersville WWTP	Spinnerstown	0.47	PA0042021	Sep 2027	Aerated lagoons, Uncovered lagoons	9
Middle Smithfield Twp WWTP	East Stroudsburg	0.26	PA0060089	Sep 2027	—	9
Saxton STP	Saxton	0.14	PA0025381	Sep 2027	Clarifiers, Uncovered lagoons	9
Carrolltown Boro STP	Carrolltown	0.06	PA0111201	Sep 2027	—	6
Chestnut Ridge Area WWTP	New Paris	0.41	PA0087661	Oct 2027	Uncovered lagoons	12
14 Mile Run STP	Latrobe	0.24	PA0252999	Oct 2027	Clarifiers, Uncovered lagoons	2
Chapel Hill WWTP	Huntingdon Valley	0.12	PA0046868	Oct 2027	—	10
Nescopeck Boro	Nescopeck	0.07	PA0020745	Oct 2027	—	1
S Woodbury Twp STP	Loysburg	0.07	PA0088226	Oct 2027	—	12
E St Clair Twp Fishertown STP	New Paris	0.02	PA0082694	Oct 2027	Aerated lagoons, Uncovered lagoons	0
Pottsgrove STP	Milton	0.01	PA0228478	Oct 2027	—	3
E St Clair Twp Stone Cr STP	Fishertown	0.01	PA0082732	Oct 2027	Uncovered lagoons	0
West Hanover Twp STP	Harrisburg	0.45	PA0085511	Nov 2027	—	8
Sci Somerset STP	Somerset	0.28	PA0205681	Nov 2027	Clarifiers, Carrousels / oxidation ditches	13
Patton Borough STP	Patton	0.21	PA0110469	Nov 2027	Clarifiers, Carrousels / oxidation ditches	7
Bci Municipal Authority STP	Irvona	0.1	PA0114936	Nov 2027	—	0
Alexandria Porter STP	Alexandria	0.06	PA0043443	Nov 2027	—	5
Greenfield Twp Sew Auth	Carbondale	0.05	PA0061671	Nov 2027	—	48
Montgomery Run Backwash Treatment Fac	Clearfield	0.05	PA0228206	Nov 2027	—	11
Lower Mahanoy Twp Mun Auth	Dalmatia	0.03	PA0228231	Nov 2027	—	0
Greenwood Twp Muni Auth Sew Sys STP	Orangeville	0.0024	PA0113069	Nov 2027	—	1
Hanover Boro STP	Mcsherrystown	3.65	PA0026875	Dec 2027	Clarifiers, Carrousels / oxidation ditches, Biogas silos	2
Scma Gordon WWTP	Gordon	0.28	PA0062201	Dec 2027	—	1
Freedom Twp - STP	Duncansville	0.21	PA0110361	Dec 2027	Clarifiers	1
Regional Water Pollution Control Facility	Houtzdale	0.12	PA0046159	Dec 2027	—	12
Morrisville Water Filtration Plant	Yardley	0.05	PA0051292	Dec 2027	Uncovered lagoons	0
Hartley Twp Muni Auth WWTP	Laurelton	0.05	PA0043583	Dec 2027	—	21
Longvue #2 STP	Pittsburgh	0.03	PA0028193	Dec 2027	—	8
Penns Creek Muni Auth	Penns Creek	0.03	PA0112933	Dec 2027	—	143

Pennsylvania permit renewals in 2027: 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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