How many wastewater permits expire in New Jersey in 2027?

33 NPDES permits held by publicly owned wastewater treatment plants in New Jersey expire in 2027, covering a combined average flow of 8 MGD. The busiest month is Dec 2027 with 21 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 New Jersey in 2027?

East Windsor Water Pollution Control Plant in East Windsor, treating about 2.38 MGD under permit NJ0023787, expiring Mar 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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New Jersey wastewater permits expiring in 2027

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

33 NPDES permits · 8 MGD combined average flow

33 publicly owned wastewater treatment plants in New Jersey hold NPDES permits that expire during 2027, issued by New Jersey 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 (20)2028 (10)All New Jersey NPDES permits →

Publicly owned wastewater treatment plants in New Jersey 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)
East Windsor Water Pollution Control Plant	East Windsor	2.38	NJ0023787	Mar 2027	Clarifiers, Uncovered lagoons	86
Harrison Brook STP	Liberty Corner	1.29	NJ0022845	Mar 2027	Clarifiers, Aerated lagoons, Carrousels / oxidation ditches	6
Bernardsville Boro	Bernardsville	0.44	NJ0026387	Mar 2027	—	0
Palmyra Boro Municipal Building	Palmyra	0.37	NJ0024449	Mar 2027	—	4
Wanaque Valley Rgnl Sewer Auth Treatment Plant	Wanaque	0.65	NJ0053759	Jun 2027	Clarifiers, Carrousels / oxidation ditches	38
Penns Grove Sewerage Authority	Penns Grove	0.25	NJ0024023	Jun 2027	Clarifiers	107
Delaware Township MUA	Sergeantsville	0.02	NJ0027561	Jun 2027	—	14
Stage Ii Treatment Plant	Montgomery	0.4	NJ0026905	Sep 2027	Clarifiers	46
Warren Cnty MUA Belvidere Area WWTF	Belvidere	0.3	NJ0035114	Sep 2027	Clarifiers	4
Hightstown Boro AWWTP	Hightstown	0.25	NJ0029475	Sep 2027	Clarifiers, Biogas silos	44
Schooley'S Mountain Wastewater Treatment Plan	Long Valley	0.25	NJ0023493	Sep 2027	—	3
White Rock STP	Jefferson Twp	—	NJ0026867	Sep 2027	Clarifiers	27
Cinnaminson Twp Sewerage Auth	Cinnaminson	1.28	NJ0024007	Dec 2027	Clarifiers	16
Greystone Park Psych Hospital	Greystone Park	0.17	NJ0026689	Dec 2027	—	161
North Warren Regional School	Blairstown Twp	0.01	NJG031046	Dec 2027	—	5
Njdhs Senator Garrett Hagedorn Psyciatric Hospital	Glen Gardner	0.007	NJ0022144	Dec 2027	—	56
Lounsberry Hollow Middle Sch STP	Vernon Twp	0.0067	NJG023841	Dec 2027	—	22
Kittatinny Reg Hs/marion Mckeown School	Newton	0.0057	NJG028894	Dec 2027	—	21
Sparta Alpine School	Sparta	0.005	NJG027065	Dec 2027	—	16
Jefferson Twp High-Middle School	Jefferson Twp	0.0049	NJG021091	Dec 2027	—	6
High Point Regional Hs	Wantage Twp	0.0044	NJG031585	Dec 2027	—	9
Ramapo Indian Hills Rgnl Sd Indian Hills High School WTP	Oakland	0.003	NJG021253	Dec 2027	—	0
Springfield Twp Bd Of Ed Elementary School	Jobstown	0.0026	NJG021571	Dec 2027	—	46
Warren Co Technical School STP	Washington	0.002	NJG020711	Dec 2027	—	5
Alexandria Middle School	Pittstown	0.0019	NJG035670	Dec 2027	—	11
Clinton Twp Bd Of Ed Round Valley School	Lebanon	0.0018	NJG023175	Dec 2027	—	60
Arthur Stanlick School	Jefferson	0.0013	NJG021105	Dec 2027	—	4
Union Twp School	Hampton	0.0009	NJG024091	Dec 2027	—	6
Stonybrook School	Kinnelon	0.00077	NJG022276	Dec 2027	—	19
Long Pond School WWTF	Newton	0.0007	NJG020419	Dec 2027	—	1
Robert Erskine School STP	Ringwood	0.00044	NJG029432	Dec 2027	—	16
Helen A Fort Middle School	Pemberton Twp	0.00026	NJG022438	Dec 2027	—	445
Lester D. Wilson Elem School	Pittstown	0.00006	NJG027553	Dec 2027	—	20

New Jersey 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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