How many wastewater permits expire in Arizona in 2027?

12 NPDES permits held by publicly owned wastewater treatment plants in Arizona expire in 2027, covering a combined average flow of 40 MGD. The busiest month is Apr 2027 with 3 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 Arizona in 2027?

Pima County - Ina Road WWTP in Tucson, treating about 31.89 MGD under permit AZ0020001, expiring May 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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Arizona wastewater permits expiring in 2027

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

12 NPDES permits · 40 MGD combined average flow

12 publicly owned wastewater treatment plants in Arizona hold NPDES permits that expire during 2027, issued by Arizona 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 (9)2028 (5)All Arizona NPDES permits →

Publicly owned wastewater treatment plants in Arizona 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)
Town Of Prescott Valley - WWTP	Prescott Valley	2.74	AZ0025381	Feb 2027	Clarifiers, Aerated lagoons, Carrousels / oxidation ditches, Biogas silos	0
Goodyear, City Of - 157th Ave WWTP	Goodyear	2.5	AZ0022357	Mar 2027	Carrousels / oxidation ditches	1
American Gulch Wastewater Treatment Plant	Payson	0.69	AZ0020117	Apr 2027	Clarifiers	0
Cottonwood WWTF	Cottonwood	1.04	AZ0024716	Apr 2027	Clarifiers	16
Tuba City WWTP	Tuba City	0.42	NN0020290	Apr 2027	Aerated lagoons, Uncovered lagoons	138
Pima County - Ina Road WWTP	Tucson	31.89	AZ0020001	May 2027	Clarifiers, Uncovered lagoons, Biogas silos	3
Yuma Main Street Treatment Plant	Yuma	0.12	AZ0025411	May 2027	—	1
City Of Peoria	Peoria	0.23	AZ0024945	Jul 2027	Biogas silos	17
Tusayan Sanitary District	Grand Canyon	0.03	AZ0026719	Aug 2027	Clarifiers, Covered lagoons, Uncovered lagoons, Biogas silos, Biogas balloons	0
Town Of Marana Water Reclamation Facility	Marana	—	AZ0024520	Aug 2027	Clarifiers, Aerated lagoons, Uncovered lagoons	0
Quartzsite, Town Of - WWTP	Quartzsite	0.2	AZ0023752	Aug 2027	Aerated lagoons, Uncovered lagoons	6
Painted Mesa Water Reclamation Facility	Holbrook	—	AZ0025542	Nov 2027	Clarifiers, Carrousels / oxidation ditches	0

Arizona 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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