Arizona wastewater permits expiring in 2027
12 NPDES permits · 38 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.
| Facility | City | Avg flow (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|
| Town Of Prescott Valley - WWTP | Prescott Valley | 2.69 | AZ0025381 | Feb 2027 | 0 |
| Goodyear, City Of - 157th Ave WWTP | Goodyear | 2.9 | AZ0022357 | Mar 2027 | 1 |
| American Gulch Wastewater Treatment Plant | Payson | 0.79 | AZ0020117 | Apr 2027 | 0 |
| Cottonwood WWTF | Cottonwood | 1.02 | AZ0024716 | Apr 2027 | 17 |
| Tuba City WWTP | Tuba City | 0.44 | NN0020290 | Apr 2027 | 138 |
| Pima County - Ina Road WWTP | Tucson | 29.75 | AZ0020001 | May 2027 | 3 |
| Yuma Main Street Treatment Plant | Yuma | 0.09 | AZ0025411 | May 2027 | 1 |
| City Of Peoria | Peoria | 0.43 | AZ0024945 | Jul 2027 | 17 |
| Tusayan Sanitary District | Grand Canyon | 0.07 | AZ0026719 | Aug 2027 | 0 |
| Town Of Marana Water Reclamation Facility | Marana | — | AZ0024520 | Aug 2027 | 0 |
| Quartzsite, Town Of - WWTP | Quartzsite | 0.2 | AZ0023752 | Aug 2027 | 5 |
| Painted Mesa Water Reclamation Facility | Holbrook | — | AZ0025542 | Nov 2027 | 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 October 26, 2026.
Wastewater terms: NPDES permit · POTW · Biological nutrient removal · Tertiary treatment · Equalization tank · Centrate · all terms
Cite this page
Journalists, researchers and educators are welcome to quote these figures. Please credit Klarifi as the source and link to this page.
Klarifi. “NPDES permits expiring in 2027: Arizona wastewater plants.” Updated October 26, 2026. https://klarifi.io/facilities/arizona/permits-expiring/2027Need a custom cut of the data for a state, a county or a list of plants? Email info@klarifi.io.