Arizona wastewater permits expiring in 2026
9 NPDES permits · 2 MGD combined average flow
9 publicly owned wastewater treatment plants in Arizona hold NPDES permits that expire during 2026, 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 | Technology | Violations (3y) |
|---|---|---|---|---|---|---|
| Town Of Kearny Wastewater Reclamation Facility | Kearny | 0.1 | AZ0024449 | Jul 2026 | Biogas silos | 49 |
| Ganado WWTP | Ganado | — | NN0022195 | Jul 2026 | Aerated lagoons, Uncovered lagoons | 0 |
| Window Rock Wastewater Treatment Facility | Fort Defiance | 0.39 | NN0021555 | Sep 2026 | Aerated lagoons, Uncovered lagoons | 15 |
| Bullhead City, City Of - Section 10 WWTP | Bullhead City | — | AZ0026808 | Oct 2026 | Clarifiers, Uncovered lagoons, Carrousels / oxidation ditches | 0 |
| Whiteriver Sewage Lagoon | Whiteriver | 0.58 | AZ0024058 | Oct 2026 | — | 486 |
| Tucson Airport Remediation Project - Co-Mingled Plume | Tucson | 0.56 | AZ0026417 | Oct 2026 | — | 0 |
| Benson, City Of - WWTF | Benson | — | AZ0026026 | Nov 2026 | Clarifiers, Uncovered lagoons, Carrousels / oxidation ditches | 0 |
| Joint Venture WWTF | Parker | 0.54 | AZ0021415 | Nov 2026 | Uncovered lagoons | 165 |
| City Of Kingman - Downtown Pond | Kingman | 0.23 | AZ0026018 | Dec 2026 | — | 7 |
Arizona permit renewals in 2026: 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.