PUBLIC NOTICE | Proposed Renewal AZPDES Permit for Tres Rios Wastewater Reclamation Facility in Pima County

Public Notice No. 21-41

Published in: Daily Territorial on April 1, 2022

AZPDES Permit No. AZ0020001

ADEQ proposes to issue an Arizona Pollutant Discharge Elimination System (AZPDES) renewal permit to discharge pollutants to Protected Surface Waters to the following applicant, subject to certain effluent limitations and special conditions:


Pima County Regional Wastewater Reclamation Department

Facility Information

Tres Rios Wastewater Reclamation Facility
7101 N Casa Grande Hwy
Tucson, AZ 85743
Pima County

Pima County Regional Wastewater Reclamation Department applied for a renewal AZPDES permit for the proposed discharge of up to 50 million gallons per day (mgd) of treated domestic wastewater from the Tres Rios Wastewater Reclamation Facility (WRF) to the Santa Cruz River in the Santa Cruz – Rio Magdalena-Rio Sonoita River Basin in Township 13 S, Range 12 E, Section 1, in Pima County, Arizona. The Tres Rios WRF is a publicly owned treatment works that receives domestic wastewater from residential, commercial, and industrial sources in the Tucson metropolitan area. Sludge is stabilized in an aerobic digester and then dewatered for land application or landfill disposal.

Review Documents

Original Published Public Notice | View/Print > 
Draft Permit | View/Print >
Draft Fact Sheet | View/Print >

You may also review the above documentation in person at the ADEQ Record Center | Learn How >

Public Comment Period 

Dates: April 1, 2022 – May 2, 2022

Comments may be submitted as follows:
     By Email | Send Email >   
     By Mail (Must be postmarked or received by May 2, 2022):

       Rachel Heinz
       Water Quality Division
       1110 W. Washington Street
       Phoenix, AZ 85007

A public hearing request must be in writing and must include the reasons for such request.