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Public Notice
Water Quality

On Oct. 16, 2022, the public comment period begins for the preliminary decision to issue a significant amendment to an Aquifer Protection Permit (APP) to Freepport-McMoRan Sierrita,  Inc., for the Freeport-McMoRan Sierrita Property located in Pima County, Arizona. The comment period ends on Nov. 16, 2022.

Public Notice Information

Published in: Green Valley News on Oct. 16, 2022

Pursuant to Arizona Administrative Code, Title 18, Chapter 9, Article 1, the ADEQ Director intends to issue a significant amendment to an Individual Aquifer Protection Permit (APP) to the following applicant:


Freeport-McMoRan Sierrita Property

The Sierrita Property encompasses Sierrita Mine and Twin Buttes Mine, and is located near Green Valley, Pima County, Arizona over groundwater of the Upper Santa Cruz Basin.

Permit Information

Individual Aquifer Protection Permit No. 101679, LTF No. 94253


Freeport-McMoRan Sierrita, Inc.

Review Documents

Original Published Public Notice | View/Print >
Draft Permit | View >
Draft Executive Summary | View >

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

Public Comment Period 

Dates: Oct. 16, 2022 - Nov. 16, 2022

Comments may be submitted as follows:

     By Email | Send Email >  
     By Mail (Must be postmarked or received by Nov. 16, 2022):

       Meisam Peiravi
       Groundwater Protection
       1110 W. Washington St.
       Phoenix, AZ  85007