On March 13, 2025, the comment period begins for the proposal to issue an Arizona Pollution Discharge Elimination System (AZPDES) renewal permit to Freeport-McMoRan Miami, Inc., Pinal Creek Project, for the Lower Pinal Creek Water Treatment Plant located in Gila County, Arizona. The comment period ends April 11, 2025.

AZPDES Permit No.: AZ0024350

Permittee:

Freeport-McMoRan Miami, Inc. Pinal Creek Project

Facility:

Lower Pinal Creek Water Treatment Plant
3515 Wheatfields Road
Globe, Arizona 85501
Gila County

Freeport-McMoRan Miami, Inc., Pinal Creek Project applied for a renewal AZPDES permit for the proposed discharge of up to 9.36 million gallons per day of treated groundwater from the Lower Pinal Creek Water Treatment Plant to the Pinal Creek, tributary to the Salt River, in Gila County, Arizona. The facility is operated as a remedial action at the Pinal Creek Water Quality Assurance Revolving Fund (WQARF) site.

Review Documents: 

• Original Published Public Notice | View >
• Draft Permit | View >
• Draft Fact Sheet | View >
• In person at the ADEQ Record Center | Learn How >

Public Comment Period:

Dates: March 13, 2025 – April 11, 2025

Comments may be submitted as follows:

• By Email | Email > 
• By Mail (Must be postmarked or received by April 11, 2025):

ADEQ
Water Quality Division, Surface Water Protection

Attn: Lesley Davidson
1110 W. Washington St.
Phoenix, AZ  85007