On Aug. 26, 2026, a new comment period begins for the proposal to renew an air quality control permit to BHP Copper Inc. for the continued operation of the BHP Miami Unit located in Gila County, Arizona. The comment period ends Sept. 25, 2026.

Class II Air Quality Permit Renewal No.: 113015

Permittee:

BHP Copper Inc.

Facility:

BHP Miami Unit

200 E. Live Oak Street

Miami, Arizona, 85539

Gila County

The facility is subject to the requirements of federal and state clean air regulations. The facility includes four simple cycle combustion turbines and emits the following air contaminants: coarse particulate matter with diameters 10 micrometers or less (PM₁₀), fine particulate matter with diameters 2.5 micrometers or less (PM_2.5), volatile organic compounds (VOCs), nitrogen oxides (NO_X), sulfur dioxide (SO₂), carbon monoxide (CO) and hazardous air pollutants (HAPs) and sulfuric acid (H₂SO₄) mist.

Review Documents:

• Original Published Public Notice | View Notice > 
• Draft Permit | View Permit >  
• Draft Technical Support Document (TSD) | View TSD >
• Permit Application | View App. >
• In person at:
  • ADEQ Record Center | Learn How >
  • City of Miami, Clerk’s Office, 500 W. Sullivan Street, Miami, AZ 85539

Public Comment Period:

Dates: Aug. 26, 2026 – Sept. 25, 2026

Comments may be submitted as follows:  

• By Email | Send Email >
• By Mail (Must be postmarked or received by Sept. 25, 2026):

ADEQ
Air Quality Division, Air Permits

Attn: Karla Murrieta
1110 W. Washington St.
Phoenix, AZ  85007