On Sept. 29, 2026, a new comment period begins for the proposal to issue an air quality control permit to Minerals Research, Inc., for the operation of a copper slag processing facility located in Yavapai County, Arizona. The comment period ends Nov. 30, 2026.

Class II Air Quality Permit No. 100924

Permittee:

Minerals Research, Inc.

Facility:

Minerals Research, Inc.
705 E. Birch Street
Cottonwood, Arizona 86326
Yavapai County

The facility is subject to the requirements of federal and state clean air regulations. The facility 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).

Review Documents:

• Original Published Public Notice | View Notice > 
• Revised Permit Application/Modeling Overview | View Revised App. >  
• Orginal Permit Application/Modeling Overview | View App. > 
• Draft Permit | View Permit >  
• Draft Technical Support Document (TSD) | View TSD >
• In person at:
  • ADEQ Record Center | Learn How >
  • Cottonwood City Clerk’s Office, 824 N. Main Street, Cottonwood, AZ 86326

Public Comment Period:

Dates: Sept. 29, 2026 – Nov. 30, 2026

Comments may be submitted as follows:  

• By Email | Send Email >
• By Mail (Must be postmarked or received by Nov. 30, 2026):

ADEQ
Air Quality Division, Air Permits

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

• At the Public Hearing in Cottonwood, Arizona | Wednesday, Nov. 18, 2026, 5:30 p.m. | View Details >

On Sept. 28, 2026, the comment period begins for the proposal to renew an Arizona Pollution Discharge Elimination System (AZPDES) permit to the City of Bullhead City for the Section 10 Wastewater Treatment Plant located in Mohave County, Arizona. The comment period ends Oct. 28, 2026.

AZPDES Permit No.: AZ0026808

Permittee: 

City of Bullhead City

Facility: 

Section 10 Wastewater Treatment Plant
901 Richardo Avenue
Bullhead City, Arizona 86442
Mohave County

Bullhead City applied for a renewal AZPDES permit for the proposed discharge of up to four (4) million gallons per day (MGD) of treated domestic wastewater from the Section 10 Wastewater Treatment Plant to the Colorado River in Mohave County, Arizona. The facility is a publicly-owned treatment works that receives domestic wastewater from residential and commercial sources in Bullhead City. Sludge is digested in an aerobic digester and dewatered in a belt filter press. Biosolids are landfilled at the Gambi 360 Landfill in Fort Mohave, Arizona.

Review Documents:

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

Public Comment Period:

Dates:  Sept. 28, 2026 – Oct. 28, 2026

Comments may be submitted as follows:

•      By Email | Send Email >
•      By Mail (Must be postmarked or received by Oct. 28, 2026):

ADEQ
Water Quality Division, Surface Water Protection Permits
Attn: Rachael Willis
1110 W. Washington St.
Phoenix, AZ  85007

On Sept. 28, 2026, the comment period begins for the proposal to renew an Arizona Pollution Discharge Elimination System (AZPDES) permit to the United States Department of Interior National Park Service for the North Rim Wastewater Treatment Plant (WWTP) located in Coconino County, Arizona. The comment period ends Oct. 28, 2026.

AZPDES Permit No.: AZ0110426

Permittee: 

United States Department of Interior, National Park Service

Facility: 

North Rim WWTP
30 Helibase Rd.
North Rim, AZ 85052
Coconino County

United States Department of Interior National Park Service applied for a renewal AZPDES permit for the proposed discharge of up to 0.060 million gallons per day (MGD) of treated domestic wastewater from the North Rim WWTP to Transept Canyon in the Colorado Grand Canyon River Basin in Township 33 N, Range 3 E, Section 34, in Coconino County, Arizona. The North Rim WWTP is a federally-owned treatment works that receives domestic wastewater from residential and commercial sources from the North Rim of the Grand Canyon. Sludge dried in beds on-site prior to transport to the South Rim WWTP for final composting, blending, and land application.

Review Documents:

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

Public Comment Period:

Dates: Sept. 28, 2026 – Oct. 28, 2026

Comments may be submitted as follows:

•      By Email | Send Email >
•      By Mail (Must be postmarked or received by Oct. 28, 2026):

ADEQ
Water Quality Division, Surface Water Protection Permits
Attn: Lora Walsh
1110 W. Washington St.
Phoenix, AZ  85007

On Sept. 24, 2026, the comment period begins for the preliminary decision to issue a significant amendment to an Individual Aquifer Protection Program (APP) Permit to the City of Goodyear for its soil aquifer treatment (SAT) and vadose injection program (VIP) recharge facility located in Maricopa County, Arizona. The comment period ends Oct. 24, 2026.

Aquifer Protection Permit (APP) No.:  P-511440

Permittee:

City of Goodyear

Facility:

City of Goodyear SAT and VIP Recharge Facility
15600 W. Yuma Road
Goodyear, Arizona 85338
Maricopa County

The purpose of this amendment is to authorize the expansion of the facility to increase the permitted discharge volume from 5.87 million gallons per day (MGD) to 7.34 MGD and replace a Point of Compliance groundwater monitoring well.

Review Documents: 

• Original Published Public Notice | View Notice >
• Draft Permit | View Permit >
• Draft Executive Summary | View Summary >
• In person at ADEQ Record Center | Learn How >

Public Comment Period:

Dates: Sept. 24, 2026 – Oct. 24, 2026

Comments may be submitted as follows:

• Online | Submit Comments >
• By Email | Send Email >
• By Mail (Must be postmarked or received by Oct. 24, 2026):

ADEQ
Water Quality Division, Groundwater and Reuse
Attn: Kayla Szafraniec
1110 W. Washington St.
Phoenix, AZ  85007 

On Sept. 23, 2026, the comment period begins for the Total Maximum Daily Load (TMDL) Report for the Upper Agua Fria Watershed, for metals in Big Bug Creek, Agua Fria River and Lynx Creek in Yavapai County, Arizona. The comment period ends Oct. 23, 2026.

A TMDL is a scientific determination of the maximum amount of a given pollutant that a surface water can assimilate and still meet the water quality standards that protect human health and aquatic life. The TMDL program is designed to help an impaired stream or lake meet its water quality standards and support its designated uses, such as protection of aquatic life, drinking water, or fish consumption |  Learn More >

Review Documents: 

• Original Published Public Notice | View Notice > 
• Draft Total Maximum Daily Load | View Report >  
• In person at the ADEQ Record Center | Learn How >

Public Comment Period:

Dates: Sept. 23, 2026 – Oct. 23, 2026

Comments may be submitted as follows:  

• Online | Submit Comments >
• By Email | Send Email >
• By Mail (Must be postmarked or received by Oct. 23, 2026):

ADEQ
Water Quality Division, Surface Water Sampling & Source ID
Attn: Clay Mansfield
1110 W. Washington St.
Phoenix, AZ  85007