Posted on: Sept. 23, 2024 - 7:00 a.m.

On Sept. 23, 2024, the comment period begins for the proposed 2024 PM_2.5 National Ambient Air Quality Standard (NAAQS) Boundary Recommendations Draft Report and Technical Support Document (TSD). The draft recommendations, and TSD, propose areas for nonattainment, attainment, and unclassifiable designations throughout the state for the 9.0 micrograms per cubic meter (µg/m³) NAAQS. The comment period ends Oct. 24, 2024.

Background

On Feb. 7, 2024, the U.S. Environmental Protection Agency (EPA) revised the primary annual NAAQS for fine particulates (PM_2.5) from 12.0 micrograms per cubic meter (µg/m³) to 9.0 µg/m³. As a result, ADEQ developed its proposed boundary recommendations describing the geographic extent of attainment, nonattainment, or unclassifiable areas of the state with respect to the revised annual PM_2.5 standard.

Review Documents:

• Original Published Public Notice | View >
• ADEQ’s Proposed Draft PM_2.5 Boundary Recommendation | View >
  • Appendix A: PM_2.5 2024 NAAQS Boundary Recommendation Technical Support Document | View >
  • Appendix B: PCAQCD’s Appendix F to the 2024 Annual Monitoring Network Plan | View >
  • Appendix C: Responses to informal comments received during consultation on draft boundaries | View >
• 2024 Revised Primary (Health-Based) National Ambient Air Quality Standard for PM_2.5 Webpage | Learn More >
• Or in person at the ADEQ Record Center | Learn How >
  

Public Comment Period:

Dates: Sept. 23, 2024 – Oct. 24, 2024

Comments may be submitted as follows:

• By Email | Send Email >     
• By Mail (Must be postmarked or received by Oct. 24, 2024):

ADEQ
Air Quality Division, Air Quality Improvement Planning Section
1110 W. Washington St.
Phoenix, AZ  85007

• At Hybrid Public Hearing | Oct. 24, 2024 | 11 a.m. | View Details >