Maricopa County’s New Rule 205 Set to Enhance Air Quality and Economic Growth
In a significant move towards better air quality and economic advancement, the Maricopa County Air Quality Department (MCAQD) has announced a pivotal development. The U.S. Environmental Protection Agency (EPA) is considering the approval of new emission reduction credits related to mobile-source emissions. This initiative, if sanctioned, would integrate the Maricopa County-developed Rule 205 into the Arizona State Implementation Plan (SIP).
Maricopa County Board of Supervisors Chair, Kate Brophy McGee, remarked, “Rule 205 reflects Maricopa County’s commitment to cleaner air and a strong economy.” The rule, introduced in May 2025, enables fleet owners to earn emission reduction credits (ERCs) by upgrading or substituting older, high-emission vehicles with cleaner alternatives. These credits can then be used to offset emissions from burgeoning industrial sources, aligning with the Clean Air Act’s nonattainment New Source Review program.
The innovative approach was applauded by Vice Chair Debbie Lesko, who emphasized, “I applaud our Air Quality Department for this innovative approach to ensuring that federal air quality policy fairly reflects the unique challenges facing our community.”
Supervisor Thomas Galvin highlighted the synergy between business growth and environmental stewardship by stating, “Maricopa County is a clear example that businesses can thrive without sacrificing air quality.” With Rule 205, Maricopa County aims to deliver measurable improvements in air quality while fostering business investment and expansion.
Supervisor Mark Stewart underscored the dual benefits of the rule: “This is exactly the kind of win-win we should be pursuing, strengthening our economy while delivering cleaner air for our residents.” Similarly, Supervisor Steve Gallardo pointed out the importance of community health and economic support, expressing optimism for future innovations that align with the Clean Air Act.
MCAQD Director Philip McNeely described Rule 205 as an innovative strategy that transforms voluntary investments in cleaner fleets into certified emission reductions, thereby supporting both air quality improvement and economic development.
For additional details on Rule 205 and related MCAQD initiatives, visit Maricopa.gov/4562/Emission-Reduction-Credit-Program.
About Maricopa County Air Quality Department
The mission of MCAQD is to enhance the air quality of Maricopa County, ensuring a healthy environment for residents and visitors. Governed by the Maricopa County Board of Supervisors, the department adheres to the air quality standards dictated by the federal Clean Air Act. For more information on air quality, visit Maricopa.gov/AQ.
Stay updated with MCAQD’s initiatives through their social media channels: Instagram, X, Facebook, Nextdoor, and LinkedIn.
Also, download the MCAQD’s Clean Air app available on iPhone, iPad, and Android.
Read More Here
