10/06/2026
Arizona’s next wave of manufacturing jobs and business investment depends on solving a real challenge: how to keep growing while protecting the air our families breathe.
Senate President Warren Petersen, President Pro Tem T.J. Shope, Majority Whip Frank Carroll, and Congressman Andy Biggs joined EPA Administrator Lee Zeldin in Phoenix for a roundtable and press conference highlighting a locally developed solution, EPA’s proposed approval of Maricopa County’s Rule 204.
To build or expand, major industrial facilities in areas that don’t meet federal air quality standards must offset the additional pollution they would produce. That means securing real reductions in pollution elsewhere.
Rule 204 would provide another way to do that.
When fleet operators voluntarily replace older off-road engines or upgrade them with cleaner technology, their verified pollution reductions could become credits. New or expanding facilities could use those credits to meet their emissions requirements.
In everyday terms, cleaner equipment helps make room for new jobs and investment. Those reductions must be real, measurable, permanent, and enforceable. Clean air requirements still apply.
The proposal builds on EPA’s earlier proposed approval of Rule 205, which takes a similar approach with vehicle fleets.
TSMC, U-Haul, the Arizona Chamber, other business execs, county leaders, and representatives from the Governor’s Office joined the discussion about supporting economic opportunity while protecting public health.
This is federalism in action, with solutions developed here in Arizona and federal partners in the Trump Administration working with us to move them forward. Bipartisan cooperation can deliver practical results for the people we serve: room for businesses to grow, opportunities for workers, and protection for our air.
