By Staff Reporter |
The Trump administration greenlit another one of Maricopa County’s plans to incentivize clean air improvements.
The county plans to encourage the railroad and construction industries to voluntarily upgrade or replace their nonroad vehicles with cleaner emissions technologies through Maricopa County Rule 204.
The rule represents another effort to bring the county closer to compliance with the 2015 ozone standard of 70 parts per billion outlined by the federal Clean Air Act.
Maricopa County reported that it is currently designated as a moderate non-attainment area under the standard. Under the Biden administration in 2024, the Environmental Protection Agency (EPA) began to consider whether the Phoenix area warranted reclassification as a serious non-attainment area.
However, the EPA determined earlier this year that the county would have attained standards had it not been for international emissions, namely from Asia and Mexico.
The Maricopa Association of Governments reported that it found through modeling with the EPA that approximately 80% of regional ozone originates from natural sources or outside Arizona.
The EPA determination from this year spared the county from the burden of additional air quality regulations, which would have slowed and potentially reversed industry growth in the region.
The region has reported reduced local emissions of air pollutants by 50% since 2000. The county also reported on Tuesday that total emissions statewide have fallen by more than 70% since 1990, despite the population more than doubling.
On Tuesday, EPA Administrator Lee Zeldin participated in a press conference to announce the incentives alongside Maricopa County officials, including Board of Supervisors Chair Kate Brophy McGee and Republican attorney general nominee Warren Petersen.
Zeldin remarked that Maricopa County’s approach to emissions reduction has been successful.
“They aren’t increasing emissions,” repeated Zeldin. “They are not breaking federal requirements. They are finding new, innovative ways to work within their circumstances.”
Brophy McGee pledged that the new county rule would maintain county residents’ quality of life and would not hinder economic development.
“This plan demonstrates how a healthy environment and growing economy can work together,” said Brophy McGee. “By incentivizing rather than punishing job creators, implementing Maricopa County’s Rule 204 will improve the quality of the air we breathe while enabling key industries to continue investing in our community. I thank Administrator Zeldin and the EPA for working with Maricopa County and our business community on this innovative approach.”
Danny Seiden, president and CEO of the Arizona Chamber of Commerce, called the rule “smart policy” that ensured a win-win for the economy and air quality.
“For more than a decade, Arizona’s business community has worked to expand the tools available to reduce emissions while giving companies a workable path to invest, expand and create jobs,” said Seiden. “Rule 204 does exactly that: when businesses voluntarily replace older equipment with cleaner technology and achieve real, measurable emissions reductions, those reductions can help make continued economic growth possible.”
In April, the EPA approved Maricopa County Rule 205, another incentive which provides emission reduction credits to fleet owners and operators who upgrade or replace on-road vehicles with cleaner technologies.
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