EPA approves Maricopa County plan letting cleaner vehicle fleets earn pollution credits
EPA added Maricopa County's voluntary credit rule, adopted locally earlier, to Arizona's federally enforceable air plan. Fleet owners who permanently cut nitrogen oxide or volatile organic compound emissions by retrofitting or replacing on-road vehicles can earn credits, which large new or expanding plants can use to offset added pollution in their permits.
Who it affects
Vehicle fleet owners and large industrial plants in Maricopa County
When
This rule takes effect on December 7, 2026.
- : Published in the Federal Register
- : This rule takes effect
Official text
FR Doc. 2026-22647: Air Plan Revisions; Arizona; Maricopa County Air Quality Department; New Source Review; Emission Reduction Credits
On Federal Register. The official text is what counts; read it before you act.
Not legal advice. Plain-English summaries to help you find what changes and when. Not legal advice: read the official text, and ask a lawyer about your situation.