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EFFECTIVEIdahoJul 1, 2023High priority✓ Human reviewed

Idaho ended vehicle emissions testing in Ada and Canyon counties

CheckTreasure Valley shops that were emissions test stations or emissions-repair providers should stop testing, update customer communications, and stop relying on test-failure repair leads.
Applies toGeneral mechanical, Mixed services, Dealership fixed ops
Details & evidence

A 2022 Idaho law repealed the state vehicle inspection and maintenance (emissions testing) requirement effective July 1, 2023, ending mandatory testing in Ada and Canyon counties. EPA approved removing the Ada County program in 2023.

Official evidenceIdaho DEQ — Vehicle Emissions ↗ · verified Sep 21, 2026
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