Find Smog Check Stations in All 50 States
Browse our comprehensive directory of certified emissions testing facilities across the United States. Select your state to find nearby stations.
U.S. Smog Check Requirements by State
Smog check requirements vary significantly across the United States, with 35 states currently mandating emissions testing programs for certain vehicles. These requirements typically depend on factors including vehicle age, location within the state, and local air quality conditions. Understanding your state's specific regulations helps ensure compliance and avoid registration delays.
States with Smog Check Programs
The majority of states with emissions testing programs focus on densely populated urban areas where vehicle emissions significantly impact air quality. California maintains the most comprehensive program, testing over 10 million vehicles annually. Other states like New York, Texas, and Illinois implement county-specific testing targeting major metropolitan regions.
States Without Requirements
Fifteen states currently have no statewide emissions testing requirements. These states generally feature lower population density, better natural air circulation, or have determined that other pollution control strategies provide sufficient environmental protection. However, some may still require safety inspections separate from emissions testing.
Important Note
Even if your state doesn't require smog checks, relocating to a state with testing requirements means your vehicle must pass emissions testing for registration. Always verify current requirements when moving between states or purchasing out-of-state vehicles.
Find Smog Check Stations in Your State
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