Does the United States have one national car inspection?
The EPA says inspection and maintenance testing is done by state and local agencies, and the program varies from area to area. The 1990 amendments to the Clean Air Act set emissions-inspection requirements for several areas of the country. This page links to each area's own program, including how often that area tests and which vehicles are covered.
Household
The library is always free. Official answers for the home, then the official page. Not advice.
Not legal advice. Always consult a professional.
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