There are currently 30 states and the District of Columbia that have Inspection/Maintenance programs in the United States and the 2 programs in Canada. Highlights of the program data are contained herein. 


American States With I/M Programs:


Canadian Provinces or Territories With I/M Programs:

British Columbia




American States Without I/M Programs:


Alaska (ended Mar 2012)


Florida (ended Jun 29, 2000)




Kentucky (ended Nov 2005)

Michigan (ended Jan 1, 1996)





North Dakota

Oklahoma (ended May 2001)

South Carolina

South Dakota


West Virginia




Canadian Provinces or Territories Without I/M Programs:



New Brunswick

Newfoundland and Labrador

Northwest Territories

Nova Scotia


Prince Edward Island






This update has been prepared by the Equipment and Tool Institute. Please note the following precautions:

·         I/M program definition, requirements and personnel can change quickly based on local politics and SIP changes.

·         Although appropriate efforts have been made to maintain the accuracy of the information in this update, errors and/or omissions may be present.

·         ETI does not warrant the information contained in this document. Readers use the enclosed information at their own risk.


For general comments or suggestions, or errors or omissions, please contact Trisha Doornbosch, ETI Administrator for ETI at or call at 815-520-1933. For a list of updates, see the Change Log.


All information in this document is copy written by ETI and can be reproduced only with written permission.



Vehicle Emissions are regulated by two main agencies in The United States:


1. The United States Environmental Protection Agency (EPA)

Here are some links from EPA's web site that might be useful for research.


Light Duty Info:

Consumer Information

Regulations and Related Documents

On-Board Diagnostics

Vehicle Service Information

Vehicle Programs and Compliance Guidance Letters

Certification and Fuel Economy Information System

Motor Vehicle and Engine Compliance Program Fees Information

Importing Vehicles and Engines

Light-Duty Automotive Technology and Fuel Economy Trends: 1975 Through Present

Related Links


Heavy Duty Info:

Heavy Trucks, Buses, and Engines
This website presents general information about heavy - duty highway engines, such as trucks and buses, and their emissions.

Emission Standards Reference Guide for Heavy - Duty and Nonroad Engines
Provides information on emission standards for nonroad engines and heavy - duty engines.

Clean School Bus USA
Provides information about Clean School Bus USA.


2. California Air Resources Board:

Here are some links from CARB's website that might be useful for research:


What the ARB Does

Programs for cleaner air range from research and regulation to enforcement and education. The ARB:

Sets and enforces emission standards for motor vehicles, fuels and consumer products.

Sets health-based air quality standards.

Conducts research.

Monitors air quality.

Identifies and sets control measures for toxic air contaminants.

Provides compliance assistance for businesses.

Produces education and outreach programs and materials.

Oversees and assists local air quality districts which regulate most non-vehicular sources of air pollution.