Welcome to the California Smog Test information page

The intent of this website is to give you all the information you need to pass and be informed about the smog test requirement for the state of California. In order to get the most out of this website use the home page as a means to get to the different sections underneath. The important resources section on the right side has key official links.

What is the smog test and what's in it for me? Tell me a bit about the science behind smog Can you give me a step-by-step breakup of the smog test I have a special situation, in my case ... Dos and Don'ts that when followed will maximize your chances of passing the smog test Frequently Asked Questions