Find local business specializing in emissions testing by searching on sites such as Yelp, Yellow Pages and Yahoo Local. As each state sets its own guidelines for emissions testing and regulations, drivers should check local government websites for information about certified emission testing centers as well.
Many automotive repair shops offer various types of emissions testing, though drivers should call a mechanic to ask about the available services before visiting in person. Sites such as Yelp allow users to search for business based on both keywords and a predetermined list of common service categories. Some states operate specialized stations that only perform emissions testing, but these vary between each state and city.