Download your $30 OFF Coupon from our website www.allstarsmogantioch.com We are open Monday to Friday 9am to 5pm and Saturday 9am to 3pm. All Star Smog Antioch is a STAR certified Test Only Station serving Contra Costa County and surrounding areas. Our company is licensed and certified to provide professional inspections that can be utilized for locating areas within the vehicle that may be causing high levels of pollution from being emitted into the environment. We offer Smog Checks for all DMV Smog Test, Smog Inspection, Smog Test only Certification. With over 10 years of experience our mission is to service our community by being an honest and dependable company that the community can trust.