Mill Valley Smog Check Test Only Center is located in 570 Redwood Hwy Mill Valley . We are a California State certified Smog Check station and can provide service for all vehicles. Whether its a Test Only, Gross polluter, Out of State registration, or just a regular smog check, our facility can handle it. Our ASE Certified technicians operate two State-of-the Art Smog testing equipment, so there's never a wait time. Also, we have now been awarded as a Star Certified Station.