Star Smog Depot, Colma

According to California's regulations, most vehicles need to be smog-checked every two years. However, drivers needn't worry as Star Smog Depot quickly comes to the rescue. The company consists of a team of licensed technicians who identify the amount and type of pollutants that the car releases during its ride. They then compare the results with the state's standards and give the certification to those vehicles that managed to fit within them.