Horizon Smog is one of the best smog stations. Come here for the best price and service. We offer free re-test for every car that doesn't pass. Horizon Smog also works with the DMV, if you are in need of tags and registration renewal, and don't want to spend the better part of your day in long lines HORIZON SMOG is the place to go. Located: 981 howard st. San Francisco, CA 94103 Phone#: 415-371-1900