| Business | Phone |
| A1 Smog Test Only Center 3573 1st St # C, Livermore 94551 | (925) 449-2164 |
| Cactus Car Care & Smog 1253 Portola Ave, Livermore 94551 | (925) 294-8288 |
| First Street Smog 4001 1st St, Livermore 94551 | (925) 960-1701 |
| Quik Smog 3985 1st St, Livermore 94551 | (925) 961-0300 |
| Tri Valley Test Only Center 1739 1st St, Livermore 94550 | (925) 373-2882 |