| Business | Phone |
| California Smog 22 E 8th St, Tracy 95376 | (209) 836-2947 |
| Costa Automotive 480 E 11th St, Tracy 95376 | (209) 835-3068 |
| Great American Smog Test Center 474 W Grant Line Rd, Tracy 95376 | (209) 835-8700 |
| Joe's Smog Shack 500 E 10th St # E, Tracy 95376 | (209) 836-4766 |
| Sixth Street Test Only 497 E 6th St # H, Tracy 95376 | (209) 836-3122 |
| Tracy Smog Center 10 W Grant Line Rd, Tracy 95376 | (209) 834-2760 |