| Business | Phone |
| 15 Minute Smog 520 S Harbor Blvd, Fullerton 92832 | (714) 773-0550 |
| A & A Smogcheck 801 W Commonwealth Ave, Fullerton 92832 | (714) 992-4422 |
| Ace Smog Check Test Only 3950 W Commonwealth Ave # B, Fullerton 92833 | (714) 992-0777 |
| Sunnyside 76 2701 N. Brea Blvd, Fullerton 92835 | (714) 256-0773 |