| Business | Phone |
| Big T's Smog Center 6232 Auburn Blvd, Citrus Heights 95621 | (916) 722-1821 |
| Earth Station 7601 Greenback Ln, Citrus Heights 95610 | (916) 729-2223 |
| Earth Station Auto 7601 Greenback Ln, Citrus Heights 95610 | (916) 729-2223 |
| Smog Diagnostic Specialist 7548 Greenback Ln, Citrus Heights 95610 | (916) 728-4244 |
| Smog Masters 7920 Auburn Blvd, Citrus Heights 95610 | (916) 729-1500 |
| Smog Quick 7555 Auburn Blvd, Citrus Heights 95610 | (916) 729-1008 |
| Warren's Smog & Auto Repair 5900 Auburn Blvd, Citrus Heights 95621 | (916) 344-2274 |
| Smog-N-All 6717 Auburn Blvd, Citrus Heights 95621 | (916) 726-3546 |