| Business | Phone |
| 8th Street Test Smog Center 8520 8th St, Rancho Cucamonga 91730 | (909) 579-0300 |
| E Z Smog Inc 9395 9th St, Rancho Cucamonga 91730 | (909) 987-2300 |
| Rancho Smog Center 8730 Vineyard Ave, Rancho Cucamonga 91730 | (909) 579-0101 |
| Smog Stop 8840 Archibald Ave # D, Rancho Cucamonga 91730 | (909) 581-1980 |
| Test Only Smog 8760 8th St, Rancho Cucamonga 91730 | (909) 608-0090 |