| Business | Phone |
| Advanced Test Only Center 1466 E Foothill Blvd # K, Upland 91786 | (909) 981-6981 |
| Express Smog & Lube 825 N Central Ave # A, Upland 91786 | (909) 931-3152 |
| Low Price Smog Check 1212 W Foothill Blvd, Upland 91786 | (909) 982-7754 |
| Low Price Smog Check 193 S Euclid Ave, Upland 91786 | (909) 949-9970 |
| Z Smog 1290 W 9th St, Upland 91786 | (909) 949-6930 |