| Business | Phone |
| Airx 2472 Eastman Ave # 34, Ventura 93003 | (805) 644-1099 |
| Aquatic Testing Laboratories 4350 Transport St # 107, Ventura 93003 | (805) 650-0546 |
| Btc Us Laboratories Inc 2978 Seaborg Ave, Ventura 93003 | (805) 656-6074 |
| Health Line Clinical Labs Inc 2807 Loma Vista Rd # 103, Ventura 93003 | (805) 648-7047 |
| Industry Standards Testing Lab 4160 Market St # 11, Ventura 93003 | (805) 642-4232 |
| Particle Measurement Tech Co 4882 Mcgrath St # 260, Ventura 93003 | (805) 644-8884 |