​Welcome to Terry's Testing! 
Here at Terry's Testing, we treat our customers like family – the kind you actually like spending time with! As a family-owned business, we pride ourselves on delivering top-notch services with a personal touch. When you work with us, you’re not just another client; you are part of the Terry’s Testing clan. So, kick back, relax, and let us handle the testing – we promise not to ask you to wash the dishes afterward!

​Providing certified backflow testing in: 

San Bernardino, Los Angeles, Riverside, and Orange Counties

Los Angeles: Artesia, Azusa, Beverly Hills, Carson, Covona, Diamond Bar, Industry ...

Orange: Anaheim, Orange, Huntington Beach, Irvine, Mission Viejo....

San Bernardino: Chino, Chino Hills, Ontario, Fontana...

Riverside: Corona, Hemet, Moreno Valley, Temcula ...