Ontario Backflow Tests
A certified, locally based backflow prevention company serving Ontario, CA and 12 surrounding cities across San Bernardino and Los Angeles Counties.
A Backflow Specialist Rooted in Ontario
Ontario Backflow Tests was founded to solve a problem we kept seeing firsthand: property owners and facility managers receiving delinquency notices from City of Ontario Utilities and neighboring water districts simply because they didn't know annual testing was required — or couldn't find a responsive local provider who understood the unique demands of Ontario's warehouse and commercial corridor.
Our approach is straightforward — show up when we say, file reports on your behalf, repair on the same visit when possible, and communicate clearly about what was done and why. No surprises. No runaround.
Operating from Ontario, CA puts us at the center of our service area — within 15 miles of all 12 cities we serve. That proximity means faster response times and genuine familiarity with City of Ontario Utilities requirements and the reporting procedures of every water district in the region.
"Our mission is simple: make backflow compliance as easy as possible for every property owner and facility manager we serve. We handle the technical work and the paperwork — you simply confirm the appointment."
— Ontario Backflow Tests Team
Work From the Field
A look at some of the jobs we handle — from residential assemblies to large commercial and warehouse backflow systems.
Why Property Owners Choose Ontario Backflow Tests
Certified Backflow Technicians
All technicians hold active state certifications. We stay current on City of Ontario Utilities and all neighboring district requirements.
Available 24/7
Backflow compliance deadlines don't follow a schedule, and neither do we. Available every day of the week.
Direct Report Filing
We file results directly with City of Ontario Utilities and all 12 service area districts on your behalf — no forms, no trips to the water department.
Same-Day Repair & Retest
We carry parts for all major brands including Watts, Febco, Wilkins, and Ames. If your device fails, we repair and retest on the same visit.
Locally Based in Ontario
Centrally located in San Bernardino County. Local knowledge means faster response and familiarity with every water district in the area.
Transparent, Honest Service
Straightforward assessment and honest recommendations. If repair is cheaper than replacement, we'll say so. No upselling, no surprises.
Our Services
Backflow Testing
Annual certified backflow testing required by California law. We test your assembly, certify results, and file directly with your water district.
Learn More →Backflow Repair
On-site backflow repair when your device fails inspection. We carry parts for all major brands and retest on the same visit.
Learn More →Backflow Installation
Professional installation of new backflow prevention assemblies for residential, commercial, and industrial properties.
Learn More →Backflow Replacement
Full replacement of aging or failed backflow prevention devices. We remove, install, test, and file all paperwork.
Learn More →Annual Compliance Management
We track your annual testing deadlines, schedule appointments, and file reports — so your properties stay compliant year after year.
Learn More →Ready to Schedule Backflow Service?
Call us directly or use our online form. We serve 12 cities across San Bernardino and Los Angeles Counties — available 24/7.
Request Service
Available 24/7. We respond promptly.