Serving Ontario Since 2007
Got a test-due letter from the City of Ontario? That's our specialty. Atlas Backflow handles annual backflow testing for distribution centers, hotels, and new residential communities across Ontario — from Ontario Ranch to the airport-adjacent logistics parks and the Ontario Mills commercial district — and we file the results with your water purveyor so you don't have to chase paperwork.
If the test turns up a failure, our certified testers are also repair techs: trucks are stocked with parts for every major brand, so most the West End of San Bernardino County repairs and re-certifications happen in a single visit. We also design and install custom anti-theft cages for exposed assemblies.
Also Serving Nearby
Ontario Backflow FAQs
What does a backflow test cost in Ontario, CA?
Testing starts at $90 per device in Ontario, which covers the test itself, the compliance paperwork, and filing with City of Ontario. DCVA, PVB, RP/RPZ, SVB, and fire-line assemblies are all included at that rate.
Why did I get a backflow test notice from City of Ontario?
Water purveyors like City of Ontario are required by California cross-connection control regulations to have every backflow prevention assembly tested annually by a certified tester. Atlas Backflow performs the test and files the results for you.
Can a failed backflow device in Ontario be fixed the same day?
Usually, yes. Our trucks are stocked with rebuild kits and parts for every major make, so most repairs are completed on the first visit — with the re-certification test included.
Do you offer same-day backflow testing?
Yes — same-day testing is available in Ontario for an additional charge, and standard appointments are usually available within a few days. Call (562) 343-1436.
Failed device? Read what happens if your backflow device fails its test. Managing multiple properties? See our HOA & property manager program.