Backflow Base / Every state / California / San Jose
Backflow testing software for San Jose, California.
For testing companies working San Jose's 997,368 people: booking, routes, the field test, and the report to the water system.
Water systems based in San Jose
- San Jose Water1,039,920 people served
- Cws - Bakersfield268,129 people served
- California Water Service - Stockton182,775 people served
- City of Bakersfield,171,108 people served
- Suburban Water Systems-San Jose170,523 people served
Plus 61 smaller systems based here. Households near San Jose may be served by another system; Backflow Base matches each address to its own. All 2,783 in California →
Water systems: EPA SDWIS, active community systems, 2026-10-19. Population: Census Bureau 2024 estimates.
Testing companies in San Jose
44 companies on the tester lists of 1 water system. The first 25:
- $75 Backflow Testing
- 4th of July Backflow Testing
- A Better Backflow Company
- AAA Backflow Prevention Services
- AAA Facility Services
- ACME Bay Area Backflow
- Agile Backflow Solutions
- All American Backflow
- Alliance Backflow Services
- AM Backflow
- Backflow Prevention Specialists
- Backflow Team LLC
- Backflow Unlimited
- Bay and Valley Backflow Services
- Bay Area Backflow, Inc.
- Bay Line Plumbing
- Buckley Plumbing & Engineering, Inc.
- Carrera Backflow Specialists
- Century Commercial Service
- Certified Backflow Assy. Testing, LLC
- Ciari Plumbing & Heating
- City Certified Backflow Prevention, Inc.
- CMS Plumbing, Inc.
- Evergreen Landscapes
- Flow City Plumbing
From San Jose Water. Checked October 19, 2026. A list shows who may test, not who is good; ask the water system for its current list.
Other California cities
- Los Angeles →3,878,704 people
- San Diego →1,404,452 people
- San Francisco →827,526 people
- Fresno →550,105 people
- Sacramento →535,798 people
- Long Beach →450,901 people
- Oakland →443,554 people
- Bakersfield →417,468 people
- Anaheim →344,561 people
- Stockton →324,975 people
- Riverside →323,757 people
- Irvine →318,683 people
The software
- Bookings from a booking page, your own website, and an AI receptionist on your phone.
- Schedule board and route for each tester.
- Field app that scores every test, even with no signal.
- Test reports sent to the water system that serves each address.
- Card payments to your own Stripe account, and yearly renewals that charge after the test.
- Client portal for HOAs, property managers and contractors.
- $50/month flat: no per-test fee, no cut of payments.
- Every feature →What the app does, part by part.
- Compare →Next to other backflow and field-service software.
- Start free →No card. $50/month or $500/year once you go live, 45 days free.
- Free exam prep →Study questions, practice exams, device tests, a VR wet lab.