San Diego backflow testing statistics, 2026

2026 San Diego Backflow Testing Tester Index

The 2026 San Diego Backflow Testing Tester Index found 199 company listings on the City of San Diego Public Utilities Department approved backflow tester list last updated 08/26/2026, which collapse to 198 unique company names after case-folding (ACCO Engineered Systems appears twice, with two different phone numbers).

Pulled 2026-11-10. This is a count of published public records, not a bid from San Diego Backflow Testing, not a diagnosis, and not a promise that a named firm will arrive.

Published figures from named sources

• The City of San Diego requires an approved tester to check backflow assemblies at installation, annually after installation, and after any relocation. City of San Diego Public Utilities, Cross-Connection FAQ (current).
• The first annual-test notice is mailed 45 days before the due date. City of San Diego Public Utilities, Cross-Connection FAQ (current).
• The second annual-test notice is mailed 15 days before the due date. City of San Diego Public Utilities, Cross-Connection FAQ (current).
• A five-day notice of water service termination is mailed on the due date. City of San Diego Public Utilities, Cross-Connection FAQ (current).
• The approved tester list is updated twice a year. City of San Diego Public Utilities, Approved Tester List (2026).

How the index was counted

The source file is the City of San Diego “Approved Tester’s List” PDF at sandiego.gov, last updated 08/26/2026, downloaded 2026-11-10. Each line that ends in a US phone number was counted as one listing (199). Company names were then case-folded; ACCO Engineered Systems / Acco Engineered Systems is the only duplicate, listed at (858) 264-8859 and (858) 695-3977, which leaves 198 unique names.

The PDF states that the list contains companies whose associates have been certified as backflow testers by AWWA, ABPA, or ASSE, and that the city makes no other representation about those testers. The extracted company-and-phone table is in this repository under seo-experiment/data/stat-pages/sandiego/.

What the list does not tell you

A listing is not a price, a pass rate, or a promise that the named company will take your annual backflow test. Other water agencies in the San Diego DMA — including cities and districts outside the City of San Diego — keep their own tester lists and mail their own letters. Follow the letterhead you received.

Typical single-device test ranges mentioned elsewhere on this site are market talk, not figures from the tester PDF. The PDF does not publish fees. RPZ testing and failed-test repair remain request pages.

Related service requests

These are narrower request pages on this site, not a list of partner shops. A licensed local provider may contact you if they accept a lead.

• Annual backflow test requirements
• RPZ testing
• Failed test repair
• Irrigation backflow testing