Official list entries
Authority-first tester table
Use the governing authority list first. Provider profiles and sponsor routing remain secondary to the official approval context.
| Full name | License notes | Company or label | Review date |
|---|---|---|---|
| BAVCO | County-certified tester directory entry used for Pasadena routing and also listed on IRWD and San Diego official tester rosters. | Southern California tester profile grounded in county-certified and utility-published rosters. | 2026-04-05 |
| One Flow Backflow Inc. | Official tester listed on IRWD's district roster and on San Diego's approved tester list. | Southern California tester profile grounded in IRWD and San Diego rosters. | 2026-04-05 |
| American Backflow Services | Official IRWD backflow tester list entry from the district's convenience roster. | Officially listed on IRWD's tester PDF. | 2026-04-05 |