Irvine Ranch Water District: backflow testing rules
Serves Irvine, CA. 6 points from Irvine Ranch Water District's own pages, read October 7, 2026, each linked to the page it came from.
Irvine Ranch Water District at a glance
- When the test is due
- State health rules require each assembly to be tested every year by testers approved by the Orange County Health Care Agency. Source.
- How the report is filed
- IRWD's test and maintenance report form is distributed to IRWD, the Orange County Health Care Agency and the customer; IRWD's copy goes to backflowtest@irwd.com. Source.
- Approved testers
- 80 companies on Irvine Ranch Water District's own list, read October 6, 2026, each with a "Utility-Approved Tester" badge on its card here. The list.
Who must test
- Residential, commercial and industrial customers with a high potential for contamination must install and maintain backflow assemblies; IRWD decides case by case and notifies the customer. Source.
- Anyone with an in-ground sprinkler or irrigation system must have an approved backflow prevention assembly, such as a pressure vacuum breaker or reduced pressure assembly. Source.
Tester registration
- Testing is done by backflow assembly testers approved by the Orange County Health Care Agency. Source.
Approved testers
- IRWD posts a Backflow Assembly Testers list (updated June 2026) at irwd.com. Source.
Program
- IRWD's service area has more than 17,000 backflow prevention assemblies on water services, and its cross-connection staff answer questions at 949-453-5761. Source.
From notice to filed report, the steps are the same everywhere: how a backflow test goes.
Other water utilities in California
- Los Angeles Department of Water and Power
- East Bay Municipal Utility District
- City of San Diego Public Utilities Department
- San Jose Water
- City of Fresno Department of Public Utilities
- Long Beach Utilities
- Burbank Water and Power
- City of Modesto Utilities
Read October 7, 2026. Program page: irwd.com.