BackflowNear Test-Due Reminder

Backflow testing in Riverside and the Inland Empire

In Riverside and the Inland Empire, Riverside Public Utilities runs the backflow program: it sets who must test, when the report is due and how it is filed. 51 listed testing companies work within 30 miles of Riverside.

Each fact links the page it came from. Utility and state pages were read October 6 and 7, 2026.

Who has to test in Riverside and the Inland Empire

The rule depends on the utility that sends your water bill. Each line below is from that utility's own page.

  • Riverside Public Utilities: Assemblies must be tested right after installation, relocation or repair and at least once a year, at the customer's cost.

Source: Riverside Public Utilities

How each utility takes the test report

Most utilities here take the report online through a vendor portal; the tester files it. Open a utility for its own deadline, filing steps and fees.

UtilityReport filed throughApproved tester listPublished fee
Riverside Public UtilitiesTokayYes, loaded hereNone found

What testing costs in Riverside and the Inland Empire

No utility or testing company in the Riverside and the Inland Empire area has a published price on file here yet. Prices published elsewhere are in our cost guide; ask two or three companies below for a written quote.

If the test is missed

  • Riverside Public Utilities: Refusal or unnecessary delay in installing, testing, repairing or replacing a required assembly is grounds for terminating water service; the valve is locked until the violation is corrected.

Source: Riverside Public Utilities

California rules behind the local programs

State rules set the minimum; the utilities above add their own deadlines and tester registration.

  • Backflow prevention assemblies must be field tested at least once a year (CCCPH 3.3.3(b)); the water system, the State Water Board or a local health agency may require more frequent tests for high hazard premises.
  • Assemblies are also tested after installation, repair, depressurizing for winter or relocation (CCCPH 3.3.3(a)).
  • Assemblies that fail must be repaired or replaced within 30 days of notice of the failure (CCCPH 3.3.3(e)); a water system may allow extensions if its plan provides for them.

Sources: California rule; California rule; California rule

Common questions

Who requires backflow testing in Riverside and the Inland Empire?

Riverside Public Utilities does. Check the notice it sends for your due date.

How is the test report filed?

Online in most cases: at least one utility here uses Tokay. The tester files the report; ask them to send you a copy.

Backflow testing companies near Riverside

What the badges mean
✓ CA Utility-Approved Tester Verified On the city list
The company is on a water utility's own approved list (the second badge names the list). That is the utility's approval, not a state license, and it counts for that utility.
3 certified testers
How many certified testers the roster lists at this business.
★ 4.8 (25 reviews)
The Google rating, shown as Google reports it. It does not change the order.

Order is by our quality score, never by payment. How we verify listings.

✓ CA Utility-Approved Tester Verified ★ 5 (71 reviews) On Riverside Public Utilities listOn City of Redlands listOn Rancho California Water District list Backflow Testing

9840 Indiana Ave #6, Riverside, CA 92503 · 2 mi from Riverside

Verified Oct 2026 · Unclaimed listing
✓ CA Utility-Approved Tester Verified ★ 4.9 (146 reviews) On Riverside Public Utilities listOn EVMWD listOn Western Water listOn Rancho California Water District list Backflow Testing

6956 Indiana Ave #4, Riverside, CA 92506 · 2 mi from Riverside

Verified Oct 2026 · Unclaimed listing
✓ CA Utility-Approved Tester Verified ★ 4 (29 reviews) On Riverside Public Utilities listOn EVMWD listOn City of Redlands listOn Western Water list Backflow Testing

10910 Hole Ave, Riverside, CA 92505 · 4 mi from Riverside

Verified Oct 2026 · Unclaimed listing
✓ CA Utility-Approved Tester Verified ★ 4.9 (51 reviews) On Riverside Public Utilities list Backflow Testing

4193 Flat Rock Rd Ste 200, Office 258, Riverside, CA 92505 · 4 mi from Riverside

Verified Oct 2026 · Unclaimed listing
✓ CA Utility-Approved Tester Verified ★ 4.8 (170 reviews) On Riverside Public Utilities listOn Cucamonga Valley Water District listOn City of Redlands list Backflow Testing

4063 Brockton Ave, Riverside, CA 92501 · 5 mi from Riverside

Verified Oct 2026 · Unclaimed listing
✓ CA Utility-Approved Tester Verified ★ 5 (4 reviews) On Riverside Public Utilities listOn EVMWD list Backflow Testing

231 Alessandro Blvd # A, Riverside, CA 92508 · 5 mi from Riverside

Verified Oct 2026 · Unclaimed listing
✓ CA Utility-Approved Tester Verified On City of San Diego listOn Riverside Public Utilities listOn Cucamonga Valley Water District listOn Otay Water District listOn Sweetwater Authority listOn Olivenhain list Backflow Testing

5053 La Mart Dr Unit 203, Riverside, CA 92507 · 6 mi from Riverside

Verified Oct 2026 · Unclaimed listing
✓ CA Utility-Approved Tester Verified #AWWA #18786 ★ 5 (356 reviews) On IRWD listOn Riverside Public Utilities listOn EVMWD listOn Cucamonga Valley Water District listOn City of Redlands list Backflow Testing

791 Allen Dr, Corona, CA 92879 · 7 mi from Riverside

Verified Oct 2026 · Unclaimed listing
✓ CA Utility-Approved Tester Verified On Cucamonga Valley Water District listOn City of Redlands listOn Yorba Linda Water District listOn Rancho California Water District list Backflow Testing

2834 Hamner Ave #410, Norco, CA 92860 · 8 mi from Riverside

Verified Oct 2026 · Unclaimed listing
✓ CA Utility-Approved Tester Verified On Riverside Public Utilities listOn EVMWD listOn Rancho California Water District list Backflow Testing

21951 Winding Rd, Moreno Valley, CA 92557 · 8 mi from Riverside

Verified Oct 2026 · Unclaimed listing
✓ CA Utility-Approved Tester Verified On Rancho California Water District list Backflow Testing

14430 Laurel Dr, Riverside, CA 92503 · 2 mi from Riverside

Verified Oct 2026 · Unclaimed listing
✓ CA Utility-Approved Tester Verified ★ 4.1 (7 reviews) On Riverside Public Utilities listOn West Valley Water District list Backflow Testing

11626 Sterling Ave D, Riverside, CA 92503 · 4 mi from Riverside

Verified Oct 2026 · Unclaimed listing

All testers near Riverside

Find a tester Set reminder