City of Dayton Water: backflow testing rules

How the report is filed

• Completed test reports are faxed to 937-333-8555 or emailed to Backflow@daytonohio.gov. Source.
• A complete report must include all identifying information for the device and for the plumber or tester; failed, illegible or incomplete reports are not accepted. Source.

Tester registration

• The tester records a state certification number, its expiration date and the test equipment calibration date on each report. Source.

If a test is missed

• Tampering with a device's identification plate will require the customer to replace the backflow device. Source.

Program

• City of Dayton Water Engineering, 320 W. Monument Ave., publishes the backflow preventer test report form and takes questions at 937-333-3743. Source.

How to file your backflow test with City of Dayton Water

1. Read your notice. It names the assembly, its location and the date the report is due.
2. Book a tester City of Dayton Water accepts. See finding a tester below; book early so there is time to repair a failed assembly.
3. The tester tests the assembly and fills in the test report. A failed assembly is repaired and tested again.
4. The report is filed. Completed test reports are faxed to 937-333-8555 or emailed to Backflow@daytonohio.gov.Source.
5. Keep a copy and set a reminder for next year. Set a free test-due reminder.

Finding a tester City of Dayton Water accepts

We found no tester list on City of Dayton Water's own pages. Use a state certified tester, and check your notice in case it names the testers or the portal it accepts.

Before you book, ask the tester:

• Are you registered with City of Dayton Water?
• Will you send the test report to the utility for me, and how?
• When is my report due? The date is on your notice; the tester needs time to test, repair if needed and file.

Other water utilities in Ohio

• Cleveland Water
• City of Columbus Division of Water
• Greater Cincinnati Water Works
• City of Canton Water Department
• City of Toledo Division of Water
• Del-Co Water Company

Read October 6, 2026. Program page: daytonohio.gov.

Backflow testers near Dayton

What the badges mean

✓ OH Certified Backflow Tester Verified

A state roster lists at least one certified tester at this business, with a current certificate. The state sets the exam and renewal.

✓ OH 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.

All testers near Dayton · Ohio roster