BackflowNear Test-Due Reminder

Backflow testing companies in District of Columbia

From DC Water's list of companies approved to test backflow assemblies in its water system, read September 29, 2026. District of Columbia publishes no statewide tester list we can use, so we start with its largest utility lists.

9 companies on the utility list
5 listed here, phones checked on Google

The lists we use in District of Columbia

Being on a utility's list means that utility lets the company file backflow test reports in its system. It is not a state license. See District of Columbia backflow rules and how testers are certified.

Backflow testing businesses in District of Columbia

Ranked by our quality score: on the utility's current list, a phone that matches the business's Google profile, and a website. Nobody can pay to move up.

Towns with approved testing companies

Questions

Where do these District of Columbia backflow testing companies come from?

District of Columbia publishes no statewide list of backflow testers that we can use, so every business here is on the approved list of DC Water: companies allowed to file backflow test reports in that water system. We read the list on September 29, 2026 and checked each company's phone against its Google profile.

Who is allowed to test a backflow preventer in District of Columbia?

A tester certified as District of Columbia's rules require, and usually one your water utility accepts. Our District of Columbia rules guide links the state rule. Ask any company for the tester's certificate number before the test.

How often does a backflow assembly need testing?

Most water utilities require testable backflow assemblies to be tested at installation and then every year. Your utility's notice gives your deadline and how the report is filed.

Never miss your annual backflow test

Most water utilities require the backflow assembly on an irrigation, fire or commercial line to be tested every year, and a missed test can mean a shutoff notice. Tell us when yours was last tested and we'll text you a month before it is due, with certified local testers ready to book.

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