BackflowNear Test-Due Reminder

Backflow testing companies in Maine

From the approved tester lists of Portland Water District and Old Town Water District, newest read March 4, 2026. Maine publishes no statewide tester list we can use, so we start with its largest utility lists.

46 companies on the utility list
24 listed here, phones checked on Google

The lists we use in Maine

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 Maine backflow rules.

Backflow testing businesses in Maine

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.

What the badges mean
✓ ME 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.

Towns with approved testing companies

All 24 backflow testing businesses in Maine, by town

Auburn: Eastern Fire Services, Inc, Nason Mechanical Systems

Bangor: Eastern Fire Protection, Harley Plumbing, Maine Fire Protection Systems

Biddeford: Jim Godbout Plumbing & Heating Inc.

Brewer: GW Flagg, Nichols Plumbing

Farmingdale: Beale's Plumbing

Gorham: Thirsty-Turf Irrigation, Inc

Gray: Dean & Allyn

Hope: Brookside Plumbing

Limington: H20 Irrigation

Mechanic Falls: Superior Energy Solutions

Minot: Advanced Fire Protection Services

Poland: High Tech Fire Protection Co.

Portland: Mechanical Services, Richard P. Waltz Plumbing & Heating, Rudi The Plumber Inc.

Scarborough: Caiazzo and Sons Plumbing, Inc., Chamberlain Plumbing, Johnson and Jordan

Wells: B.E. Noble Plumbing & Heating

Westbrook: Johnson Controls

Every listed backflow testing company, A to Z

Questions

Where do these Maine backflow testing companies come from?

Maine publishes no statewide list of backflow testers that we can use, so every business here is on the approved list of Portland Water District and Old Town Water District: companies allowed to file backflow test reports in that water system. We read the list on March 4, 2026 and checked each company's phone against its Google profile.

Who is allowed to test a backflow preventer in Maine?

A tester certified as Maine's rules require, and usually one your water utility accepts. Our Maine 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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