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Corte Madera backflow testing

32 companies on Marin Water's tester list · 65 testers in total · list version Revised Oct. 23, 2026

About this list

Utility
Marin Water
List title
“List of Certified Backflow Testers” (as printed)
Version
Revised Oct. 23, 2026
List date
2026-10-23
Fetched
2026-11-04 (UTC)
Format
HTML table
Testers
65 testers on the list. 1 tester on this list has no company named. We count them but do not list individuals. 3 more entries on the list belong to companies named after a person; we do not republish those here, so check the utility's own list. Listed there? You can ask us to add your company.
Gaps
Our copy of Marin Water's list (version Revised Oct. 23, 2026), fetched 2026-11-04, has no town or ZIP code for 28 of the 32 companies; no phone for 20 of the 32 companies (the list prints none for them, or prints a number only one tester of the company gives, or one labelled as a mobile, which we do not republish). Those cards leave the field out.
The utility says
“The testers on this list have demonstrated their ability to field test Backflow Prevention Assemblies to the satisfaction of the District. Marin Water assumes no liability for the abilities, performance or quality of work performed by individuals listed.”

On Marin Water's approved list, version Revised Oct. 23, 2026 · fetched 2026-11-04

Every company below is on this list; each card says “On this utility's approved list”. The list is the utility’s, not ours: we copy company names, addresses and phone numbers from it, sort them A to Z and do not rank or endorse anyone. Confirm with your utility before booking.

On the list as ofRevised Oct. 23, 2026

List of Certified Backflow Testers. Fetched 2026-11-04 (UTC).

Open the utility’s own list
The utility’s backflow program page
How we handle listings (correct or remove a listing)

Confirm with your utility before booking.

Companies on the list (32)

Alphabetical. Tester counts are the number of testers the list names for each company.

415 Testing

On this utility's approved list

1 tester on this list

Backflow Team, LLC

P O Box 1240, Pleasanton, CA 94566888-230-2747

On this utility's approved list

2 testers on this list

From its website (2026-11-15): also backflow repair, backflow installation; area: all your backflow prevention service needs in the Bay Area, Central Valley, and beyond.

Checkrite Backflow Service, Inc

707-575-5296

On this utility's approved list

4 testers on this list

From its website (2026-11-15): also backflow repair, backflow installation, cross-connection surveys; area: Serving the SF Northbay: Sausalito, San Rafael, Marin County, Novato, Petaluma, Sonoma, Napa, Rohnert Park, Santa Rosa, Sebastopol, Healdsburg, Ukiah, Cloverdale.

Matrix HG

115 Mason Cir., Concord, CA 94520925-459-9200

On this utility's approved list

3 testers on this list

The Backflow Pro, Inc.

360 Grand Avenue #153, Oakland, CA 946101-800-511-2210

On this utility's approved list

3 testers on this list

From its website (2026-11-15): also backflow repair, backflow installation, cross-connection surveys; area: Services the entire San Francisco Bay Area..

Other utility lists in California: Beaumont, Escondido, Irvine, Modesto, Oakland, Oakley, Riverside, Sacramento.

Guides: How much does a backflow test cost? Tester prices, plus what your utility adds, Failed backflow test: what failed, your repair deadline, and when to replace the device, What is a backflow test? What the tester measures, what passes, and what you have to do, Irrigation backflow testing: which device your sprinkler system needs, when it is tested, and how to winterize it.