Johnson Plumbing LLC, Columbia, MO: Backflow Testing

Certification

✓ On Missouri's certified backflow tester roster Phone matches its Google profile

Certified tester	Certificate	Expires
Bill Johnson	34-10852	January 2029

From the Missouri Department of Natural Resources roster, read October 6, 2026. The roster lists people, not companies; these are the certified testers it lists for this business. Ask which tester will do your test, and your utility may also require the tester to be registered with it.

Call (573) 474-1015 More testers in Missouri

Where you will find Johnson Plumbing LLC

These are the city pages close enough for this business to appear on.

Columbia, MO(3 mi)
Jefferson City, MO(30 mi)

Other backflow testers nearby

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Pristine Lawn Services LLC	Backflow Testing	2 mi
Questec Mechanical	Backflow Testing	2 mi
Tallmage Plumbing LLC	Backflow Testing	3 mi
Brian Wear	Backflow Testing	3 mi
Quality Cut Lawn Care	Backflow Testing	3 mi
Atkins Inc.	Backflow Testing	4 mi

Questions about Johnson Plumbing LLC

Is Johnson Plumbing LLC licensed?

Yes. Missouri records showed an active certificate (#34-10852) when we last checked in Oct 2026. Ask to see it before work starts, since a certificate can lapse between checks.

What does Johnson Plumbing LLC do?

Their listing covers backflow testing. Call to confirm the service you need, because offerings change.

What areas does Johnson Plumbing LLC serve?

They are based in Columbia, Missouri, within driving distance of Columbia, Jefferson City. Service areas are set by the business, so confirm yours when you call.

How do I reach Johnson Plumbing LLC?

Call (573) 474-1015.

Is this your business?

Claim this listing free: add the utilities you file with, your service area and your residential test price, and get annual test-due requests from property owners.

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