What Licensing Should Your Water Treatment Contractor Have?

Verifying proper credentials before hiring protects against poor installation quality and ensures appropriate system recommendations.

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Key Takeaways
  • Confirm a valid state plumbing contractor license for installation work.
  • WQA certification indicates specialized water treatment training beyond general plumbing.
  • Verify both credentials directly through official channels rather than a contractor’s own claim.
  • These credentials together provide assurance of both proper installation and appropriate system selection.

Plumbing Licensing

Whole-home filtration system installation typically involves plumbing work, requiring a valid state plumbing contractor license for proper, code-compliant installation.

Water Quality Association Certification

Water Quality Association (WQA) certification indicates specialized training in water treatment system selection and installation, a relevant credential beyond general plumbing licensing.

Editor’s Pick
ZeroWater 23-Cup Dispenser Ready-Pour 5-Stage Water Filter with 0 TDS Water Filter – IAPMO
ZeroWater 23-Cup Dispenser Ready-Pour 5-Stage Water Filter with 0 TDS Water Filter – IAPMO
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Longest Service Interval
CuZn UC-200 Under Sink Water Filter, NSF/ANSI 42 and 372
CuZn UC-200 Under Sink Water Filter, NSF/ANSI 42 and 372

A 5-year, 50,000-gallon cartridge life is the reason this one shows up on professionally installed jobs. Fewer service visits is most of the total cost of ownership on an installed system.

5-year filter lifeNSF/ANSI 42 and 37250,000 gal
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Verifying Credentials Directly

Verify plumbing license status through your state’s licensing board and WQA certification through the WQA’s own directory rather than relying solely on a contractor’s own claim.

PUR Plus Vertical Faucet Mount Water Filtration System, Lead-Reducing Filter, Great-Tastin
PUR Plus Vertical Faucet Mount Water Filtration System, Lead-Reducing Filter, Great-Tastin
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Tightest Pore Size
Waterdrop TSU 0.01 Micron Ultra Filtration Under Sink System
Waterdrop TSU 0.01 Micron Ultra Filtration Under Sink System

A 0.01-micron ultrafiltration membrane sits well below the particle sizes that dominate drinking-water microplastic studies, and unlike RO it keeps minerals and produces no wastewater. This is the spec to compare against when a contractor quotes you a system.

0.01 micron UFNo wastewaterKeeps minerals
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FAQ

Is a general plumber qualified to install a microplastics filtration system?
A licensed plumber can handle the installation work, but WQA certification indicates additional specialized training in system selection specifically relevant to water treatment goals.

Important

Verify credentials directly through official licensing boards and the WQA directory rather than relying on a contractor’s own claims.

These statements have not been evaluated by the Food and Drug Administration. This information is not intended to diagnose, treat, cure, or prevent any disease. Content is for informational purposes only and is not medical advice; consult a qualified healthcare provider before starting any supplement. As an Amazon Associate we earn from qualifying purchases.

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