Well Water Testing in Napa, California

6 verified well water specialists serving Napa. Every listing shows the credentials we verified.

Informational only. This page helps you find certified professionals. It is not medical, legal, or structural safety advice. For any health or safety hazard, consult a certified/licensed expert. See our verification methodology.

Typical cost in Napa

$150–$600

Credentials to expect

EPA-Certified Lab, State Health Dept Certified, NELAP Accredited

Key fact

~43 million U.S. homes rely on private wells; the majority are under-tested.

Well Water specialists in Napa

6 listings

Hydros Agritech Inc

Napa, California

Featured
✓ CSLB A | C57 | D21

Hydros Agritech Inc provides professional home safety services in Napa, CA. The company holds CSLB A | C57 | D21 certification. Contact Hydros Agritech Inc for more information.

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Huckfeldt Well Drilling Inc

Napa, California

Pro
✓ CSLB C57

Huckfeldt Well Drilling Inc provides professional home safety services in Napa, CA. The company holds CSLB C57 certification. Contact Huckfeldt Well Drilling Inc for more information.

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West Coast Well And Pump

Napa, California

Pro
✓ CSLB C57

West Coast Well And Pump provides professional home safety services in Napa, CA. The company holds CSLB C57 certification. Contact West Coast Well And Pump for more information.

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Bess D Pump & Well Elect

Napa, California

Free
✓ CSLB C10 | C57

Bess D Pump & Well Elect provides professional home safety services in Napa, CA. The company holds CSLB C10 | C57 certification. Contact Bess D Pump & Well Elect for more information.

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Mc Lean & Williams Inc

Napa, California

Free
✓ CSLB C57

Mc Lean & Williams Inc provides professional home safety services in Napa, CA. The company holds CSLB C57 certification. Contact Mc Lean & Williams Inc for more information.

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Oakville Pump Service Inc

Napa, California

Free
✓ CSLB A | B | C10 | C16 | C36 | C57 | C60 | D21

Oakville Pump Service Inc provides professional home safety services in Napa, CA. The company holds CSLB A | B | C10 | C16 | C36 | C57 | C60 | D21 certification. Contact Oakville Pump Service Inc for more information.

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Well Water Testing in Napa — FAQ

How often should I test my well water?
The CDC recommends annual testing for bacteria, nitrates, and pH — and after any flooding or nearby land-use change.
What does a well water test cost?
A standard panel runs $150–$600 depending on the contaminants screened (bacteria, nitrates, arsenic, lead, VOCs).
Why use a certified lab?
Only EPA/state-certified or NELAP-accredited labs produce results accepted for real-estate transactions and regulatory purposes.

Other services in Napa

Foundation Repair

in Napa, California

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