Well Water Testing in Modesto, California

3 verified well water specialists serving Modesto. 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 Modesto

$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 Modesto

3 listings

We're still building out our Modesto directory. These are the 3 verified well water specialists we've confirmed so far — see more across California.

Masellis Drilling Inc

Modesto, California

Pro
✓ CSLB C57

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

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Hennings Bros Drilling Co Inc

Modesto, California

Free
✓ CSLB C57

Hennings Bros Drilling Co Inc provides professional home safety services in Modesto, CA. The company holds CSLB C57 certification. Contact Hennings Bros Drilling Co Inc for more information.

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Howk Systems

Modesto, California

Free
✓ CSLB A | C57 | D21

Howk Systems provides professional home safety services in Modesto, CA. The company holds CSLB A | C57 | D21 certification. Contact Howk Systems for more information.

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Well Water Testing in Modesto — 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.

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