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Find Radon gas testers in San-geronimo

Avatar for Restoration Pro's

Restoration Pro's

5.00(
2
)
•Approved Pro

Restoration Pro's

5.00(
2
)
•Approved Pro
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
3 years of experience

Restoration Pros specializes in residential water damage restoration and mold mitigation from bathroom leaks, mold in garage, bedroom and kitchen. We are owner operated, servicing the entire Bay Area. Our goal is dry your property quickly killing and removing any mold damage and get your property back to pre-loss condition so you can get back to doing what you do, uninterrupted. Our team of professionals always move promptly. When it comes to water leaks, more time equals more damage. For these reasons we always move swiftly to stop the damage from spreading.

"Tech did a great job Very thorough & hard working employee"

Elberta M on May 2025

Restoration Pros specializes in residential water damage restoration and mold mitigation from bathroom leaks, mold in garage, bedroom and kitchen. We are owner operated, servicing the entire Bay Area. Our goal is dry your property quickly killing and removing any mold damage and get your property back to pre-loss condition so you can get back to doing what you do, uninterrupted. Our team of professionals always move promptly. When it comes to water leaks, more time equals more damage. For these reasons we always move swiftly to stop the damage from spreading.

"Tech did a great job Very thorough & hard working employee"

Elberta M on May 2025

Welsh Demolition Inc.

1086 Beau Ave
No reviews yet

Welsh Demolition Inc.

1086 Beau Ave
No reviews yet
13 years of experience

Welsh Demolition Inc. is a full service demolition and asbestos removal contractor. We are a family owned business and have been in business since 2012.

Welsh Demolition Inc. is a full service demolition and asbestos removal contractor. We are a family owned business and have been in business since 2012.

SERVPRO of San Leandro

2065 Williams St
No reviews yet

SERVPRO of San Leandro

2065 Williams St
No reviews yet
58 years of experience

SERVPRO of San Leandro is a trusted leader in the restoration industry, and our highly trained technicians provide 24-hour emergency service. We’re dedicated to responding faster to any size disaster with the training, equipment, and experience to respond to your restoration or cleaning needs.

SERVPRO of San Leandro is a trusted leader in the restoration industry, and our highly trained technicians provide 24-hour emergency service. We’re dedicated to responding faster to any size disaster with the training, equipment, and experience to respond to your restoration or cleaning needs.

Evergreen Air Duct Cleaning San Bruno

111 San Bruno Ave W
No reviews yet

Evergreen Air Duct Cleaning San Bruno

111 San Bruno Ave W
No reviews yet
25 years of experience

Professional Air Duct & Dryer vent Cleaning & Repair Company in San Bruno.

Professional Air Duct & Dryer vent Cleaning & Repair Company in San Bruno.

Global Plasma Solutions

10 Mall Terrace
5.00(
1
)

Global Plasma Solutions

10 Mall Terrace
5.00(
1
)
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Global Plasma Solutions is a manufacturing company that sells air purification systems primarily into the commercial and residential markets. Home owners can benenfit from our systems as they are easily adapted to any HVAC system. Go to www.gpshvac.com to find a certified contractor near you to have one installed within your home.

Global Plasma Solutions is a manufacturing company that sells air purification systems primarily into the commercial and residential markets. Home owners can benenfit from our systems as they are easily adapted to any HVAC system. Go to www.gpshvac.com to find a certified contractor near you to have one installed within your home.

Evergreen Carpet Cleaning Dublin

11792 Dublin Blvd
No reviews yet

Evergreen Carpet Cleaning Dublin

11792 Dublin Blvd
No reviews yet
25 years of experience

Professional Air Duct & Dryer vent Cleaning & Repair Company in Dublin.

Professional Air Duct & Dryer vent Cleaning & Repair Company in Dublin.

Evergreen Carpet Cleaning San Ramon

1081 Market Pl
No reviews yet

Evergreen Carpet Cleaning San Ramon

1081 Market Pl
No reviews yet
25 years of experience

Professional Air Duct & Dryer vent Cleaning & Repair Company in San Ramon.

Professional Air Duct & Dryer vent Cleaning & Repair Company in San Ramon.

Mr. Fix It Roofing and Paving

771 Mission Ave
5.00(
3
)

Mr. Fix It Roofing and Paving

771 Mission Ave
5.00(
3
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

roofing paving of all types remodeling an renovation over 27 years experience good work at a good price

roofing paving of all types remodeling an renovation over 27 years experience good work at a good price

Evergreen Air Duct Cleaning Walnut Creek

1470 Central Rd
No reviews yet

Evergreen Air Duct Cleaning Walnut Creek

1470 Central Rd
No reviews yet
25 years of experience

Professional Air Duct & Dryer vent Cleaning & Repair Company in Walnut Creek.

Professional Air Duct & Dryer vent Cleaning & Repair Company in Walnut Creek.

Healthy Building Science

28 2nd St
5.00(
4
)

Healthy Building Science

28 2nd St
5.00(
4
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Sick buildings are contagious. Healthy Building Science works with clients to create healthier air quality, water quality, and electromagnetic environments for the home and office. Healthy Building Inspections also helps owners and design/build teams set clear goals for sustainability and navigate the complexities of building science and occupant health to create healthy, high performance buildings. Alex Stadtner, founder of Healthy Building Inspections, is the primary healthy building inspector and green building consultant. His certifications include: Building Biology Environmental Consultant, Certified Green Building Professional, Applied Microbial Remediation Technician, Healthy Homes Specialist, and LEED Accredited Professional.

Sick buildings are contagious. Healthy Building Science works with clients to create healthier air quality, water quality, and electromagnetic environments for the home and office. Healthy Building Inspections also helps owners and design/build teams set clear goals for sustainability and navigate the complexities of building science and occupant health to create healthy, high performance buildings. Alex Stadtner, founder of Healthy Building Inspections, is the primary healthy building inspector and green building consultant. His certifications include: Building Biology Environmental Consultant, Certified Green Building Professional, Applied Microbial Remediation Technician, Healthy Homes Specialist, and LEED Accredited Professional.

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FAQs for radon gas testing projects in San-geronimo, CA

Radon is the second leading cause of lung cancer in the U.S. The gas seeps through cracks in foundations and collects in basements and other low areas. Once you breathe it in, radioactive particles lodge in lung tissue and do long-term damage. Because you can’t see or smell radon, the EPA recommends testing your home every two years—and after major renovations—to keep your family safe.

Yes—every home should be tested. The EPA advises doing it at least every two years and any time you remodel, buy, or sell. On average, one in 15 houses nationwide sits above the recommended limit, and the only way to know where yours stands is a formal test. The equipment simply measures gas levels and won’t change your indoor environment, so the process is completely harmless.

Certified radon professionals—often home inspectors or dedicated radon mitigation contractors—handle testing. These radon testing professionals follow EPA protocols and use calibrated instruments to check levels throughout your house. Hiring a certified radon specialist means results you can trust for real estate deals, insurance requirements, and, most importantly, your family’s health.

Inspectors specialize in measuring radon gas levels, while licensed mitigation contractors design and install the systems that remove it. If your test comes back high, your inspector can point you to a qualified mitigation pro who will size and install the right fan, piping, or other equipment to bring levels down.

No—standard home air purifiers don’t touch radon. They’re built to trap dust and pollen, not radioactive gas. If testing shows high levels, you’ll need a dedicated mitigation system that vents the gas from beneath your home to the outdoors. Relying on a room purifier alone won’t keep your indoor air safe.

Opening a few windows in your home might dilute radon for a short time, but the gas seeps back in as soon as they’re closed. For a lasting fix, you’ll need a professional mitigation system—often a sub-slab depressurization fan—that pulls radon from beneath the foundation and safely vents it outside.

The San-geronimo, CA homeowners’ guide to radon gas testings

From average costs to expert advice, get all the answers you need to get your job done.

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