Top-rated radon detection and reduction specialists.

Get matched with top radon detection and reduction specialists in San Marcos, CA

Q: How often should you replace a radon fan?

• <div><p>Many radon fans carry a five-year manufacturer's warranty. That said, your radon fan should last between five and ten years. Regular inspections will ensure the fan is operating properly. Unusual or exceptional noise coming from the fan or indications on your manometer or system monitor can immediately tell you that something is amiss.</p></div>

Q: What are the benefits of radon mitigation?

• <div><p>Mitigation reduces radon levels, protecting your health and complying with safety standards.</p></div>

Q: What is the biggest source of radon?

• <div><p>The soil beneath your house is most likely what&rsquo;s causing an increased level of radon. This is because soil holds radioactivity for a long time and it&rsquo;s also what most buildings are built on. Another common source of radon is water from a source that hasn&rsquo;t been through periodic radon tests, such as well water. Over time, the radon from the soil can inhabit other parts of your house like the foundation or plumbing.</p></div>

Q: What are the risks of radon?

• <div><p>Radon is the number one non-smoking cause of lung cancer in the United States, but it can cause some other concerning side effects in the meantime. If you have a raspy voice, chest pains, trouble breathing, difficulty swallowing, or any of the above, don&rsquo;t hesitate to perform radon testing and install a mitigation system as soon as possible.</p></div>

Q: How does radon enter my home?

• <div><p>Radon enters your home when warm air begins to rise and exits through the roof, creating a vacuum that pulls cooler air from under the foundation. Part of that air is radon, which is an invisible, odorless gas that develops naturally when radioactive particles are deep within the ground. Those particles usually come from decaying matter in soil and rocks.</p></div>

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Verified Reviews for Radon Detection And Reduction pros in San Marcos, CA

*The Angi rating for Radon Detection And Reduction companies in San Marcos, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Radon Detection And Reduction needs.

*The HomeAdvisor rating for Radon Detection And Reduction companies in San Marcos, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Radon Detection And Reduction needs.

Last update on October 09, 2025

Reviewed in October 2025
Mr. Leon (Jesus) assessed my property for stump removal and within minutes he stated working like a machine. I'm very pleased with the results and especially the price. He was more than reasonable and even gave a senior citizen discount! I do highly recommend him and the Leon Tree Service. ...
Leon Tree Service
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Reviewed in September 2025
Full Circle Tree Service did a professional and thorough job removing dead oaks from my property. I have used them before and they have always done excellent work
Full Circle Tree Service
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Reviewed in April 2025
Curbside Softwash did an awesome job. Our roof had algae and moss which is now completely gone. They took the time to do it right and made sure the cleanup - spraying down the outside walls, windows, and surrounding areas around the house. Was totally surprised at the before and after pics...
Curbside Softwash
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Reviewed in February 2023
They did an awsome job on the removal and trimming of the trees and made sure everything was cleaned up nice before they left. It was nice to see the owners of the company on sight to make sure everything was done right.
Five Star Tree Care
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Reviewed in December 2022
Maynor has maintained my property for many years. Over that time, he has installed, maintained and repaired my irrigation systems, installed hardscaping, installed and maintained landscaping, maintained a number of pines, eucalyptus, acacia, jacaranda and bougainvillea. On occasion he has...
Glendi's House Keeping Services-Unlicensed Contractor
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Reviewed in November 2022
They were excellent, this is my 2nd experience with them they detect where the leak is and they were very good they will use high technologies to detect the leak underground so you don't need to dig or something.
Cable Pipe & Leak Detection Inc
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Reviewed in April 2022
Received a bid quickly to take down a queen palm and trim some tall Italian cypress. We scheduled the work for the next week. The crew showed up right on time and the work was done quickly and proficiently. Good guys, I’d definitely recommend the for tree trimming and removal work.
Five Star Tree Care, Inc.
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Reviewed in February 2022
Christian and his crew did a fantastic job removing 3 very large and overgrown queen palms. Tricky removal as all were surrounded by concrete and one right next to the pool. They did it quickly and without damaging anything. I'd highly recommend them for any of the services that they perform.
Don Williams Landscape and Tree Service
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Reviewed in October 2021
Worked safely and effectively to clear away dead and/or extraneous branches from my trees.
North and South Landscaping and Tree Care, Inc.
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Reviewed in July 2021
7.21.2021. From the first contact Raynor staff showed care and knowledge of our needs without having to come and give us a physical quote saving so much time! They called on the day of service and updated the time of arrival. David arrived, inspected the broken door, and made suggestions that...
Raynor Door Authority of Las Vegas, LLC
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Find Radon detection and reduction specialists in San Marcos

San Diego Abatement Services

4.5(

)

Serving San Marcos, CA and surrounding areas

Approved

In business since 1985

Emergency services offered

Warranties offered

"Professional, prompt, courteous, completed in one day. Responsive to emails and all questions. Left no mess."

Response time2 days

Response rate98%

1 neighbors recently requested a quote

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Pacific Environmental & Abatement Solutions Inc

4.6(

)

Serving San Marcos, CA and surrounding areas

Approved

In business since 2006

Free estimates

Emergency services offered

"
Original estimate, management and office staff, arrival and completion time, care of customer's property, clean-up and price were all excellent.

"

2 neighbors recently requested a quote

Recommended by100%of homeowners

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Palomar Restoration Services Inc

5.0(

)

Serving San Marcos, CA and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

We offer our amazing services in the vibrant areas of San Marcos, Escondido, Oceanside & San Diego! We are Mold and flood experts. Licensed and insured. We work with all major insurance companies and provide 24 hour Emergency Service. We prioritize professionalism and customer satisfaction, making us the trusted choice for restoration solutions!

5 neighbors recently requested a quote

Serving San Marcos, CA and surrounding areas

In business since 2015

Emergency services offered

Credit card accepted

"They were super fast, efficient and vey thorough. They did a great job. We were very happy with the service. They were also very professional."

Recommended by100%of homeowners

Serving San Marcos, CA and surrounding areas

In business since 2004

Free estimates

"Krugh did an incredible job for us! They fit us into a busy week. They were polite, on time, clean, and quick! . The owners David and Denise are very kind and professionals. Highly recommend their business."

Recommended by96%of homeowners

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Entech Environmental Group

New to Angi

Serving San Marcos, CA and surrounding areas

In business since 2019

Free estimates

Offers commercial services

26 years of experience

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Radon Detection and Reduction questions, answered by experts

Many radon fans carry a five-year manufacturer's warranty. That said, your radon fan should last between five and ten years. Regular inspections will ensure the fan is operating properly. Unusual or exceptional noise coming from the fan or indications on your manometer or system monitor can immediately tell you that something is amiss.

Mitigation reduces radon levels, protecting your health and complying with safety standards.

The soil beneath your house is most likely what’s causing an increased level of radon. This is because soil holds radioactivity for a long time and it’s also what most buildings are built on. Another common source of radon is water from a source that hasn’t been through periodic radon tests, such as well water. Over time, the radon from the soil can inhabit other parts of your house like the foundation or plumbing.

Radon is the number one non-smoking cause of lung cancer in the United States, but it can cause some other concerning side effects in the meantime. If you have a raspy voice, chest pains, trouble breathing, difficulty swallowing, or any of the above, don’t hesitate to perform radon testing and install a mitigation system as soon as possible.

Radon enters your home when warm air begins to rise and exits through the roof, creating a vacuum that pulls cooler air from under the foundation. Part of that air is radon, which is an invisible, odorless gas that develops naturally when radioactive particles are deep within the ground. Those particles usually come from decaying matter in soil and rocks.

The San Marcos, CA homeowners’ guide to radon detection and reduction services

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

See all articles

Mitchell Grant
•
Mar 18, 2026Mar 18, 2026
How Much Does a Radon Mitigation System Cost? [2026 Data]
The cost of a radon mitigation system depends mostly on the type of system being installed. Use this guide to learn about your options.
Angi
•
Mar 18, 2026Mar 18, 2026
How Much Does Radon Testing Cost? [2026 Data]
Find out what impacts radon testing costs, including average prices for DIY kits and professional services, so you can protect your home and budget confidently.
Alison Kasch
•
Apr 6, 2026Apr 6, 2026
How Much Does Radon Remediation Cost? [2026 Data]
Get clear answers on how much radon remediation costs, including average prices, key cost factors, and tips to save money on your home’s radon mitigation.
Amy Freeman
•
Apr 5, 2026Apr 5, 2026
Who Installs Radon Mitigation Systems?
Radon is a gas that you can't see or smell and is harmful to your health. If your home has radon, you need to know who installs radon mitigation systems.
Jacqueline DeMarco
•
May 2, 2026May 2, 2026
What Is Radon and How Does It Get In Your Home?
What is radon gas? Find out what this radioactive gas is, why it is dangerous, how it gets in your home, and how to mitigate it.
Jacqueline DeMarco
•
Apr 10, 2026Apr 10, 2026
What Is Radon Testing?
What is radon testing? Radon testing measures the presence and concentration of radon gas within indoor environments. Read on to learn more.

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Radon Gas Testing

Radon Gas Abatement

Indoor Air Quality Testing

Verified Reviews for Radon Detection And Reduction pros in San Marcos, CA

Find Radon detection and reduction specialists in San Marcos

The San Marcos, CA homeowners’ guide to radon detection and reduction services

How Much Does a Radon Mitigation System Cost? [2026 Data]

How Much Does Radon Testing Cost? [2026 Data]

How Much Does Radon Remediation Cost? [2026 Data]

Who Installs Radon Mitigation Systems?

What Is Radon and How Does It Get In Your Home?

What Is Radon Testing?

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Get matched with top radon detection and reduction specialists in San Marcos, CA

Enter your zip and get matched with up to 5 pros

Need a pro for your radon detection and reduction project in San Marcos, CA?

Radon Gas Testing

Radon Gas Abatement

Indoor Air Quality Testing

Verified Reviews for Radon Detection And Reduction pros in San Marcos, CA

Find Radon detection and reduction specialists in San Marcos

The San Marcos, CA homeowners’ guide to radon detection and reduction services

How Much Does a Radon Mitigation System Cost? [2026 Data]

How Much Does Radon Testing Cost? [2026 Data]

How Much Does Radon Remediation Cost? [2026 Data]

Who Installs Radon Mitigation Systems?

What Is Radon and How Does It Get In Your Home?

What Is Radon Testing?

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