Top-rated radon detection and reduction specialists.

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Q: What level of radon is considered safe or dangerous?

• <div><p>No level of radon is technically safe, but since it is naturally present everywhere, it is impossible to avoid entirely. The average radon level in homes across the United States is 1.3 picocuries per liter (pCi/L). The Environmental Protection Agency (EPA) recommends taking action to reduce radon levels if your home's test results are between 2 and 4 pCi/L or higher.</p></div>

Q: How do I test for radon gas?

• <div><p>Use a radon test kit or hire professionals to conduct a detailed assessment of radon levels in your home.</p></div>

Q: What would cause radon in a house?

• <div><p>The natural breakdown of uranium in soil, rock, and water can cause radon to appear in a home. The gas seeps into homes through cracks in foundations, walls, or floors, as well as through gaps around pipes or construction joints. Radon levels are influenced by soil composition, building materials, and ventilation. Poorly sealed or airtight homes can trap radon, allowing it to accumulate.</p></div>

Q: What if radon is still high after mitigation?

• <div><p>You'll need to test your home for radon after installing the mitigation system, then again every two years. If radon remains elevated, contact a licensed radon professional, either the contractor who installed the system or a different one, and have them evaluate the system. They may need to make some changes to improve its effectiveness and performance.</p></div>

Q: How long can you go without a radon fan?

• <div><p>Your radon fan needs to operate 24/7 to be effective. The only time the fan isn't operating is during its replacement. Radon levels in the home can increase within hours if the fan stops working or something obstructs the stack vent. Fortunately, radon systems require no downtime maintenance between fan changes.</p></div>

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

*The Angi rating for Radon Detection And Reduction companies in San Diego, 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 Diego, 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 January 26, 2026

Reviewed in January 2026
GDFence was fast, efficient, did exactly what I wanted and cleaned up perfectly .
GD Fence
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Reviewed in August 2025
10/10 recommend California plumbing. They were on time and installed a new leak detection system for me. Overall great experience!
California Plumbing SD Inc
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Reviewed in May 2025
The Rodriguez tree services did great job to trimmed my two queen palm tree, they show up on time, they clear tree area. The tree service is very professional. I will use this company again next time.
RODRIGUEZ TREE SERVICES
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Reviewed in January 2025
Mr. Zan washed my roof and removed the algae and mildew from it. He also applied a post-treatment to my roof. Great job!
Sunrise Power Wash Co. - Unlicensed Contractor
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Reviewed in April 2023
We were in need of a total roof protection system for our home, and contacted Genesis Home Improvements for their services. Their team provided us with a variety of options and helped us choose the best one for our needs. The installation was completed in a timely manner and we are extremely...
Genesis Home Improvements
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Reviewed in January 2023
They are very knowledgeable, experienced and affordable pest inspection and control company. They got my pest issues solved in no time. Thank you to Alex and his team!
ADA Termite and Pest Control
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Reviewed in September 2022
Isac Rojas was punctual, polite and thorough. He replaced our kitchen disposal and cleared a clogged kitchen sink. Price was reasonable and I would use him again. Highly recommended.
Rojas plumbing & Drains
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Reviewed in March 2022
They did an amazing job removing our palm tree that the palm weevils had killed. Was a very large tree and they did an excellent job they hauled everything away and clean up was very nice. They ground down the stump and it looks great. They were punctual and very friendly while they were here.
GreenStone LandCare, Inc.
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Reviewed in January 2018
A pinhole leak developed overnight in a copper fitting in the wall behind an upstairs bathroom. The water damaged the walls and soaked the carpeting in an adjacent closet and to the ceiling of the room below before we caught it. I contacted Black Mountain Plumbing the following morning to have...
Black Mountain Plumbing Inc
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Reviewed in November 2017
They were professional, polite and very competent. I am inquisitive and knowledgeable in many many disciplines and can detect scams, deception and incompetence quickly and all my questions were answered politely and competently. The work was performed expeditiously at a fair price. If questions...
Blue Planet Drains & Plumbing, Inc.
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Find Radon detection and reduction specialists in San Diego

Pacific Environmental & Abatement Solutions Inc

4.6(

)

Radon Gas - AbatementRadon Gas - Testing

Serving San Diego, CA and surrounding areas

Approved

In business since 2006

Free estimates

Emergency services offered

"The tester was well versed in this area even showing the areas that were high in moisture. Very friendly and informative as well as professional. Made me comfortable with the experience she had. When the owner and maintenance worker failed she made me comfortable. Fae who had the credentials as well experience explained everything in detail. Definitely use Fae!!!"

1 neighbors recently requested a quote

Recommended by87%of homeowners

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San Diego Abatement Services

4.5(

)

Radon Gas - AbatementRadon Gas - Testing

Serving San Diego, 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 rate100%

2 neighbors recently requested a quote

Serving San Diego, CA and surrounding areas

In business since 2015

Emergency services offered

Credit card accepted

"Everything worked out very well. Very courteous. Explained everything thoroughly and the work they do is fantastic."

Recommended by100%of homeowners

Serving San Diego, 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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Radon Detection and Reduction questions, answered by experts

No level of radon is technically safe, but since it is naturally present everywhere, it is impossible to avoid entirely. The average radon level in homes across the United States is 1.3 picocuries per liter (pCi/L). The Environmental Protection Agency (EPA) recommends taking action to reduce radon levels if your home's test results are between 2 and 4 pCi/L or higher.

Use a radon test kit or hire professionals to conduct a detailed assessment of radon levels in your home.

The natural breakdown of uranium in soil, rock, and water can cause radon to appear in a home. The gas seeps into homes through cracks in foundations, walls, or floors, as well as through gaps around pipes or construction joints. Radon levels are influenced by soil composition, building materials, and ventilation. Poorly sealed or airtight homes can trap radon, allowing it to accumulate.

You'll need to test your home for radon after installing the mitigation system, then again every two years. If radon remains elevated, contact a licensed radon professional, either the contractor who installed the system or a different one, and have them evaluate the system. They may need to make some changes to improve its effectiveness and performance.

Your radon fan needs to operate 24/7 to be effective. The only time the fan isn't operating is during its replacement. Radon levels in the home can increase within hours if the fan stops working or something obstructs the stack vent. Fortunately, radon systems require no downtime maintenance between fan changes.

The San Diego, 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

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Sep 28, 2026Sep 28, 2026
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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.
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Jul 9, 2026Jul 9, 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.
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Jul 9, 2026Jul 9, 2026
What Is Radon and How Does It Get In Your Home?
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Jul 9, 2026Jul 9, 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.