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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: Do radon mitigation systems come with warranties?

• <div><p>Yes, many systems include warranties for performance. Confirm terms with your installer.</p></div>

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

• <div><p>No level of radon is technically safe, but since it is present everywhere, complete avoidance is impossible. 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 preventative measures if your home's radon levels are between 2 and 4 pCi/L or higher.</p></div>

Q: Is a radon mitigation system expensive to run?

• <div><p>The fan that pulls the radon out of the air needs to run continuously, so you may see an increase in your electric bill once you install the mitigation system. Additionally, you may see an increase in your heating or cooling bills, as the fan can cause some loss of hot or cool air.</p></div>

Q: How much electricity does a radon mitigation system use?

• <div><p>The average radon mitigation system uses about 876 kWh of electricity per year, although the exact amount of electricity used will vary depending on the size of the radon fan. Once the system is installed, the annual increase to your energy bill could range from <b>$30 to $300 per year</b>, again depending on the size of the fan.</p></div>

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Verified Reviews for Radon Detection And Reduction pros in Norco, CA

*The Angi rating for Radon Detection And Reduction companies in Norco, 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 Norco, 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 December 18, 2025

Reviewed in December 2025
Security Fence and Gates did an excellent job on replacing my rod iron fences with a more contemporary design. All of the workers were very skilled and knowledgeable and did an excellent job in measuring what was a sloped area. I received many compliments on the fence. I appreciate the variety...
Security Iron Fence & Gates
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Reviewed in February 2025
Could not be more pleased. Showed up and did the preliminary work the first day contacted. They returned the next day and finished removing the tree, a approx.50-60 foot 50 year old ash tree, cleaned up all debris. Cleaned off the roof and yard. Absolutely the best. Jimmy, himself, is very...
JIMMYS TREE CARE INC
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Reviewed in January 2025
Removal and installation was great
EC Plumbing
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Reviewed in June 2023
They did a great job & were very knowledgeable about termite infestation & how to best take care of the problem. They were friendly and efficient.
Halo Home Services
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Reviewed in May 2023
Zetzer Cleaning Service went above and beyond to provide exceptional assistance to me as a new mother in dire need of help with household cleaning. Right from the booking process, their professionalism and commitment to excellence were evident. The Zetzer team arrived promptly and well-prepared,...
Zetzer Cleaning
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Reviewed in April 2023
They used a tree grinder to take away the trees after they cut them down. They removed 4 large palms in less than 90 mins and cleaned up everything. Super to work with.
Forest Tree Care Inc.
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Reviewed in January 2023
They arrived on time And removed removed 2 Palm Treesground the Stumps And cleaned up In a total of 6 hours
Silva Tree Service
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Reviewed in July 2022
Douglas McCoy Service: Pest Inspection and Remediation Corona Ca Superior Care Termite company provides a high quality of services supporting your pest control needs. They are very professional and knowledgeable about thr delivery of their product and services. In my experience with using...
Superior Care Termite Inc.
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Reviewed in February 2022
We would recommend this company to cut your tree. We originally hired a different company to thin out our very tall pine tree. Unfortunately, the cutter got sick before finishing the job (but he did a wonderful job of what he could) and suggested that we call another company to finish. We...
Parcero Tree Service
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Reviewed in January 2022
Carlos did an amazing job. He cut 3 very large trees down to the stump for me. I will have him remove the stumps when I replace the fence that they are rooted under. He came over right away and gave me a quote. Out of 5 quotes he was the lowest. He did high quality work for a price that fit my...
Carlos Tree Services
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Find Radon detection and reduction specialists in Norco

Pacific Environmental & Abatement Solutions Inc

4.6(

)

Radon Gas - AbatementRadon Gas - Testing

Serving Norco, 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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America’s Restoration Cabinet and Flooring Solutions

4.9(

)

Radon Gas - Testing

Serving Norco, CA and surrounding areas

Approved

Free estimates

Emergency services offered

Credit card accepted

"Excellent company very professional, skilled, and performed excellent job. I highly recommend to whomever wants to do remodeling. We also very pleased with the nice and professional manner of Mr. Ryan and Scotty."

+21

Response time1 day

26 neighbors recently requested a quote

Recommended by100%of homeowners

Radon Gas - AbatementRadon Gas - Testing

Serving Norco, CA and surrounding areas

In business since 1998

Free estimates

Emergency services offered

"not that great. basically paid $99 to get an estimate. included cleaning roof and minimal repairs. took a while to get appointment, and then when they came, they didn't even do the work! gave a really big estimate and then re-seheduled to have someone else do the work. they wouldn't totally replace the roof, gave different estimates to repair, I went with a different company to do a full roof rplacement."

Recommended by81%of homeowners

Serving Norco, CA and surrounding areas

In business since 2023

Free estimates

Emergency services offered

"The work went great. They were very fast and very professional. They did an excellent job on something we've needed done for years."

+31

Response time1 day

Response rate100%

3 neighbors recently requested a quote

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Home Restoration and Design

5.0(

)

Radon Gas - Abatement

Serving Norco, CA and surrounding areas

In business since 1995

Emergency services offered

Credit card accepted

We are open Monday thru Saturday 7am to 7 pm. We are here to serve you with professionalism and quality remodels, don't settle for less. Shop us first, we are licensed and insured and provide great customer service!

+14

Recommended by100%of homeowners

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Radon Detection and Reduction questions, answered by experts

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.

Yes, many systems include warranties for performance. Confirm terms with your installer.

No level of radon is technically safe, but since it is present everywhere, complete avoidance is impossible. 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 preventative measures if your home's radon levels are between 2 and 4 pCi/L or higher.

The fan that pulls the radon out of the air needs to run continuously, so you may see an increase in your electric bill once you install the mitigation system. Additionally, you may see an increase in your heating or cooling bills, as the fan can cause some loss of hot or cool air.

The average radon mitigation system uses about 876 kWh of electricity per year, although the exact amount of electricity used will vary depending on the size of the radon fan. Once the system is installed, the annual increase to your energy bill could range from $30 to $300 per year, again depending on the size of the fan.

The Norco, 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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•
Aug 3, 2026Aug 3, 2026
How Much Does a Radon Mitigation System Cost? [2026 Data]
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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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Jacqueline DeMarco
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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.