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Q: How often should radon levels be tested to ensure safety?

• <div><p>Testing every 2-5 years or upon adjusting occupancy or structural changes maintains safe environments.</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>

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: 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 does radon mitigation take?

• <div><p>Installation typically takes 1-2 days, depending on the system and property layout.</p></div>

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

*The Angi rating for Radon Detection And Reduction companies in Sultana, 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 Sultana, 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 May 18, 2026

Reviewed in May 2026
Quick and thorough completion of installation of rain gutters and painting of fascia.
Lee's Roofing
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Reviewed in April 2026
I needed to replace the roofing from my home because it’s been 30 years. They came in and gave an estimate the next day. They worked with me on price and advised me on what shingles were better and prices. They arrived on time and finished pretty fast. They got the job done.
United Pro Roofing Co.
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Reviewed in May 2025
Great company. Very professional, helpful and goes above and beyond for their customers. Their customer service is unmatchable. All the employees there are kind, helpful and go out of their way for their clients. I would definitely recommend them to anyone looking to get their AC serviced or...
STARACE MECHANICAL HEATING & AIR
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Reviewed in August 2024
Would definitely contact Michael again. I Got a fast response. I had a time frame and needed removal done at a specific time and he exceeded my expectations! Reliable and trustworthy I highly recommend his services!
Garza Solutions
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Reviewed in January 2024
Tri country disposal was great. On time and great communication. Used them for a home demo project and will definitely use again.
Tri County Disposal
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Reviewed in December 2023
I have hired Angel's Tree Service for a number of tree trimming or removal over the years. They have always been timely in getting the job done. Their prices are fair, and they always leave the area neat and tidy. I appreciate their quality work, and I definitely would recommend this company.
Angels Tree Service Inc.
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Reviewed in December 2023
Great service and great results! Very professional and thorough roof repair. Would hire again.
Mountain View General Construction
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Reviewed in June 2023
Responded ASAP had an emergency! Tree fell over our shed and they removed it. Very safe and profesional
Mendoza Tree Service, Inc.
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Reviewed in June 2023
Great!! The work was done in a timely manner and finished as promised. I’ve used them on a full house roof and on a second property I had them replace a patio roof
Roofing Pros Inc
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Reviewed in April 2023
I had 5 palm trees in my front yard that I wanted to get rid of. They were able to remove the trees in one afternoon and dump all the trash the next day. The work was done well and they came back the next day for some finishing touches. My front yard looks more spacious and open now.
Mendoza Fencing License Not Yet Provided
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Find Radon detection and reduction specialists in Sultana

MG Remediation, Inc.

3.3(

)

Serving Sultana, CA and surrounding areas

Approved

In business since 1986

Free estimates

Customers say: Quick response

"Peter and his team at MG Remediation are professionals. They did everything they told me they would do and the radon levels dropped significantly. Great communication, too, which always matters."

Response time4 days

Recommended by80%of homeowners

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A.K.I.I.

New to Angi

Serving Sultana, CA and surrounding areas

In business since 2003

Free estimates

K.T.W. Land Development provides local area consumers with superior quality land development and construction services. With years of experience in the industry, you can be sure your project will be handled promptly and professionally. Call K.T.W. Land Development today to schedule an appointment for your project estimate!

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Radon Detection and Reduction questions, answered by experts

Testing every 2-5 years or upon adjusting occupancy or structural changes maintains safe environments.

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.

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.

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.

Installation typically takes 1-2 days, depending on the system and property layout.

The Sultana, 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.
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.
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.
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.