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Q: How is radon gas abatement professionally handled?

• <div><p>Abatement includes sealing entry points and venting with systems that reduce radon levels below recommended EPA limits. It is handled by certified professionals.</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 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: Why is radon detection important for residential properties?

• <div><p>Radon detection is crucial as prolonged exposure to radon gas, a leading cause of lung cancer, poses significant health risks in residential environments.</p></div>

Q: What steps should be taken if high radon levels are detected?

• <div><p>If high radon levels are detected, steps include sealing entry points, installing a mitigation system, and retesting the air regularly to ensure reduced levels.</p></div>

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

*The Angi rating for Radon Detection And Reduction companies in Mariposa, 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 Mariposa, 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 February 09, 2026

Reviewed in February 2026
I was very pleased with Mountain Ridge and the work they got done on our property. Not only is it a blessing to interact with Jeremaia, but he brings a good and positive attitude along with very hard work. I was pleasantly surprised at the amount of tree work/ brushing Mountain ridge was able to...
Mountain Ridge Landscaping
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Reviewed in March 2025
Josh and Trevor were great. They did the needed clean up, removing the downed wood, bushes, and weeds on my 2 acres that I just can't keep up with. They got them removed and burned. They did it fast and did an amazing job. The price was fair. I can't recommend them enough. They...
Wolford Excavating
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Reviewed in December 2024
Excellent! They listened to what I wanted and made it happen with detail and precision. I would definitely recommend Rough Terrain and will call them for future landscaping projects.
Rough Terrain Landscapes
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Reviewed in August 2024
They did an excellent job at a very fair price !! Work came out great and the roof is perfect and waterproof again all you can ask for I would definitely recommend them and hire them again if I needed any more work
Green Leaf Roofing
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Reviewed in July 2024
yes done well and informative
TOWB HANDYMAN SERVICES LLC
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Reviewed in May 2024
Logan is so easy to work with. He knows his business really well, and I trust his insight and estimates. He got the job done in plenty of time, was able to dispose of our removed tree stumps so I didn't have to deal with them, and still had time to move some boulders around and place them...
Christian Dozer & Trucking inc
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Reviewed in October 2023
Michael is very professional and showed up on time. We had him take care of some hazardous trees and we asked him to cut everything into manageable sizes for us to be able to split ourselves. He does great work and we will be using his services again in the future. I highly recommend Axcess Tree...
Axcess Tree Services
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Reviewed in May 2022
Wendell was very thorough in his process, and made every effort to accomplish a quality repair. I would highly recommend him!
Webb Roofing
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Reviewed in September 2021
I had 4 very large down trees, already de limbed, came as scheduled finish ahead of time and he and the cleaned everything up. Very pleased and highly recommend
Becks Tree and Property Service
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Find Radon detection and reduction specialists in Mariposa

A.K.I.I.

New to Angi

Serving Mariposa, CA and surrounding areas

In business since 2003

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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

Abatement includes sealing entry points and venting with systems that reduce radon levels below recommended EPA limits. It is handled by certified professionals.

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.

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.

Radon detection is crucial as prolonged exposure to radon gas, a leading cause of lung cancer, poses significant health risks in residential environments.

If high radon levels are detected, steps include sealing entry points, installing a mitigation system, and retesting the air regularly to ensure reduced levels.

The Mariposa, 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.
Kate Fann
•
Apr 9, 2026Apr 9, 2026
Radon Mitigation System Diagram: Understanding How It Works
You need to protect your home from radon, but what does a radon mitigation system look like? Check out this radon mitigation system diagram to learn how it works.
Kyle Schurman
•
Apr 8, 2026Apr 8, 2026
How Long Does a Radon Mitigation System Last?
How long does a radon mitigation system last? A properly installed and maintained system can last 20 years or more, but various issues can reduce the life span.
Angi
•
May 21, 2026May 21, 2026
How to Hire a Radon Mitigation Service
Need to find a qualified radon mitigation service? Learn how to hire the right pro, from certifications to questions to ask, to protect your home.