Top-rated radon detection and reduction specialists.

Best radon detection and reduction specialists near Port Townsend, WA

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 does the radon abatement process usually take?

• <div><p>Mitigation can take several days depending on home setup, equipment accessibility, and achieving effective diffusion system sealed efficiency.</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>

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Verified Reviews for Radon Detection And Reduction pros in Port Townsend, WA

*The Angi rating for Radon Detection And Reduction companies in Port Townsend, WA 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 Port Townsend, WA 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 March 08, 2026

Reviewed in March 2026
They cleaned the HVAC system. Very thorough and left everything very clean. Very responsive and flexible. Highly recommend them.
Rainier Roots Contracting LLC
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Reviewed in November 2025
Caleb and his team were fantastic removing limbs from several elders that had grown over my roof. He was prompt in coming over to give a quote. And he was able to schedule the work in a reasonable amount of time. And after they completed the work he showed me what was done and asked if I had any...
ELITE TREE CARE
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Reviewed in April 2025
Brian of 4X4 Roofing is a person of integrity and honesty. He gave us an estimate for removing and replacing out asphalt roof. He kept us informed of cost and replacement materials. He only charged us for materials used and credited us for unused material. He was onsite 95% of the time. He...
4x4 X-Terior Roofing, LLC
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Reviewed in January 2025
I highly recommend 101 Roof Cleaning. Mathew came on time, listened to and accomplished all work in the manner I had requested: sagging gutters reinforced, and cleared of debris, downspouts repaired and cleaned out, roof cleared and treated for moss, raccoon droppings taken off the roof in...
101 ROOF CLEANING
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Reviewed in October 2024
I have had raindrop gardens over to prune my fruit trees every season and take care of and trim my cedars and Douglas fir.. Always very happy with the results and find Dakota enjoyable and easy to work with!
RAIN DROP GARDENS
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Reviewed in April 2024
Ryan of All Peaks Roofing & Construction (APR) and his crew were friendly, helpful, and kept me informed about what they were doing and why. They were competent and efficient throughout the whole process and left things tidy at the end of each day. Once the roofing job was completed, they...
All Peaks Roofing and Construction
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Reviewed in February 2024
Gene was fast and reasonable and the cleanup was great
NWFW-TREE SERVICE
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Reviewed in July 2023
We had a large messy Holly tree removed and our experience was great. John responded quickly and his crew did a good job and left the area neat and tidy. I recommend them.
Hanselman Enterprises
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Reviewed in April 2023
Gene was very knowledgeable and helpful. The job was done quickly and cleanup was great
NWFW - Tree Service
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Reviewed in February 2023
Showing up on time and carefully explaining the process of the work involved over two days, Josh Armstrong and his crew removed two huge Douglas Fir trees from our back yard in a difficult position, both trees had to be taken down branch by branch and winched down in very close quarters to our...
Olympic Coast Construction, LLC
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Top-Rated Radon detection and reduction specialists in Port Townsend - Updated Nov 2026

Serving Port Townsend, WA and surrounding areas

Approved

In business since 2019

Free estimates

Small jobs welcome

"I am very pleased with service from 5 Microns. They were quick to communicate, showed up on time, very professional and promptly shared the test results."

+32

Response time3 hrs

Response rate98%

Recommended by100%of homeowners

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Environmental Technology Consultants

4.9(

)

Radon Gas - Testing

Serving Port Townsend, WA and surrounding areas

In business since 1997

Free estimates

"They were very honest & told us we didn't have black mold and needed a dehumidifier. I would very certainly recommend them for their honesty"

Recommended by100%of homeowners

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Werner Consultant America, LLC

New to Angi

Radon Gas - Testing

Serving Port Townsend, WA and surrounding areas

In business since 2003

Free estimates

Credit card accepted

Werner Consultant America, LLC will if possible evaluate and fix any environmental/hygienic problem including for example mold and toxicity problems in your home.

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Palm Construction and Remodeling Inc.

4.2(

)

Radon Gas - AbatementRadon Gas - Testing

Serving Port Townsend, WA and surrounding areas

In business since 2020

Free estimates

Offers commercial services

"Palm Construction recently replaced roof on my house and it was a great experience to work with Lee and his well organized team from Palm Construction. They did excellent job and my roof passed inspection with no issues. The quality of work and materials is excellent and my new roof looks fantastic. Also my whole house looks mush better now. Thanks!"

Response time2 days

Recommended by90%of homeowners

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SWAT Environmental, Inc.

1.8(

)

Radon Gas - Abatement

Serving Port Townsend, WA and surrounding areas

In business since 1988

Free estimates

Credit card accepted

SWAT Environmental is the nation's largest radon abatement engineer. Our experienced staff has corrected radon problems for over 60,000 customers since 1988 with 100% success!

Recommended by50%of homeowners

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Radon Detection and Reduction FAQs, answered by experts

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.

Mitigation can take several days depending on home setup, equipment accessibility, and achieving effective diffusion system sealed efficiency.

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 Port Townsend, WA 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
How Much Does a Radon Mitigation System Cost? [2026 Data]
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How Much Does Radon Remediation Cost? [2026 Data]
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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.
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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?
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.
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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.