Top-rated radon detection and reduction specialists.

Get matched with top radon detection and reduction specialists in Startup, WA

Q: How do you remove radon from your home?

• <div><p>You can vent radon out of your house sometimes by simply opening a window, but it won&rsquo;t remove the source, and will likely rise above recommended levels quickly. A professional will be needed to assess your home, and determine the best strategy for radon removal. Active radon sump pumps and soil depressurization systems are often used to forcefully vent the radon from your home.</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 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>

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: What types of radon mitigation systems are available?

• <div><p>Options include sub-slab depressurization, crawlspace ventilation, and sealing cracks. Choose based on home construction and radon levels.</p></div>

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Verified Reviews for Radon Detection And Reduction pros in Startup, WA

*The Angi rating for Radon Detection And Reduction companies in Startup, 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 Startup, 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 July 23, 2026

Reviewed in July 2026
I’ve used Trident since we bought our house in 2015. They are always spot on. Audell has been out twice and he is always so gracious, knowledgeable, respectful and efficient. This is my go to plumbing company and Audell is my go to favorite. Thank you guys!!!
Trident Plumbing & Drain Cleaning
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Reviewed in January 2025
Robison construction did an excellent job with my new fence and I couldn’t be happier with the results. They’re very professional and easy to work with.
Robison Construction LLC
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Reviewed in December 2024
Quick redponse for a second fall cleaning -- as a result of the bomb cyclone covering the roof two weeks after the initial clean. Friendly, professional techs who cleaned the deck and walkways after blowing limbs, leaves, needles and seeds from the roof
Bob's Quality Window Cleaning
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Reviewed in July 2024
A to Z Stump and Tree surpassed our expectations by far in the quality of the work they did. The 25 foot tree was cut quickly, chipped, and entire cleanup performed. You couldn't tell a tree was just cut down. The next day they came and dug the stump out and within a hour a cleanup was done...
A to Z Stump & Tree Inc
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Reviewed in December 2023
IÃ¢Â Â d give 100 stars if I could! CanÃ¢Â Â t rave enough, Sommer Tree LLC was professional, super with communication, and performed tree and shrub removal beyond our expectations - giving us excellent value for our money. In addition, they spotted a possible safety issue and thinned out a...
SOMMER TREE LLC
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Reviewed in November 2023
They got the job done promptly. Of all the companies that gave me estimates the owner was the most thorough and explaining a variety of options fencing. They always came on the days and times they said they would and the fence looks great!
Trackwest, LLC
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Reviewed in November 2023
Jeff is a clear solutioneer, offering and executing the best ways and means of removing the dead trees on my property and then converting the sizable trunks into firewood. He then stacked the logs in my shed and hauled away the brush. He works clean, effective and smart. He also made valuable...
Pinon Ridge Outdoor Services
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Reviewed in July 2023
They were prompt and at this point we think the spraying of the fruit trees and Dogwood Tree worked.
Senske Services of Seattle
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Reviewed in April 2023
This is the second time we have hired SNR and we were extremely pleased both times. Ray and his wife are a great team. They are fast to respond, very friendly and the work is impeccable. We had them clean our roof, gutters, siding and windows. They left our place looking immaculate.
SNR Window Cleaning & More, LLC
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Reviewed in January 2023
His knowledge of water treatment and his solutions really come thru. He is reliable, has prompt service, and shows up on schedule.
Meadow Lake Water Treatment
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Find Radon detection and reduction specialists in Startup

Serving Startup, 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 Startup, 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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Palm Construction and Remodeling Inc.

4.2(

)

Radon Gas - AbatementRadon Gas - Testing

Serving Startup, 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 Startup, 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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All Pacific Northwest, LLC

5.0(

)

Radon Gas - Abatement

Serving Startup, WA and surrounding areas

In business since 2025

Free estimates

Credit card accepted

"Esmeralda was really professional answered all the questions I had , removed popcorn ceiling from my bedrooms , would highly recommend All Pacific Northwest ?"

Response time3 days

Response rate100%

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Radon Detection and Reduction questions, answered by experts

You can vent radon out of your house sometimes by simply opening a window, but it won’t remove the source, and will likely rise above recommended levels quickly. A professional will be needed to assess your home, and determine the best strategy for radon removal. Active radon sump pumps and soil depressurization systems are often used to forcefully vent the radon from your home.

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.

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

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.

Options include sub-slab depressurization, crawlspace ventilation, and sealing cracks. Choose based on home construction and radon levels.

The Startup, 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

Paige Bennett
•
Feb 10, 2026Feb 10, 2026
How Much Does a Radon Mitigation System Cost in Seattle? [2026 Data]
The cost of a radon mitigation system in Seattle, WA, depends mostly on the type of system being installed. Use this guide to learn about your options.
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Sep 11, 2026Sep 11, 2026
How Much Does Indoor Air Quality Testing Cost in Seattle, WA? [2026 Data]
Find out the average indoor air quality testing cost in Seattle, WA. Learn what you can expect to pay for local air quality assessments and breathe easier.
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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.
Amy Freeman
•
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.
Jacqueline DeMarco
•
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.
Audrey Bruno
•
Jul 8, 2026Jul 8, 2026
How to Test for Radon in Your Home
Knowing how to test for radon will keep your home free and safe from this odorless gas—you just have to decide whether to do it yourself or hire a pro.