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*The Angi rating for Radon Detection And Reduction companies in Forest Grove, OR 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 Forest Grove, OR 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 10, 2026

Find Radon detection and reduction specialists in Forest Grove

Avatar for Alpha Environmental Services Inc
Alpha Environmental Services Inc
4.7(
134
)

Serving Forest Grove, OR and surrounding areas

Approved

In business since 2002

Free estimates

Warranties offered

"From initial inspection to mitigation was about a week. Technician were punctual and finished within time estimated."
Heating Oil Tank
Radon Reduction System
Removal of Underground Tank
Response time1 day
Recommended by85%of homeowners
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Avatar for Rose City Laboratories, LLC
Rose City Laboratories, LLC
5.0(
2
)

Serving Forest Grove, OR and surrounding areas

Approved

In business since 2012

Free estimates

Small jobs welcome

Science First. We are experts in our field and we will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business.

Response time2 days
Response rate90%
Recommended by100%of homeowners
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Avatar for Nordic Service Group, LLC
Nordic Service Group, LLC
5.0(
4
)

Serving Forest Grove, OR and surrounding areas

Approved

In business since 2024

Free estimates

Credit card accepted

"Nordic Service Group responded quickly to my inspection request and agreed to meet my schedule for the inspection. The inspector showed up on time, actually early, and exceeded my expectation with the inspection report. This is a professional who really knows homes. Why take a chance with anyone else? Steve"
Response time3 hrs
Response rate92%
37 neighbors recently requested a quote
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Avatar for John's Waterproofing Co.
John's Waterproofing Co.
4.0(
71
)

Serving Forest Grove, OR and surrounding areas

Approved

In business since 1974

Free estimates

Warranties offered

"You will need make sure everything is explained and understand what is included as maintenance."
Encapsulation System
Before Encapsulation
Before Interior Drain System
After Interior Drain System
Finished basement

+38

Response time6 hrs
215 neighbors recently requested a quote
Recommended by93%of homeowners
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Avatar for Sigman Home Inspection, LLC
Sigman Home Inspection, LLC
4.8(
23
)

Serving Forest Grove, OR and surrounding areas

In business since 2015

Credit card accepted

"Did a great job and explained everything very thoroughly. The radon test was completed in two days and the results were immediately emailed to me."
Crawlspace
Sun Nuclear 1028 Radon Monitor
Response time3 hrs
Recommended by100%of homeowners
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Radon Detection and Reduction questions, answered by experts

Radon enters your home when warm air begins to rise and exits through the roof, creating a vacuum that pulls cooler air from under the foundation. Part of that air is radon, which is an invisible, odorless gas that develops naturally when radioactive particles are deep within the ground. Those particles usually come from decaying matter in soil and rocks.

The cost for a radon mitigation system typically ranges from $800 to $1,500, with an average around $1,000. The final price depends on several factors, including the size of your home, the severity of the radon issue, and the type of system required. Your home's foundation type also significantly impacts the cost. For example, sealing and ventilating an unfinished basement might cost around $4,600, while encapsulating a crawl space without a foundation slab can range from $1,500 to $15,000.

No, air purifiers are not an effective way to reduce or remove radon. Radon is a radioactive, inert gas that cannot be filtered by standard air purifiers, which are designed to capture particulates like dust and mold. While an air purifier can improve indoor air quality by removing other pollutants, it should not be relied upon for radon. The only effective solution for high radon levels is a dedicated radon mitigation system.

Ideally, no one will live in a house with elevated radon levels, as prolonged exposure increases the risk of serious health issues like lung cancer. However, homes with radon can be made safe through mitigation systems, such as active soil depressurization. Testing for radon regularly and addressing high levels helps ensure a safe living environment.

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.

The Forest Grove, OR homeowners’ guide to radon detection and reduction services

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