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Verified Reviews for Radon Detection And Reduction pros in Monmouth, OR

*The Angi rating for Radon Detection And Reduction companies in Monmouth, 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 Monmouth, 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 January 14, 2026

Find Radon detection and reduction specialists in Monmouth

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

Serving Monmouth, 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 Nordic Service Group, LLC
Nordic Service Group, LLC
5.0(
4
)

Serving Monmouth, OR and surrounding areas

Approved

In business since 2024

Free estimates

Credit card accepted

"Chris was fantastic to talk to about what he checks for during the inspection and what i should expect to see on his report. Chris was on time, incredibly thorough and detailed. I highly recommend him to anyone looking for a great home inspector."
Response time3 hrs
Response rate92%
36 neighbors recently requested a quote
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Avatar for John's Waterproofing Co.
John's Waterproofing Co.
4.0(
71
)

Serving Monmouth, 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
219 neighbors recently requested a quote
Recommended by93%of homeowners
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Avatar for Gorge Quality Home Inspection
Gorge Quality Home Inspection
5.0(
3
)

Serving Monmouth, OR and surrounding areas

In business since 2019

"Greg is always prompt in responding to scheduling and has a quick turnaround on reports too. I like his reports because they have plenty of pictures and he takes the time with buyers to answer any questions whether it be on site or following up on the report."
Recommended by100%of homeowners
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Environmental Testing & Training NorthWest
4.0(
1
)

Serving Monmouth, OR and surrounding areas

In business since 2011

Free estimates

Credit card accepted

"The company rep collected site samples quickly ... in and out in about 20 minutes. And, the company turned the report around in two days. The service was a pricy, mostly due to the fixed call-out fee. The cost per sample was higher than one other instance that I know of but not unreasonable."
Response time12 hrs
Recommended by100%of homeowners
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All Corners Home Inspections
New to Angi

Serving Monmouth, OR and surrounding areas

In business since 2014

Free estimates

Emergency services offered

All Corners Home Inspections is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

Response time1 day
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Radon Detection and Reduction questions, 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.

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.

Radon is present almost everywhere but, like sunlight, the concentration levels and how often you are exposed to it have a large part to play in just how dangerous it is. There are levels of radon that are acceptable inside a house, but above a certain limit, radon becomes a serious radioactive hazard that is a known cause of lung cancer. In fact, radon exposure is the number two leading cause of lung cancer (after smoking).

The average radon mitigation system uses about 876 kWh of electricity per year, although the exact amount of electricity used will vary depending on the size of the radon fan. Once the system is installed, the annual increase to your energy bill could range from $30 to $300 per year, again depending on the size of the fan.

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

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