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Radon gas testers in Swarthmore

Avatar for SIS Mold & Home Inspections

SIS Mold & Home Inspections

1172 Skelp Level Rd
5.00(
2
)
•Approved Pro

SIS Mold & Home Inspections

1172 Skelp Level Rd
5.00(
2
)
•Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
10 years of experience

We are a small, veteran-owned local business, your safety is our priority. We inspect and test for mold and radon. SIS only performs testing and inspections, not remediation. We have no conflict of interest. For mold testing and inspections, you will receive a report that is clear and easy to understand with lab results interpreted. The mold inspector has done thousands of inspections and tests in the Delaware valley and keeps current with mold education. For radon testing, SIS uses Continuous Radon Monitors (CRM's) to perform short term tests. We provide professional test results and reports. PA state license # 3589 and nationally certified (NRPP).

"Bob from SIS is a straight shooter, provides options, clear explanations and associated costs on the necessary steps to remediate the problem. Good communication, timely and professional. Pleasantly surprised with my experience with SIS and the contractor they recommended to do the work. Easy 5-star rating, not too common these days."

Dennis H on February 2024

We are a small, veteran-owned local business, your safety is our priority. We inspect and test for mold and radon. SIS only performs testing and inspections, not remediation. We have no conflict of interest. For mold testing and inspections, you will receive a report that is clear and easy to understand with lab results interpreted. The mold inspector has done thousands of inspections and tests in the Delaware valley and keeps current with mold education. For radon testing, SIS uses Continuous Radon Monitors (CRM's) to perform short term tests. We provide professional test results and reports. PA state license # 3589 and nationally certified (NRPP).

"Bob from SIS is a straight shooter, provides options, clear explanations and associated costs on the necessary steps to remediate the problem. Good communication, timely and professional. Pleasantly surprised with my experience with SIS and the contractor they recommended to do the work. Easy 5-star rating, not too common these days."

Dennis H on February 2024

Avatar for The Radon Bros LLC

The Radon Bros LLC

2522 Deep Creek Rd
4.86(
11
)
•Approved Pro

The Radon Bros LLC

2522 Deep Creek Rd
4.86(
11
)
•Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
203 local quotes requested

The Radon Bros LLC 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.

"They didn't clean up, but it was a basement."

Dan K on May 2025

The Radon Bros LLC 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.

"They didn't clean up, but it was a basement."

Dan K on May 2025

Avatar for The Radon Bros

The Radon Bros

5.00(
4
)
•Approved Pro

The Radon Bros

5.00(
4
)
•Approved Pro
Customers say: Terrific value
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
568 local quotes requested

The Radon Bros is a certified provider specializing in radon testing, mitigation, and system repairs for homes, businesses, and schools across Pennsylvania, Delaware, and Maryland. They also offer mold testing and comprehensive indoor air quality assessments to ensure safer living and working environments. The company provides tailored solutions, including radon system installation and expert consultations for contractors, with a commitment to safety, health, and air quality.

"Went well"

Kenneth H on July 2025

The Radon Bros is a certified provider specializing in radon testing, mitigation, and system repairs for homes, businesses, and schools across Pennsylvania, Delaware, and Maryland. They also offer mold testing and comprehensive indoor air quality assessments to ensure safer living and working environments. The company provides tailored solutions, including radon system installation and expert consultations for contractors, with a commitment to safety, health, and air quality.

"Went well"

Kenneth H on July 2025

Avatar for JIMENEZ AND SON'S

JIMENEZ AND SON'S

4703 East Howell Street
4.88(
32
)
•Approved Pro

JIMENEZ AND SON'S

4703 East Howell Street
4.88(
32
)
•Approved Pro
Customers say: Quality work
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
535 local quotes requested

Jimenez And Son's L.L.C Involves, general demolition, concrete, electric, plumbing, pools, ponds, drywall, home remodeling, and mold remediation, as well as many more We are a team that goes above and beyond in their quest for our customer's satisfaction and happiness. WE ARE A ONE STOP SHOP! There is no need for multiple contractors. Both owners have been working together since they were 13, even receiving their working papers together, as well doing the actual work to this day. We live a lifestyle to help others, and that's it. Overall, we work with 100% professionalism, while also working at an efficient pace and having a great attitude. 😃 Give us a call @ 267-773-2801 OR @ 215-558-0693

"The guys were very courteous,they cleaned up when they were done definitely hire them again."

Joseph H on August 2025

Jimenez And Son's L.L.C Involves, general demolition, concrete, electric, plumbing, pools, ponds, drywall, home remodeling, and mold remediation, as well as many more We are a team that goes above and beyond in their quest for our customer's satisfaction and happiness. WE ARE A ONE STOP SHOP! There is no need for multiple contractors. Both owners have been working together since they were 13, even receiving their working papers together, as well doing the actual work to this day. We live a lifestyle to help others, and that's it. Overall, we work with 100% professionalism, while also working at an efficient pace and having a great attitude. 😃 Give us a call @ 267-773-2801 OR @ 215-558-0693

"The guys were very courteous,they cleaned up when they were done definitely hire them again."

Joseph H on August 2025

Avatar for ACI-Tech Inc

ACI-Tech Inc

2300 W 4th St #6
4.78(
46
)
•Approved Pro

ACI-Tech Inc

2300 W 4th St #6
4.78(
46
)
•Approved Pro
Customers say: Quality work
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
509 local quotes requested

ACI-Tech Inc. is a licensed and fully-certified provider of remediation services. Asbestos removal is not offered in New Jersey.

"Everything went great. From the estimate to scheduling to the work that was completed the job went smoothly."

Adam R on July 2025

ACI-Tech Inc. is a licensed and fully-certified provider of remediation services. Asbestos removal is not offered in New Jersey.

"Everything went great. From the estimate to scheduling to the work that was completed the job went smoothly."

Adam R on July 2025

Avatar for EcoTech Restoration Solutions

EcoTech Restoration Solutions

630 S Atlantic Ave
4.56(
27
)
•Approved Pro

EcoTech Restoration Solutions

630 S Atlantic Ave
4.56(
27
)
•Approved Pro
Customers say: Super punctual
911 local quotes requested
15 years of experience

Problem. Solved. EcoTech understands the worry and inconvenience that stem from a problem striking your home. Whether it be mold removal and remediation problems, or water, fire, and sewage damage issues our approach is to provide practical, timely, and lasting solutions for our customers that will ensure peace-of-mind. Our dedicated and skilled team of experts is trained to evaluate your situation, develop a comprehensive plan, and manage your project successfully. With a focus and commitment on quality for our customers, you can rest assured with EcoTech your Problem: Solved.

"They came and assessed the damage and told me they would give me an estimate in a couple of days. NO CONTACT SINCE, NEVER AN EMAIL OR PHONE CALL, NOTHING. I am very disappointed in them. In fact I contacted two other recommended contacts from Angie's list, NONE OF THEM GOT BACK TO US."

Jerome and Paulette L on July 2018

Problem. Solved. EcoTech understands the worry and inconvenience that stem from a problem striking your home. Whether it be mold removal and remediation problems, or water, fire, and sewage damage issues our approach is to provide practical, timely, and lasting solutions for our customers that will ensure peace-of-mind. Our dedicated and skilled team of experts is trained to evaluate your situation, develop a comprehensive plan, and manage your project successfully. With a focus and commitment on quality for our customers, you can rest assured with EcoTech your Problem: Solved.

"They came and assessed the damage and told me they would give me an estimate in a couple of days. NO CONTACT SINCE, NEVER AN EMAIL OR PHONE CALL, NOTHING. I am very disappointed in them. In fact I contacted two other recommended contacts from Angie's list, NONE OF THEM GOT BACK TO US."

Jerome and Paulette L on July 2018

Avatar for Tri State Flood Inc

Tri State Flood Inc

10 Grant Ave W
2.00(
1
)
•Approved Pro

Tri State Flood Inc

10 Grant Ave W
2.00(
1
)
•Approved Pro
1796 local quotes requested
21 years of experience

At Tri State Flood Inc, we specialize in comprehensive disaster restoration services. Our team is dedicated to safeguarding homes and businesses from the damaging effects of water, fires, mold and storms. Here’s what sets us apart: Water Removal and Storm Damage Restoration: When water wreaks havoc due to storms or other incidents, we’re here to help. Our 24/7 emergency response team swiftly tackles water extraction, drying, and structural repairs. Comprehensive Services: Beyond mold and water remediation, we handle storm damage repairs, basement flood cleanup and fire restoration. Choose Tri State Flood Inc for reliable, efficient, and compassionate restoration services. We’re committed to restoring peace of mind and protecting your property.

"Lesson learned. Always get an estimate. BEFORE the work is done. At least a digital copy. Arrangements for the project were made, with some one named Lynn, for the company to send someone to complete the work. We were quoted over the phone 4500-5000 which included a mold test. A sub contractor with an entirely different company (National Mold Company) was sent. When the contractor arrived, he stated that the job would be much more simpler than first thought. This led us to believe that the job would cost less, no. All said and done, they charged $5500. All said and done, it's almost like no work was done. The stains and the smell are still there. Only one actual board was taken upon the attic room. The ceiling in the bedroom was primed and painted but are still visible and have a funky smell. At this point I'm going to. Do what we should have done; Do the job ourselves. Just now with $5500 less dollars in our pockets. A detailed receipt was not given even though it was requested."

David B on August 2025

At Tri State Flood Inc, we specialize in comprehensive disaster restoration services. Our team is dedicated to safeguarding homes and businesses from the damaging effects of water, fires, mold and storms. Here’s what sets us apart: Water Removal and Storm Damage Restoration: When water wreaks havoc due to storms or other incidents, we’re here to help. Our 24/7 emergency response team swiftly tackles water extraction, drying, and structural repairs. Comprehensive Services: Beyond mold and water remediation, we handle storm damage repairs, basement flood cleanup and fire restoration. Choose Tri State Flood Inc for reliable, efficient, and compassionate restoration services. We’re committed to restoring peace of mind and protecting your property.

"Lesson learned. Always get an estimate. BEFORE the work is done. At least a digital copy. Arrangements for the project were made, with some one named Lynn, for the company to send someone to complete the work. We were quoted over the phone 4500-5000 which included a mold test. A sub contractor with an entirely different company (National Mold Company) was sent. When the contractor arrived, he stated that the job would be much more simpler than first thought. This led us to believe that the job would cost less, no. All said and done, they charged $5500. All said and done, it's almost like no work was done. The stains and the smell are still there. Only one actual board was taken upon the attic room. The ceiling in the bedroom was primed and painted but are still visible and have a funky smell. At this point I'm going to. Do what we should have done; Do the job ourselves. Just now with $5500 less dollars in our pockets. A detailed receipt was not given even though it was requested."

David B on August 2025

Avatar for Radon Shield LLC

Radon Shield LLC

757 Beatty St
4.85(
97
)
•Approved Pro

Radon Shield LLC

757 Beatty St
4.85(
97
)
•Approved Pro
Customers say: Quick response
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
4988 local quotes requested

Radon Shield, LLC is your premier choice for Radon testing and mitigations in New Jersey, New York, and Pennsylvania . We provide high quality work and friendly customer service.You do not need to overpay to get Radon out, We can help. Call today for Professional service you can afford! Our team of professionals include New Jersey certified Radon mitigation specialist(#MIS13009) and Pennsylvania certified Radon mitigation professional(#3055). We are fully insured. Additional email: info@radonshieldllc.com

"Benedict was able to schedule me quickly for remediation. He put my mind at ease. They worked quickly and the space was spotless when they were done. He explained every step and the system in place has really done the job. He has been a pleasure to work with."

Sandra J on November 2024

Radon Shield, LLC is your premier choice for Radon testing and mitigations in New Jersey, New York, and Pennsylvania . We provide high quality work and friendly customer service.You do not need to overpay to get Radon out, We can help. Call today for Professional service you can afford! Our team of professionals include New Jersey certified Radon mitigation specialist(#MIS13009) and Pennsylvania certified Radon mitigation professional(#3055). We are fully insured. Additional email: info@radonshieldllc.com

"Benedict was able to schedule me quickly for remediation. He put my mind at ease. They worked quickly and the space was spotless when they were done. He explained every step and the system in place has really done the job. He has been a pleasure to work with."

Sandra J on November 2024

Chadds Ford Climate Control, Inc.

144 Fairville Rd
4.77(
13
)

Chadds Ford Climate Control, Inc.

144 Fairville Rd
4.77(
13
)
Customers say: Quick response
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers

WELCOME TO CHADDS FORD CLIMATE CONTROL! Chadds Ford Climate Control offers a broad range of skilled services to create a more comfortable, productive, and rewarding home and work environment. We promote superior efficiency, convenience, and accessibility through proven effective equipment and procedures. Our certified technicians bring you safe and viable solutions to the design/build, retrofit, maintenance, and repair of all types of heating and cooling systems, including ductless and geothermal, air quality improvements, thermostats, back up generators, water heaters, and electrical and plumbing services.

"Everything was Great, Very Professional Company.Would Hire again."

Ed P on December 2020

WELCOME TO CHADDS FORD CLIMATE CONTROL! Chadds Ford Climate Control offers a broad range of skilled services to create a more comfortable, productive, and rewarding home and work environment. We promote superior efficiency, convenience, and accessibility through proven effective equipment and procedures. Our certified technicians bring you safe and viable solutions to the design/build, retrofit, maintenance, and repair of all types of heating and cooling systems, including ductless and geothermal, air quality improvements, thermostats, back up generators, water heaters, and electrical and plumbing services.

"Everything was Great, Very Professional Company.Would Hire again."

Ed P on December 2020

Residential Mold Services

301 Harrison Avenue
No reviews yet

Residential Mold Services

301 Harrison Avenue
No reviews yet
21 years of experience

Small family run business with years of experience in home construction and mold remediation. Provide detailed inspections, testing, and remediation. LEED Green Associate on staff. Member of Sustainable Business Network.

Small family run business with years of experience in home construction and mold remediation. Provide detailed inspections, testing, and remediation. LEED Green Associate on staff. Member of Sustainable Business Network.

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FAQs for radon gas testing projects in Swarthmore, PA

Radon is the second leading cause of lung cancer in the U.S. The gas seeps through cracks in foundations and collects in basements and other low areas. Once you breathe it in, radioactive particles lodge in lung tissue and do long-term damage. Because you can’t see or smell radon, the EPA recommends testing your home every two years—and after major renovations—to keep your family safe.

Yes—every home should be tested. The EPA advises doing it at least every two years and any time you remodel, buy, or sell. On average, one in 15 houses nationwide sits above the recommended limit, and the only way to know where yours stands is a formal test. The equipment simply measures gas levels and won’t change your indoor environment, so the process is completely harmless.

Certified radon professionals—often home inspectors or dedicated radon mitigation contractors—handle testing. These radon testing professionals follow EPA protocols and use calibrated instruments to check levels throughout your house. Hiring a certified radon specialist means results you can trust for real estate deals, insurance requirements, and, most importantly, your family’s health.

Inspectors specialize in measuring radon gas levels, while licensed mitigation contractors design and install the systems that remove it. If your test comes back high, your inspector can point you to a qualified mitigation pro who will size and install the right fan, piping, or other equipment to bring levels down.

No—standard home air purifiers don’t touch radon. They’re built to trap dust and pollen, not radioactive gas. If testing shows high levels, you’ll need a dedicated mitigation system that vents the gas from beneath your home to the outdoors. Relying on a room purifier alone won’t keep your indoor air safe.

Opening a few windows in your home might dilute radon for a short time, but the gas seeps back in as soon as they’re closed. For a lasting fix, you’ll need a professional mitigation system—often a sub-slab depressurization fan—that pulls radon from beneath the foundation and safely vents it outside.

The Swarthmore, PA homeowners’ guide to radon gas testings

From average costs to expert advice, get all the answers you need to get your job done.

See all articles