Top-rated radon detection and reduction specialists.

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Avatar for J & A Environmental Services

J & A Environmental Services

5.00(
40
)
Approved Pro

J & A Environmental Services

5.00(
40
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
2019 years of experience

Our mission at J & A Environmental Services, LLC is to continue the growth of our business by doing right by all of our clients. We truly care about your health and environment, so we take our jobs very seriously. We offer Mold Remediation, Air Quality Testing, Basement Waterproofing, Odor Removal, and Water Damage Clean-up. J&A Environmental Services, LLC is a fair honest company with excellent customer service. J&A Environmental Services, LLC built the brand by helping one family at a time to eliminate the mold in their environment. Call us 24/7 for all your Environmental needs. We have 100+ five star ratings on Angi's Leads and 34 five star ratings on Angi's Ads.

"Came out for a free estimate and gave a great price to fix my damage and ensure problem areas were fixed for the future. They were able to take care of everything in one day. Set up plenty of barriers to prevent mold spread and keep the rest of the house clean."

Matthew G on September 2025

Our mission at J & A Environmental Services, LLC is to continue the growth of our business by doing right by all of our clients. We truly care about your health and environment, so we take our jobs very seriously. We offer Mold Remediation, Air Quality Testing, Basement Waterproofing, Odor Removal, and Water Damage Clean-up. J&A Environmental Services, LLC is a fair honest company with excellent customer service. J&A Environmental Services, LLC built the brand by helping one family at a time to eliminate the mold in their environment. Call us 24/7 for all your Environmental needs. We have 100+ five star ratings on Angi's Leads and 34 five star ratings on Angi's Ads.

"Came out for a free estimate and gave a great price to fix my damage and ensure problem areas were fixed for the future. They were able to take care of everything in one day. Set up plenty of barriers to prevent mold spread and keep the rest of the house clean."

Matthew G on September 2025


Avatar for Bioclean

Bioclean

5.00(
30
)
Approved Pro

Bioclean

5.00(
30
)
Approved Pro
Customers say: Quick response
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
2003 years of experience

24 HR Service for Water, Mold & Fire Damage in the Philadelphia Area. In business since 2003, we are committed to excellence in restoring homes and commercial buildings in the Philadelphia Area. Certifications in Water Restoration by IICRC, Mold Testing & Air Quality Testing. Cleaning services include, Carpet, Area Rugs & HVAC System.

"Tim was great. Punctual, explained the whole process, and was very personable. Would highly recommend!"

Chris Q on November 2024

24 HR Service for Water, Mold & Fire Damage in the Philadelphia Area. In business since 2003, we are committed to excellence in restoring homes and commercial buildings in the Philadelphia Area. Certifications in Water Restoration by IICRC, Mold Testing & Air Quality Testing. Cleaning services include, Carpet, Area Rugs & HVAC System.

"Tim was great. Punctual, explained the whole process, and was very personable. Would highly recommend!"

Chris Q on November 2024


Avatar for The Radon Bros

The Radon Bros

5.00(
5
)
Approved Pro

The Radon Bros

5.00(
5
)
Approved Pro
Super Service Award
Customers say: Terrific value
2018 years of experience
Free onsite estimate

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.

"They were really helpful and polite they explained the job from start to finish and they explian how radon is harmful."

David R on November 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.

"They were really helpful and polite they explained the job from start to finish and they explian how radon is harmful."

David R on November 2025


Avatar for SIS Mold & Home Inspections

SIS Mold & Home Inspections

5.00(
2
)
Approved Pro

SIS Mold & Home Inspections

5.00(
2
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
2015 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 BOR of Montgomery County

BOR of Montgomery County

5.00(
1
)
Approved Pro

BOR of Montgomery County

5.00(
1
)
Approved Pro
2024 years of experience
Free onsite estimate

At Best Option Restoration of Montgomery County, we specialize in comprehensive disaster restoration services. Our team is dedicated to safeguarding homes and businesses from the damaging effects of mold, water, and storms. Here’s what sets us apart: Mold Remediation: Our certified experts assess and isolate mold contamination, ensuring thorough removal and preventing further spore spread. We identify the root cause, devise effective solutions, and prioritize your safety. 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 Choose Best Option Restoration of Montgomery County for reliable, efficient, and compassionate restoration services. We’re committed to restoring peace of mind and protecting your property.

At Best Option Restoration of Montgomery County, we specialize in comprehensive disaster restoration services. Our team is dedicated to safeguarding homes and businesses from the damaging effects of mold, water, and storms. Here’s what sets us apart: Mold Remediation: Our certified experts assess and isolate mold contamination, ensuring thorough removal and preventing further spore spread. We identify the root cause, devise effective solutions, and prioritize your safety. 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 Choose Best Option Restoration of Montgomery County for reliable, efficient, and compassionate restoration services. We’re committed to restoring peace of mind and protecting your property.


Landmark Inspections LLC

4.99(
97
)

Landmark Inspections LLC

4.99(
97
)
Customers say: True professional
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Landmark Inspections LLC is owned and operated by its founding member/manager ASHI Certified inspector, Scott Freeman .

"Scott from Landmark Inspections performed a home inspection of the home my husband and I are purchasing. We are first time home buyers and this is our first home inspection. We were very impressed with Scott from beginning to end. Before the inspection, he was responsive and communcative, answering every one of our phone calls and emails. The inspection was thorough and Scott and his trainee inspector (also Scott) took the time to answer our questions and explain everything they were doing/finding. The inspection did not feel rushed or like Scott was trying to get through it to move on to the next. The report he sent us (48 hours after the inspection, great turn around time) was very throrough, contained useful information about our future home, and clearly laid out a heirarchy for recommended repairs. We also got a termite inspection, sewer scope inspection (which was also performed incredibly professionally by Melvin from Knox & Knox Solutions), and raydon test. In total, we paid a lot of money for these services, but it was money very well spent. We would not hesitate to recommend Scott, Landmark, and the other service professionals with whom he contracts."

Allison E on September 2020

Landmark Inspections LLC is owned and operated by its founding member/manager ASHI Certified inspector, Scott Freeman .

"Scott from Landmark Inspections performed a home inspection of the home my husband and I are purchasing. We are first time home buyers and this is our first home inspection. We were very impressed with Scott from beginning to end. Before the inspection, he was responsive and communcative, answering every one of our phone calls and emails. The inspection was thorough and Scott and his trainee inspector (also Scott) took the time to answer our questions and explain everything they were doing/finding. The inspection did not feel rushed or like Scott was trying to get through it to move on to the next. The report he sent us (48 hours after the inspection, great turn around time) was very throrough, contained useful information about our future home, and clearly laid out a heirarchy for recommended repairs. We also got a termite inspection, sewer scope inspection (which was also performed incredibly professionally by Melvin from Knox & Knox Solutions), and raydon test. In total, we paid a lot of money for these services, but it was money very well spent. We would not hesitate to recommend Scott, Landmark, and the other service professionals with whom he contracts."

Allison E on September 2020


Avatar for Radon-Rid LLC

Radon-Rid LLC

4.96(
212
)

Radon-Rid LLC

4.96(
212
)
Customers say: True professional
Recommended by 99% of Angi customers
Recommended by 99% of HomeAdvisor customers

With over 220 outstanding reviews, Radon Rid, LLC is a fully insured, licensed, and certified radon testing and radon remediation company. From me to my whole team, our focus is on providing quality, first, last, and always through education, workmanship, and environmental stewardship. We believe our goals are best attained through consideration of not only our customers, but our employees, suppliers, referring agents, and regulatory agencies.

"Very well. All were professional and friendly. Installation was clean. Test result prior to active mitigation was 38.4 and post active mitigation <.03 which is fantastic. Would highly recommend Radon-Rid."

Kathy A on April 2020

With over 220 outstanding reviews, Radon Rid, LLC is a fully insured, licensed, and certified radon testing and radon remediation company. From me to my whole team, our focus is on providing quality, first, last, and always through education, workmanship, and environmental stewardship. We believe our goals are best attained through consideration of not only our customers, but our employees, suppliers, referring agents, and regulatory agencies.

"Very well. All were professional and friendly. Installation was clean. Test result prior to active mitigation was 38.4 and post active mitigation <.03 which is fantastic. Would highly recommend Radon-Rid."

Kathy A on April 2020


Avatar for Royal Water Damage Restoration

Royal Water Damage Restoration

4.95(
106
)

Royal Water Damage Restoration

4.95(
106
)
Customers say: Quick response
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers

For over 20 years, Royal Water Damage Restoration, Inc. has been providing professional and reliable water damage remediation, water removal, smoke, fire, flood cleanup, storm damage, asbestos testing and removal, wet basement drying, and mold services to our clients. We understand the urgency of emergency situations and as such, we are available 24 hours a day, 7 days a week, 365 days a year to attend to your needs. Our staff is highly trained and experienced, and we pride ourselves on always providing you with professional and thorough service. When you contact us, you will always speak with a live person who will dispatch our local, certified, and dedicated technicians to your location anywhere in the Philadelphia, Montgomery, Bucks, Delaware and Chester County areas. We are committed to providing rapid response and ensuring that the job is done right the first time.

"This was my first experience with this company and they exceeded expectations. The remediation was performed in a conpetent manner they alleviated the problem with the water damage and mole."

Rev. Dr. Robert C on September 2025

For over 20 years, Royal Water Damage Restoration, Inc. has been providing professional and reliable water damage remediation, water removal, smoke, fire, flood cleanup, storm damage, asbestos testing and removal, wet basement drying, and mold services to our clients. We understand the urgency of emergency situations and as such, we are available 24 hours a day, 7 days a week, 365 days a year to attend to your needs. Our staff is highly trained and experienced, and we pride ourselves on always providing you with professional and thorough service. When you contact us, you will always speak with a live person who will dispatch our local, certified, and dedicated technicians to your location anywhere in the Philadelphia, Montgomery, Bucks, Delaware and Chester County areas. We are committed to providing rapid response and ensuring that the job is done right the first time.

"This was my first experience with this company and they exceeded expectations. The remediation was performed in a conpetent manner they alleviated the problem with the water damage and mole."

Rev. Dr. Robert C on September 2025


"Nick was extremely thorough and knowledgeable. He went well above and beyond my expectations for a home inspection. Described in detail every potential issue from the absolute minor to the major. Nick's attention to detail was so good that he even pointed out how the HVAC contractor used the wrong kind of tape to affix the ducts to each other. He also has a lot of knowledge about the area, its history and how that affects the construction of the old homes that are so common here. I was absolutely blown away by Nick's work and strongly believe that no one should ever buy a house without having Nick and Strong Foundations inspect it."

Robert J on March 2021

LICENSE #24376.

"Nick was extremely thorough and knowledgeable. He went well above and beyond my expectations for a home inspection. Described in detail every potential issue from the absolute minor to the major. Nick's attention to detail was so good that he even pointed out how the HVAC contractor used the wrong kind of tape to affix the ducts to each other. He also has a lot of knowledge about the area, its history and how that affects the construction of the old homes that are so common here. I was absolutely blown away by Nick's work and strongly believe that no one should ever buy a house without having Nick and Strong Foundations inspect it."

Robert J on March 2021


Avatar for Keystone Inspection Service

Keystone Inspection Service

4.93(
58
)

Keystone Inspection Service

4.93(
58
)
Customers say: Super punctual
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers

KEYSTONE INSPECTION SERVICE has been in the Pennsylvania building / home inspection business since 1988 and has performed over 80,000 building / home inspections for more than 50,000 clients in Pennsylvania. We are a full time, full service building / home inspection company committed to providing our clients with an honest, objective evaluation of the condition of the home and its major systems. KEYSTONE INSPECTION SERVICE is a multi-inspector firm. Our building / home inspectors bring to the organization a variety of experience and specializations including engineering, construction, and environmental, thereby enabling us to provide you with the "right" inspector for your building / home inspection. KEYSTONE INSPECTION SERVICE knows and understands the time constraints sometimes imposed in a real estate transaction, and will make every effort to meet your deadline. We will not promise you delivery of a service we cannot provide. KEYSTONE INSPECTION SERVICE highly recommends that you attend the building / home inspection and, in order to accommodate your schedule, we inspect 7 days a week. We will provide you with a computer generated report - complete with color photos and inspection highlights - posted for you on an exclusive secure website the next business day. In addition, our inspectors are available to answer your questions long after the day of the building / home inspection. If you buy the house, this service continues for as long as you live in the house.

"Gene (our inspector) was very knowledgable, friendly, and professional. High attention to detail and kept us up to date throughout the inspection. Report very thorough and included helpful photographs. Highly recommend."

Michael M on September 2020

KEYSTONE INSPECTION SERVICE has been in the Pennsylvania building / home inspection business since 1988 and has performed over 80,000 building / home inspections for more than 50,000 clients in Pennsylvania. We are a full time, full service building / home inspection company committed to providing our clients with an honest, objective evaluation of the condition of the home and its major systems. KEYSTONE INSPECTION SERVICE is a multi-inspector firm. Our building / home inspectors bring to the organization a variety of experience and specializations including engineering, construction, and environmental, thereby enabling us to provide you with the "right" inspector for your building / home inspection. KEYSTONE INSPECTION SERVICE knows and understands the time constraints sometimes imposed in a real estate transaction, and will make every effort to meet your deadline. We will not promise you delivery of a service we cannot provide. KEYSTONE INSPECTION SERVICE highly recommends that you attend the building / home inspection and, in order to accommodate your schedule, we inspect 7 days a week. We will provide you with a computer generated report - complete with color photos and inspection highlights - posted for you on an exclusive secure website the next business day. In addition, our inspectors are available to answer your questions long after the day of the building / home inspection. If you buy the house, this service continues for as long as you live in the house.

"Gene (our inspector) was very knowledgable, friendly, and professional. High attention to detail and kept us up to date throughout the inspection. Report very thorough and included helpful photographs. Highly recommend."

Michael M on September 2020

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Radon Detection and Reduction questions, answered by experts

Long-term exposure increases lung cancer risks. Prolonged homestay individuals and smokers encounter heightened vulnerability and exposure concerns.

It is possible to test for radon yourself using DIY radon test kits, but these at-home test kits should never be a replacement for professional radon testing. DIY test kits can provide some information about radon exposure in your house, but your indoor temperature and humidity can affect the results, as can improper usage of the test kit. You could save yourself some money by hiring a radon professional to begin with, and when it comes to your family’s safety, hiring an experienced professional to do the testing is usually the best option.

The soil beneath your house is most likely what’s causing an increased level of radon. This is because soil holds radioactivity for a long time and it’s also what most buildings are built on. Another common source of radon is water from a source that hasn’t been through periodic radon tests, such as well water. Over time, the radon from the soil can inhabit other parts of your house like the foundation or plumbing.

A professional indoor air quality inspection takes anywhere from one to three hours, depending on the size of your home and the number of necessary samples. After the test, the specialist will discuss the findings, but you won’t get a full written report for 2 to 10 days, though you can ask your pro to expedite the process, if needed. 

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 Wyndmoor, PA homeowners’ guide to radon detection and reduction services

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