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J & A Environmental Services
J & A Environmental Services
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.
"They were amazing to work with and they had the work done in about half a day."
Crystal A on December 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.
"They were amazing to work with and they had the work done in about half a day."
Crystal A on December 2025

Bioclean
Bioclean
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

The Radon Bros
The Radon Bros
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

SIS Mold & Home Inspections
SIS Mold & Home Inspections
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

Landmark Inspections LLC
Landmark Inspections LLC
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

Radon-Rid LLC
Radon-Rid LLC
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
"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
Reliable Home Inspection Service
Reliable Home Inspection Service
Reliable Home Inspection Service offers a variety of inspections related to the real estate transaction; Serving Delaware, Maryland and Pennsylvania, you can be assured that you will receive excellent customer service, especially with our one stop shop philosophy. Our computer generated report, which is delivered on-site, has been recognized nationally and locally as an extremely helpful tool for the real estate transaction. With 24-7 availability for scheduling and customer service, we are here to help serve you! We also offer a variety of discounts for you and look forward to the opportunity to be on your team and provide impeccable service to you as a buyer and seller.
"Paul Duhamel performed home inspection and everything went wells, It took about 3 hrs and he notified few issues in the house and he answered to all my questions. Very professional and to the point. I refereed to my friends and even he is also happy with the inspection they performed."
Sirisha B on June 2019
Reliable Home Inspection Service offers a variety of inspections related to the real estate transaction; Serving Delaware, Maryland and Pennsylvania, you can be assured that you will receive excellent customer service, especially with our one stop shop philosophy. Our computer generated report, which is delivered on-site, has been recognized nationally and locally as an extremely helpful tool for the real estate transaction. With 24-7 availability for scheduling and customer service, we are here to help serve you! We also offer a variety of discounts for you and look forward to the opportunity to be on your team and provide impeccable service to you as a buyer and seller.
"Paul Duhamel performed home inspection and everything went wells, It took about 3 hrs and he notified few issues in the house and he answered to all my questions. Very professional and to the point. I refereed to my friends and even he is also happy with the inspection they performed."
Sirisha B on June 2019

Keystone Inspection Service
Keystone Inspection Service
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

Environmental Testing & Research Laboratories, Inc
Environmental Testing & Research Laboratories, Inc
ETR Laboratories in an analytic laboratory with a broad range of commercial, industrial and individual clients. We provide analytic services using a wide variety of scientific methods including GC/MS, IC/MS, GIR, NMR and SEM equipment. We can do particle analysis, organic and inorganic chemical analysis and micro analysis on biological and other materials. Private water analysis is our specialty. Award winning. Additional DBA - Environmental Testing & Research Laboratories Inc, ETR Labs, ETR Laboratories.
"as advertised"
Nancy C on July 2018
ETR Laboratories in an analytic laboratory with a broad range of commercial, industrial and individual clients. We provide analytic services using a wide variety of scientific methods including GC/MS, IC/MS, GIR, NMR and SEM equipment. We can do particle analysis, organic and inorganic chemical analysis and micro analysis on biological and other materials. Private water analysis is our specialty. Award winning. Additional DBA - Environmental Testing & Research Laboratories Inc, ETR Labs, ETR Laboratories.
"as advertised"
Nancy C on July 2018
Verified Reviews for Radon Detection And Reduction pros in Thorndale, PA
*The Angi rating for Radon Detection And Reduction companies in Thorndale, PA 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 Thorndale, PA 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 December 30, 2025
The Thorndale, PA 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.

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.
•Discover the average indoor air quality testing cost, what impacts pricing, and how to budget for healthier air in your home.
•Find out what impacts radon testing costs, including average prices for DIY kits and professional services, so you can protect your home and budget confidently.

Can a homeowner install a radon mitigation system? While some parts of the project are fine for DIY, you should leave the meat of the task to a licensed professional.

How long does a radon fan last? Depending on the quality of the fan, usage, and maintenance, a radon fan can last five to ten years.

Radon is a radioactive gas that can enter a home from the ground. Prepare yourself for mitigation by answering these questions before hiring a pro.
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