Google reviewers rate RDS Environmental 4.9 out of 5 based on 188 reviews, with the owner responding to 69 percent of them. Customers frequently praise the company for punctual arrivals, efficient installation of radon mitigation systems, and clear communication regarding options and pricing. Recurring themes include professional conduct, thorough cleanup, and successful reduction of radon levels. Some lower-rated feedback cites delays in completing projects or receiving test results, as well as instances where installed equipment did not match specific customer requirements.
Google rating: 4.9 out of 5 from 188 reviews (97% five-star).
Reviews on this page: 188 Google reviews (164 with written comments, 2 with photos).
Owner responses: the business replied to 69% of reviews.
Most recent review: October 22, 2026.
Service: Radon Testing Service serving Westminster, Colorado.
Data from Google, last updated October 26, 2026.
Photos
Customer reviews
4.9
★★★★★
188 reviews on Google
5★182
4★3
3★1
2★2
1★0
Reviews from Google, shown as published (original wording, unedited).
SF
Spencer FlandersLocal Guide · 30 reviews
★★★★★
I'm happy with the work they did and would recommend. Very friendly folks and didn't mind all my questions when they were installing.
Response from the owner · 4 days ago
Thank you for the recommendation, Spencer! We're so glad our team could answer all your questions during the installation and provide a great experience. We truly appreciate your business!
Very kind. Very knowledgeable. Made it work where we needed despite someone else saying it wasn't possible. Really appreciated them.
Response from the owner · 4 days ago
Thank you so much for the great review, Jeremy! We are so glad our team could find a solution that worked for you when others couldn't. We truly appreciate your business and kind words!
The RDS crew worked quickly and efficiently plus found a way to install the radon system that saved me money.
Response from the owner · 6 days ago
Thanks for the great review, Rich! We're glad our team was able to work efficiently and save you money on your radon mitigation system. We appreciate your business!
I worked with Eric mainly, but also Don helped too. They installed a Radon mitigation system this spring for us. It works very well, their pricing is the best in the area for a quality radon system. I got I think 4-5 quotes from the highest rated Radon mitigation installers.
We also, just had a problem with our sensor on the system. Within less than 2 hours Eric was out here and fixed it.
This is a legitimate company.
Response from the owner · 6 days ago
Hi Ryan, thank you so much for the great review! We're glad to hear that Eric and Don took good care of you and that your radon mitigation system is working well. We appreciate your business and are always here to help whenever you need us!
RDS was so great to work with. Nate helped us map out a complex mitigation system, install team was so great and testing showed our space go from 7 to .5. Very happy with service and value!!
Response from the owner · a week ago
Thank you so much for the great review, Dana! We are thrilled to hear that Nate and our installation team were able to get your radon mitigation system set up and drop your levels down to 0.5. We truly appreciate your business and kind words!
I have worked with RDS now on 2 separate properties. Both cases, Scott was the foreman. He does an impeccable job and treats each project as if it were his own
We are very pleased and would recommend RDS every time
Response from the owner · 2 weeks ago
Thanks for the great review, Greg! We are so glad to hear that Scott took such excellent care of both your properties. We truly appreciate your recommendation!
The whole process from getting the quote to install (shoutout to Manny and Scott) was very smooth and easy. The system is pretty unobtrusive and quiet. Thank you!
Response from the owner · 3 weeks ago
Thank you, Laura! We're so glad to hear that Manny and Scott made the installation process smooth and easy for you, and that you're happy with how quiet the system is.
RDS showed up on time, and in 3 hours, Manny and Scott had installed my radon mitigation system, sealed the crawl space and cleaned up after themselves. The process was as smooth as I could have hoped for. Now to test in a few days to verify resolution of the radon. IThe company has been easy to work with.
Response from the owner · 3 weeks ago
Thank you, Stephanie! We’re so glad Manny and Scott could make the installation of your radon mitigation system quick and smooth. Best of luck with your upcoming test, and thank you for choosing RDS!