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Advanced Radon Mitigation & Water Treatment is a Hooksett, NH company that's been testing and treating radon and well water since 1998, serving homeowners, realtors, and builders across southern, central and coastal New Hampshire. The technicians customers name most often — Keith, Cory, Cody — come up again and again for walking people through what's actually happening in their basement or their water. Customers describe a similar visit over and over: a tech shows up on time, explains the radon or water issue in plain language, and lays out options before doing the work. One reviewer who dealt with 14 pCi/L of radon in their basement says their level dropped to under 1 pCi/L after installation; another chose the company specifically because it was the only one they found using licensed plumbers and electricians for the install rather than in-house crews without those licenses. Several customers have stuck around for years — one mentions almost 20 years with the company, another 12 — coming back for water softener and filtration servicing as well as the original radon system. The one real complaint on file, from a 2021 review, describes a water filtration system installed to fix iron staining that reportedly stopped working within about a year, after more than $3,000 was already paid — worth asking upfront what recourse looks like if a treatment system underperforms. For radon testing and mitigation or well water treatment in the Hooksett area and across New Hampshire, this is a company with almost three decades behind it and named technicians customers keep asking for — just get clear terms on performance guarantees before signing for a water system.
Their techs are very knowledgeable and I have always (12 years) been impressed with their service.
Great company and great people Keith came out and discussed alit with me. This company cares about the people not the money! Much appreciated ill be calling them back if needed again! Thank you Keith for all the knowledge
I recently decided to have our water tested and treated. We have had a point of use Reverse Osmosis system for years but anyone who knows, knows it takes several minutes to fill a pot. Also it only treats the water from that small spout. You are still washing your body and clothes in untreated water not to mention brushing your teeth. Anyway my son has used Advanced Radon Mitigation on two separate properties and speaks very highly of them so I figured I would give them a chance. I wasn't disappointed. Now, I understand that "things happen" and they did. My brand new and expensive water system, in week one stopped working and I got a mouth full of salt water. Not a good start. This was in the evening and I called right away, Corey called me back within 15 minutes to troubleshoot. The team at Advanced Radon was out to my house the next day and would not leave until they figured it out. It's been perfect since then and the service was great. I mean being able to get drinking water from every faucet in the house is amazing. Next let's chat about the radon in the air... Yup I had them fix that too but once again there was an issue and the test showed it wasn't full remediated to an acceptable standard. Well here they come again and spent several hours fixing the issue, at no cost to me, and now my radon levels are well under the limits. Corey and his team are not only professional and great at what they do, we had a few laughs along the way. Thanks so much to Advance Radon and if you are concerned about your water give them a call.
Tech showed up on time, was clear about his findings, and was able to give me an idea of next steps.
Great company to work with.
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1 change recorded — last scanned Sep 2, 2026.