Verified record
May Indoor Air Investigations is a Tyngsborough, MA consultancy that, by its own description, performs mold inspections and testing, odor and VOC testing, moisture and leak investigations, and dust-sample microscopy analysis. Its website says it was founded by Jeffrey C. May, principal scientist, and that Connie L. May is co-business owner and office manager. On HomeAdvisor it shows 4.9 stars from 52 ratings. A recent Google customer who was in a panic about mold test results said Jeff explained what they were dealing with and how to mitigate it. A 2025 Google customer said Jeff did not sell remediation, and that he reviewed their entire home, took samples and photos, and wrote a report detailing what did and did not need to be done. A 2025 customer said Jeff and Connie May spent an entire day at the house, took air quality samples and physical samples, and sent a detailed report with photos within 3 days. That 2025 customer said they were at first hesitant about the price but called it a bargain. A 2017 customer said Jeff spent 4 hours investigating the home for a flat fee and walked them through the house explaining his findings. A 2017 customer said Jeff found several kinds of mold spores coming out of the vent of the central a.c. system and low mold growth in the basement carpet. A 2016 customer said he also found a gas leak. A 2015 customer said he used a moisture meter and infrared camera to find very wet bricks extending in a line to the ceiling of a basement stairwell. A 2021 customer said he was not cheap.
Jeff is so knowledgeable. I was in a panic about the mold test results I had done (and AI was not helpful). He explained what I was dealing with, how to mitigate it, and answered all my questions. I highly recommend him!
Our contractor recommended Jeff after confirming for me that many mold remediation companies are selling fish oil. I’m allergic to mold and needed a plan for our new home, but was worried about being taken advantage of. Jeff doesn’t sell remediation. He came in, did a thorough and incredibly thoughtful review of our entire home, took samples and photos, and wrote a comprehensive report with incredibly helpful details about exactly what does and doesn’t need to be done. We feel empowered that we know what needs to be done and no one is profiting from upselling us. Thanks, Jeff!
We recently hired Jeff and Connie May of May Indoor Investigations to help us identify environmental factors in our house that might be contributing to health concerns. Knowing absolutely nothing about this field, we had no idea where to turn for reliable help. However, the Mays came highly recommended and we are glad we chose them to do the evaluation. Jeff and Connie spent an entire day at our house. We were privy to observing their work throughout their visit. They were extremely thorough in their investigation, walking around the exterior of our house and then through every interior room. They took air quality samples as well as physical samples back to be analyzed. Within an amazingly short turn around time (3 days) we were sent a detailed report including photos that outlined not only the problem areas, but included specifics for amelioration. Jeff May was clear in his communications with us and has been made himself available when we’ve had further questions. When asked, he made specific recommendations as to beneficial products and also gave us lists of recommended companies for remediation work. While we were at first hesitant about the price (never having done anything like this before), we can say any without hesitation that May Indoor Air Quality was a bargain for all that they did. Highly, highly recommend.
If it would be possible I could give more than 5 stars. Jeff and Connie are very nice people and incredibly knowlegable specialists. They went above and beyond, conducting inspection of our house. I invited them because of presence of mold and odors. The house was thoroughly inspected not only for those problems we concerned of, but for all other possible hazards. Jeff and Connie spent as much time at our house as it was needed to complete all the aspects of required inspection. Each room, even every little space, furnace, AC unit, stove, refrigerator were inspected. Shortly after appointment I got detailed reports with photos and multiple very helpful recommendations. Now we know what exactly should be done in the house and outside in order to eliminate negative issues found by Jeff who is an expert in all aspects, related to different systems of house. Jeff and Connie are very kind and intelligent people. It was a real pleasure to spend several hours with them at our house. This appointment was life-changing for us. I highly recommend May Idoor Air Inspections to all who would like to make sure that environment of living places is safe.
Jeff kindly responds to questions from other home inspectors. His newsletter is also quite helpful.
Specializes in
Also offers
Service area
2 changes recorded — last scanned Sep 30, 2026.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from May Indoor Air Investigations. Use it to sanity-check bids, then get the real number in writing.
Firms price in size tiers, not per foot — pick the bracket.
Estimated range
$530 – $760
Typical inspection around $650
Languages
Languages
A guided tour of the house, not a checklist5.0
Reroof and vinyl siding jobs on record3.5
