Indoor air quality testing is one of those services that sounds straightforward until you’re actually looking at a report full of measurements, thresholds, and abbreviations you’ve never seen before. We want to help make sense of it. Whether you’re a homeowner in Detroit, MI who suspects a moisture problem, or a property manager in Southfield, MI trying to understand what’s floating around in the air your tenants breathe, knowing what this testing actually measures, and what the results are telling you, makes the whole process a lot less stressful.
What Air Quality Testing Is Actually Looking For
When our IICRC-certified technicians conduct indoor air quality testing, we’re not just taking a single snapshot of the air. We’re looking at a range of potential contaminants and conditions that, on their own or together, can affect how healthy and comfortable a space is to live or work in.
Some of the most common things we measure include:
- Mold spores — both surface samples and airborne spore counts, compared against an outdoor baseline reading taken at the same time
- Particulate matter — tiny particles suspended in the air that can irritate the lungs
- Volatile organic compounds (VOCs) — gases that off-gas from building materials, cleaning products, paints, and adhesives
- Carbon dioxide and carbon monoxide levels — indicators of ventilation quality and potential combustion issues
- Humidity and moisture readings — because high relative humidity is one of the biggest drivers of mold growth and poor air quality
Each of these tells a different story. Elevated mold spore counts, for example, point toward a moisture source somewhere in the building. High VOC readings might suggest inadequate ventilation or recently introduced materials. Carbon dioxide levels that creep up over the course of a workday in a commercial building in Sterling Heights, MI typically signal that fresh air exchange is insufficient.
How the Results Are Interpreted
This is where a lot of people get confused, and understandably so. A number by itself doesn’t mean much. Context is everything.
For mold, we compare the indoor spore count to the outdoor sample taken on the same visit. If the indoor count is significantly higher than what’s naturally present outside, that’s a red flag. If the types of mold found indoors are different from what’s in the outdoor sample, that’s another indicator that something is actively growing inside the building. Homes in older neighborhoods in Oak Park, MI and Birmingham, MI often have conditions like aging building envelopes or basement moisture that can skew these results.
Humidity readings are interpreted against established comfort and safety thresholds. Generally speaking, indoor relative humidity between about 30 and 50 percent is considered healthy. Readings that regularly push above that range, especially in a crawl space or basement, create conditions where mold can take hold and air quality throughout the home can suffer. That’s one reason we pair air quality testing with services like crawl space encapsulation and air sealing so often. Addressing the source matters just as much as identifying the problem.
VOC results are compared against established guidelines. Some level of VOCs is present in nearly every indoor environment, so the question is whether concentrations are elevated enough to be a concern and, if so, what the likely source is.
What Happens After Testing
A good air quality report should never leave you with more questions than answers. After we complete testing for clients in Novi, MI and across the surrounding communities in Wayne, Oakland, Washtenaw, and Macomb counties, we walk through the findings in plain language. If mold spores are elevated, we explain what that means for the space and what remediation or prevention steps make sense. If humidity is the culprit, we talk about solutions like encapsulation or improved ventilation. If VOC levels are a concern, we help trace possible sources.
The goal isn’t just to hand over a document. It’s to give you something actionable. And because we’re available 24 hours a day, seven days a week, if something in the results feels urgent, we’re not going to leave you waiting.
Air quality concerns can feel overwhelming, especially when you don’t know what you’re looking at. If you have questions about what indoor air quality testing involves or what your results might mean, please give us a call or drop us an email. We’re happy to talk it through with you.