QPCR (quantitative polymerase chain reaction) is a laboratory method that identifies and measures mold DNA in a sample, rather than relying on visual identification alone. It is commonly used in mold testing because it can detect and identify mold species even when spore counts are low, and results are typically more precise than traditional culturing or direct microscopy for naming specific species.
How It’s Used
A QPCR panel—such as EPA’s ERMI (Environmental Relative Moldiness Index) or a targeted species panel—can be run on dust or air samples collected during an inspection. It is especially useful when a visual inspection is inconclusive, or when you need a precise, lab-documented species breakdown rather than a general spore count.
How It Differs From Air Sampling
Traditional air sampling captures a snapshot of what is in the air at the moment of testing. QPCR dust sampling can reflect a longer history of mold presence in a space, because dust accumulates over time. Healthy Home Dallas will recommend the method—or combination of methods—that best fits your situation.