When you suspect hidden mold but can't see it, mold air sampling uses a specialized pump to pull a measured volume of air through a spore trap, collecting particles onto a sticky slide or culture plate. A lab later counts and identifies the genera present—like Aspergillus or Cladosporium—so you can compare indoor levels to outdoor baselines. This test pinpoints whether airborne spores are elevated, helping you decide if remediation or further moisture investigation is needed. mold air sampling 38