Look for visible dark green, black, or gray patches on walls, ceilings, floors, or around windows
Check for a musty, earthy, or damp smell
Notice any recent or ongoing water leaks, flooding, or condensation
Watch for peeling paint, bubbling wallpaper, or water stains
Inspect areas with high moisture such as bathrooms, basements, attics, and under sinks
Check HVAC vents, drip pans, and air conditioners for mold growth
Look for mold on drywall, wood, carpet, or insulation
Notice worsening allergy-like symptoms indoors, such as sneezing, coughing, or watery eyes
Check whether symptoms improve when you leave the building
Use a home mold test kit if you want a basic screening
Hire a professional mold inspector for a more reliable assessment
Get testing if the affected area is large or hidden behind walls
Assume any mold from water damage should be treated seriously
Contact a professional if you suspect toxic mold or extensive contamination