Dust springs from almost every corner of life. Matter that disintegrates eventually reduces to the particles that end up in dust, which can then become airborne. Many common allergens find their way into household dust, including:

• Molds
• Cockroach debris
• Dead dust mite debris
• Tobacco smoke and its toxic byproducts
• Fibers
• Food particles
• Pollens
• Plant and insect parts
• Hair, animal fur and feathers
• Dried pet saliva or urine
• Flakes of human skin and animal dander

Dust mites are microorganisms that thrive in settings where moisture and dust are abundant. In the United States, dust mite populations tend to peak in the warm, humid weather months. However, their fecal allergens remain present at high levels for months afterward, into early winter and beyond. Dust mites tend to congregate in the following areas:

• Mattresses and box springs
• Drapes and curtains
• Bed sheets, comforters, canopies and ruffles
• Clothing
• Upholstered furniture