Indoor Air Quality ( IAQ) pollutants:

Pollutants can be derived from indoor and outdoor sources. Some of the most common indoor contaminants are:

Bio-aerosols - organisms, such as mold, fungi, bacteria, and viruses that can move around the building with air currents. Which can cause common cold, flu and meningitis.

Particulates - Include skin flakes, droppings, and parts  from human, insects, rodents, or other pests, dust mites, and fecal matter and inert airborne matter such as dusts, asbestos, silica, human skin pieces, and related materials. these are often collectively terms " particulates"

Inorganic chemicals - can include ammonia or chlorine bleach found in some cleaning products. Overuse or improper mixing of cleaning products near occupied areas can result in toxic gasses, such as chlorine gas. Hydrogen sulfide, which has "rotten egg " odor and can be produces when sewers malfunction, is toxic at elevated levels.

Cleaning services - Insufficient cleaning of kitchens, restrooms, and water drain pans, leaving nutrients for microbes and pests. leaving food waste overnight, which can attract pests. Dusting, sweeping and vacuuming techniques that release more dust than they clean. Improper storage and use scented products and harsh cleaners that release VOC's , respiratory irritants and other toxicants into the air.are all indoor air pollutants.

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