The most common origins of IAQ problems arise from a variety of sources inside and outside the building. Potential sources of contaminants in campus buildings include dust, cleaning supplies, pesticides, building materials, furnishings, occupant respiration and perspiration, and cosmetics. Serious IAQ problems occur when contaminant concentrations become excessive. Dusty surfaces, stagnant water and damp materials provide an environment ripe for microbial growth. The best method to control indoor air contaminants depends on the source or sources causing the concerns.
Source control is generally the most effective solution to the problem.
Modification of the ventilation system may also be an effective method.