Diagnosed infection or clusters of serious health problems

Notes: May be Legionnaire's disease or histoplasmosis, related bacteria or fungi found in the building or near outdoor intakes. Contact your local or State Health Department for guidance.

Possible Contaminants:

• Biological
  • Is there an odor of mold or mildew in or near the complaint area?
  • Is there mold or any animals present?
  • Is there standing water near the complaint area, or instide the air handler or ductwork?
  • Is condensation often present on windows or cold surfaces?
  • Is indoor relative humidity above 60%?
  • Excess moisture can cause mold, fungi, dust mites, and some bacteria to flourish.
• Air Handling Unit
  • Is the system turned on?
  • Is air flowing from the vents?
  • Is the fan operating?
  • Are the filters clean and properly installed?
  • Are the dampers operating properly?
  • Is there moisture, debris, or microbial growth in or near the unit?
  • Is the drain pan clean and draining?
  • Are the coils clean?
  • Is combustion equipment properly vented, no flue leaks or backdrafting?