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Illinois Department of Public Health Guidelines for Indoor Air Quality


IAQ Questionnaire

IAQ Occupant Diary


EPA Indoor Air Quality website

Indoor Air Quality

Illinois State University is committed to providing faculty, staff, and students with a work environment free of recognized hazards. Reports of poor indoor air quality (IAQ) are investigated by Environmental Health and Safety on a case-by-case basis. Due to variations in individual sensitivities and scientific limitations, the source of IAQ complaints and respective remediation measures may not always be identified when complaints are reported and thoroughly investigated.  Environmental Health and Safety and Facilities Management work together to address indoor air quality concerns across campus.

Due to the lack of IAQ regulations, common practices rather than standards are used to recognize, evaluate, and control poor indoor air quality sources. Environmental Health and Safety refers to recommendations by Illinois Department of Public Health (IDPH), Environmental Protection Agency (EPA), American Conference of Governmental Industrial Hygienists (ACGIH), American Industrial Hygiene Association (AIHA), and the American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE).

Four factors that influence IAQ are occupants, HVAC systems, possible pollutant pathways, and possible contaminant sources.  Concerns over IAQ may be a result of mold and water damaged building materials, temperature and humidity issues, dust and airborne particulates, Radon, Carbon monoxide, Carbon dioxide, volatile organic compounds, Formaldehyde, Hydrogen sulfide (sewer gas), Nitrogen dioxide, Ozone, and odors.

Initial IAQ inspections include, but are not limited to, the following:

  • Visual inspections of occupied areas
    • Identify probable source of contaminants (chemical use and storage, work activities, housekeeping, recent renovations, water intrusion, etc.)
  • Inspection of HVAC systems
    • Measure percentage of fresh air being supplied to the occupied area, location of outdoor air intakes, ventilation rates, and HVAC operation/maintenance
  • Temperature and relative humidity measurement
  • Carbon Monoxide, Carbon Dioxide, and Oxygen measurement

If poor indoor air quality is suspected or confirmed upon an initial investigation, EHS may conduct more intensive investigation techniques, including chemical contaminant monitoring, bio-aerosol monitoring, HVAC evaluations, and specific IAQ contaminant monitoring. Unfortunately, there are limitations to conducting IAQ investigations. Individual sensitivities may cause occupants to experience discomfort at contaminant levels far below standards for occupational exposure. Also, mold sampling is limited due to a lack of regulatory standards (affected by individual sensitivities) and can be found in virtually all environments.

Environmental Health and Safety is currently working on developing an Indoor Air Quality Policy that will be used to address IAQ investigations, IAQ reports and remedial measures, and the prevention of IAQ problems.

External Resources

2014-10-02T09:29:47.211-05:00 2014