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Molds and mold spores can be found almost anywhere, both indoors and outdoors. They are a ubiquitous, natural part of our environment. However, when excessive moisture is present in buildings or on building materials, mold growth can occur indoors.

It is not possible to completely eliminate mold and mold spores in the indoor environment. However, indoor mold growth can and should be prevented or controlled by controlling moisture, responding promptly to water leaks and providing adequate ventilation.

Here are some helpful resources on mold in the indoor environment:

General Information and Guidance

American Industrial Hygiene Association (AIHA)

American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE)

  • ANSI/ASHRAE Standard 62.1- Latest Version - Ventilation for Acceptable Indoor Air Quality
  • ANSI/ASHRAE Standard 55-Latest Version - Thermal Environmental Conditions for Human Occupancy
  • ANSI/ASHRAE Standard 62.2-Latest Version - Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings
  • ASHRAE Technical FAQs – IAQ

Centers for Disease Control and Prevention (CDC)

Environmental Protection Agency (EPA)

National Toxicology Program (NTP)

Navy & Marine Corps Public Health Center

Occupational Safety and Health Administration (OSHA)


American Academy of Allergy Asthma and Immunology (AAAAI)

Environmental Protection Agency Clinician Guidance

Institute of Medicine (IOM)

University of Connecticut Health Center

World Health Organization (WHO)

State Resources

Laboratory Accreditation Information

American Industrial Hygiene Association (AIHA)

Mold Cleaning and Remediation Guidance

Cleanup and Mold Prevention

Duct Cleaning

What You Can Do to Reduce Exposure to Allergens

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