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Glossary of Mold Related Terms


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Indoor air pollution


IAQ indoor air quality

IAQ Coordinator

An individual at the school and/or school district level who provides leadership and coordination of IAQ activities.

IAQ Management Plan

A set of flexible and specific steps for preventing and resolving IAQ problems.


Capable of burning or causing a fire

Immune System

All internal structures and processes providing defense against disease-causing organisms such as viruses, bacteria, fungi, and parasites.

Indicator Compounds

Chemical compounds, such as carbon dioxide, whose presence at certain concentrations may be used to estimate certain building conditions (e.g., airflow, presence of sources).

Individual Risk

The increased risk for a person exposed to a specific concentration of a toxicant.

Indoor Air

The air that people breathe inside a built environment.

Indoor Air Pollutant

Particles of dust, fibers, mists, bioaerosols, and gases or vapors.

Indoor Climate

Temperature, humidity, noise, and lighting inside a structure.


Air leakage inward through cracks and interstices and through ceilings, floors, and walls of a space or building.


A protective tissue response to injury that destroys, dilutes, or walls off both the injurious agent and the injured tissue, characterized by symptoms such as pain, heat, redness, swelling, and loss of function.


Particles small enough to be inhaled, but large enough so that they are not quickly exhaled.