What is a source of odor associated with mold?

Mold produces a characteristic odor primarily due to the release of microbial volatile organic compounds, commonly known as MVOCs. These compounds are organic chemicals that can evaporate into the air and are emitted by mold as it grows and metabolizes organic material. The presence of MVOCs is often an indicator of mold activity and can lead to noticeable odors typically described as musty or earthy.

This source of odor is tied closely to the biological processes of mold, as different species of mold produce varying types and concentrations of MVOCs, which can intensify in damp environments conducive to mold growth. Recognizing the odor associated with mold growth is essential for mold assessors and remediation professionals, as it can serve as a key indicator of underlying moisture problems and potential mold infestations that need to be addressed.