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LOGO: Occupational Hearing Loss Surveillance


In the United States, hearing loss is the third-most common chronic health condition among older adults, with over 11% of the entire population affected. Approximately 24% of cases of hearing difficulty are caused by occupational exposures. Occupational Hearing Loss (OHL) can occur when workers are exposed to loud noise (noise-induced hearing loss), or ototoxic chemicals such as heavy metals, organic solvents and asphyxiants. About 22 million workers are exposed to hazardous noise each year, and 18% of these workers have hearing loss. The NIOSH OHL Surveillance Project commenced in 2009 to establish a national repository for OHL data, and to conduct surveillance and research of this common occupational illness. More information about the OHL Surveillance Project.

To obtain additional information on the NIOSH OHL Surveillance Project, please send an e-mail to

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