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Health Hazard Evaluations (HHEs)

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All NIOSH Health Hazard Evaluation reports and other NIOSH publications are available at no cost. You can either download a copy of the publication from the website or contact us for a copy. For HHE reports, please send an email to HHERequestHelp@cdc.gov. Information about all other NIOSH publications is available at https://www.cdc.gov/niosh/pubs/.

We carefully review our reports prior to publication, but we do make errors from time to time. We regret any typographical or other minor errors that you might find. If you find a substantive factual or data-related error, let us know. Please send an email to HHERequestHelp@cdc.gov with the report number (ex. HHE 2013-0500-7500), the authors' names, the error you are reporting, and the page number of the error. We will look into your comments, fix confirmed errors, and repost the report. Thank you for your interest in the HHE Program.

HHE Search Results

1053 HHE reports were found based on your search terms. Reports are listed in order of year published with the most recently published reports listed first.


Year Published and Title

(2021) Coccidioides exposure and coccidioidomycosis infections among warehouse and distribution employees. (Click to open report)
The Health Hazard Evaluation Program received a request from management of a warehouse and distribution facility concerned about the potential for work-related coccidioidomycosis, also known as Valley fever or "cocci." Several employees developed coccidioidomycosis in recent years. The warehouse and distribution facility consisted of multiple buildings on several hundred acres mostly surrounded by farmland. We interviewed employees about work characteristics, time spent outdoors at and outside o... (Click to show more)

(2021) Exposure to lead during residential water line replacement activities. (Click to open report)
The Health Hazard Evaluation (HHE) Program received a request from the employer of a city water department concerning lead exposure among crews replacing lead water lines servicing residential homes. This occurred after two employees received blood tests indicating elevated lead levels. In response to these findings, the employer implemented some measures to minimize lead exposures among employees and submitted an HHE request. In response to this request, we conducted confidential medical interv... (Click to show more)

(2021) Exposures to metals and a perceived excess of cancer cases in a train maintenance facility. (Click to open report)
The Health Hazard Evaluation Program received a request from a union at a train maintenance facility concerning employee exposure to metals and a perceived excess of cancer. We visited the facility twice and focused our evaluation on first shift employees working in six shops (truck, wheel, motor, electronics, contactor, and tin) that worked on different maintenance and repair tasks. We observed work processes, work practices, and conditions; spoke informally to employees in each shop about heal... (Click to show more)

(2020) Exposures and health concerns in a dental clinic. (Click to open report)
Request: We received a management request for a health hazard evaluation at a dental clinic. The request stated concerns about possible exposure to mercury vapors from amalgam, a metal alloy used for dental fillings. Workplace: The dental clinic provides dental care services to patients. Services include general dentistry, family dentistry, cosmetic dentistry, restorative dentistry, full-mouth reconstruction, and oral surgery services. At the time of our survey, the clinic employed 17 staff, inc... (Click to show more)

(2020) Exposures and respiratory health at a coffee roasting, flavoring, and packaging facility. (Click to open report)
Physicians at a university medical center diagnosed obliterative bronchiolitis, a serious, often disabling lung disease, in five former employees of the coffee roasting, flavoring, and packaging facility. In April 2012, the National Institute for Occupational Safety and Health's Health Hazard Evaluation Program received a confidential employee request from a coffee roasting, flavoring, and packaging facility with approximately 85 employees. The requestors had concerns about respiratory symptoms,... (Click to show more)

(2020) Exposures at a coffee roasting, flavoring, and packaging facility. (Click to open report)
The Health Hazard Evaluation Program of the National Institute for Occupational Safety and Health received a request from management at a coffee roasting, flavoring, and packaging facility regarding concerns about potential health effects from exposure to diacetyl, 2,3-pentanedione, and other alpha-diketones during coffee roasting, grinding, and flavoring of coffee. In April 2019, we conducted an industrial hygiene survey at the facility. The industrial hygiene survey consisted of the collection... (Click to show more)

(2020) Silica exposures during dowel drilling. (Click to open report)
Management from a dowel drilling company requested a NIOSH health hazard evaluation (HHE) concerning employee exposure to respirable crystalline silica during dowel drilling activities. Dowel drilling is one step in the process of repairing a road. The work on this HHE took place on a state road construction site. During our visit, we observed work processes and work practices, estimated the amount of water used to control dust, collected air samples for respirable crystalline silica and respira... (Click to show more)

(2019) Ergonomics, dust, and unanticipated hazards at a donation and retail store. (Click to open report)
The Health Hazard Evaluation Program received a request from employees of a donation and retail store. They were concerned about ergonomics and exposures to dust and unanticipated hazards, such as needles, other sharp items, and feces- or urine-soiled items. Our evaluation included reviewing documents on new employee health and safety training, injury reports, and health and safety meeting topics; observing work processes, practices, and conditions; reviewing personal protective equipment (PPE) ... (Click to show more)

(2019) Exposures and respiratory health at a coffee roasting and packaging facility and two off-site retail cafés. (Click to open report)
In March 2016, the National Institute for Occupational Safety and Health's Health Hazard Evaluation Program received a request from the owner of a coffee roasting and packaging facility and off-site retail cafés with 15 employees regarding concerns about exposures to and health effects from diacetyl and 2,3-pentanedione during coffee roasting, coffee grinding, and café tasks. In May 2017, we conducted the medical survey, industrial hygiene survey, and ventilation assessment at the roastery produ... (Click to show more)

(2019) Exposures and respiratory health at a coffee roasting and packaging facility. (Click to open report)
In May 2016, the National Institute for Occupational Safety and Health's (NIOSH) Health Hazard Evaluation Program received a request from management of a coffee roasting and packaging facility regarding concerns about exposures to and health effects from diacetyl and 2,3-pentanedione during coffee roasting, grinding, and flavoring. In July 2016, we conducted an industrial hygiene survey and ventilation assessment at the facility. The industrial hygiene survey consisted of collection of air sampl... (Click to show more)


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