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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

69 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

(2016) Health hazard evaluation report: evaluation of indoor air quality concerns at an outpatient medical clinic in a shared-use building - West Virginia. (Click to open report)
NIOSH received a management request to conduct a health hazard evaluation at an outpatient medical clinic in West Virginia. The request cited concerns about indoor air quality in the building. Clinic employees reported nausea, headache, dizziness, confusion, fatigue, burning eyes, numbness of hands and fingers, tingling around lips, metallic taste, itching, and reduced work productivity. We held voluntary confidential interviews with individual employees who wished to discuss their symptoms and ... (Click to show more)

(2016) Health hazard evaluation report: evaluation of indoor environmental quality and health concerns in a juvenile court building. (Click to open report)
The employer at a juvenile court and detention building requested help in evaluating exposure to raw sewage, leaks from an underground diesel storage tank, and mold. We evaluated these concerns and measured carbon dioxide, temperature, relative humidity, and ventilation airflow. We saw no evidence of a current mold or sewage problem in the building. The underground diesel storage tank was inspected and maintained. However, we identified several correctable problems including inadequate building ... (Click to show more)

(2016) Health hazard evaluation report: evaluation of indoor environmental quality and health concerns in a public university. (Click to open report)
University managers requested help to address employee concerns about mold in a campus building. We evaluated the building ventilation systems. We checked for moisture, water damage, and mold. We measured carbon dioxide, temperature, and relative humidity. We saw no widespread mold or water damage. Relative humidity levels in some areas were above 65%. These levels can help microorganisms and dust mites grow. The building had unit ventilators and window air-conditioners, not a central ventilatio... (Click to show more)

(2016) Health hazard evaluation report: evaluation of odors and surface residues in a medical research facility. (Click to open report)
Medical center employees requested a health hazard evaluation. They were concerned about indoor environmental quality, odors, and a residue on top of shelves. Employees felt that odors were causing nausea, headache, sinus problems, and aggravation of asthma. We evaluated the ventilation system. We collected air samples in the building and on the roof, and bulk samples of residue from shelves in some laboratories. We found supply air intakes on the roof pulling building exhaust air into the build... (Click to show more)

(2016) Health hazard evaluation report: evaluation of respiratory and indoor environmental quality concerns at a snack foods facility - Pennsylvania. (Click to open report)
In December 2013, the National Institute for Occupational Safety and Health received a confidential health hazard evaluation request from employees at a snack foods manufacturing facility in Pennsylvania. The request listed concerns about respiratory illnesses, headaches, nosebleeds, and cancer related to indoor dampness and potential exposure to mold and mildew, seasonings, and asbestos. We evaluated employee health concerns and potential exposures to mold and mildew, seasonings, flavoring chem... (Click to show more)

(2015) Health hazard evaluation report: evaluation of an unpleasant odor at an aircraft ejection seat manufacturer. (Click to open report)
The Health Hazard Evaluation Program received a request from the employer at an ejection seat manufacturing facility. Employees were concerned about an odor in the facility and health symptoms thought to be related to it. The odor reportedly permeated and remained in materials and goods of employees for weeks after they left the facility. Some employees described the odor as a musty smell and others as a chemical smell. In this facility, stock aluminum is cut and machined into smaller parts in f... (Click to show more)

(2015) Health hazard evaluation report: evaluation of indoor environmental quality and health concerns in a public elementary school. (Click to open report)
The Health Hazard Evaluation Program received a request from a union representing employees at an elementary school because of concerns about possible exposure to mold in the school building. In 2014, some elementary school employees went on medical leave reportedly because of illness from mold exposure after receiving results from fungal immunoglobulin G (IgG) blood tests and urine mycotoxin tests. Knowledge of these results prompted over 20 additional school employees to have their blood teste... (Click to show more)

(2015) Health hazard evaluation report: evaluation of indoor environmental quality in police evidence intake, processing, and storage areas at a medical examiner's office. (Click to open report)
The Health Hazard Evaluation Program received a request from employees in a medical examiner's office building. Employees in the police evidence intake, processing, and storage areas were concerned about inadequate ventilation. We visited in March 2015 to evaluate the areas of concern on the subbasement 1 and fifth floors. We measured temperature, relative humidity, carbon monoxide, and carbon dioxide; visually assessed the building's heating, ventilating, and air-conditioning systems; measured ... (Click to show more)

(2014) Health hazard evaluation report: evaluation of indoor environmental quality in a medical office building. (Click to open report)
The Health Hazard Evaluation Program received a request from employees at a medical office building. They were concerned about indoor environmental quality and exposure to sewer gas, specifically hydrogen sulfide. The medical office building was a four-story, concrete masonry office building constructed in the 1960s that had been renovated twice; the three main floors were converted into offices and exam rooms. The building was surrounded by manholes that had been identified as sources of odors.... (Click to show more)

(2014) Health hazard evaluation report: evaluation of indoor environmental quality in a natural history building. (Click to open report)
The Health Hazard Evaluation Program received a request from a university health and safety office to evaluate employees' concerns about rashes, sore throat, and respiratory irritation when working on the seventh floor of a natural history building. This floor housed offices, computer workstations, and ornithology, mammology, and icthyology departments. Hundreds of bird and mammal specimens were stored in unventilated cabinets specially designed to minimize internal temperature and relative humi... (Click to show more)


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