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Health Hazard Evaluations (HHEs)

Each month we will update this page to highlight newly released final reports and information on new and emerging hazards we are evaluating. Check back often to see what we are up to!

What's New

  • Recommendations Provided to an Electrical Supply Company
    Although the electrical supply company had begun implementing safety programs, investigators noted improper storage of chemicals, inadequate exhaust and ventilation systems, and they were concerned that employees took home soldering work. Recommendations included compliance with OSHA Hazard Communication requirements, improving ventilation, and ending take-home work. To read the full report go to
  • Evaluation of Indoor Environmental Quality in a Public Elementary School
    HHE Program investigators identified problems with the school's ventilation system, but they found no widespread mold or water damage. Concerns about mold exposure were largely triggered by inappropriate medical testing. Recommendations included renovating the ventilation system and stopping blood and urine tests for mold and toxins. To read the full report go to
  • 2014 Health Hazard Evaluation Program Annual Report
    The NIOSH Health Hazard Evaluation (HHE) Program is pleased to share its 2014 annual report with you! Our report includes summaries of projects that were interesting and other highlights of our year. We hope the report stimulates conversations about who the HHE Program is and how we make a difference for the health and safety of employees throughout the United States.
    A link to the annual report is available at PDF file
  • NIOSH Health Hazard Evaluation Program Noise Measurement Database
    We have released a database to provide researchers and other interested stakeholders with noise measurement results collected during HHE surveys from 1996–2012. The noise database contains workplace noise measurement results from 73 HHE reports, including over 761 personal noise exposure measurements and 536 area noise measurements. For reports posted online, the database provides a direct link to the HHE report for each of the noise measurement results. This database is an ongoing project and will be updated at least yearly to add the most recent HHE noise measurement data. To view the database go to