Skip directly to search Skip directly to A to Z list Skip directly to navigation Skip directly to page options Skip directly to site content

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

  • 2015 Health Hazard Evaluation Program Annual Report
    The NIOSH Health Hazard Evaluation (HHE) Program is pleased to share its 2015 annual report. 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 here:
  • Evaluation of Noise, Hearing Loss, and Whole Body Vibration at a Hammer Forge Company
    At the hammers, HHE Program investigators found impact noise levels up to 148 decibels and noise exposures above 100 decibels, A-weighted. Most employees' noise exposures were above exposure limits. Many employees had hearing loss. We found whole body vibration and hand-arm vibration could meet or exceed recommended limits. To read the full report go to
  • Silica Recommendations Provided to a Natural and Engineered Stone Countertop Fabricator
    Although the company used wet methods to control dust, HHE Program investigators found overexposures to respirable crystalline silica. Exposures were highest for employees using pneumatic wet grinders with diamond cup wheels. We recommended the company use engineering controls to decrease exposures and establish a medical surveillance program. To read the full report go to