Perry Gottesfeld is the Executive Director of Occupational Knowledge International, a San Francisco-based nonprofit organization working in developing countries to build capacity around occupational and environmental health.
Although U.S. OSHA updated its occupational silica standard in 2016 for the first time in 45 years, relatively few countries have followed suit. Aside from a handful of European countries, some Canadian Provinces and Mexico, most other countries do not have as stringent of a standard as the current U.S. Permissible Exposure Limit of 0.05 mg/m^3.
