The article discusses the major provisions of hexavalent chromium Cr(VI) standards issued by the U.S. Occupational Safety and Health Administration (OSHA). It explores the nature of Cr(VI) in welding fumes and describes various welding processes, including shielded metal arc welding (SMAW), gas metal arc welding (GMAW) and gas tungsten arc welding (GTAW), as well as their relative fume generation rates (FGRs). It also cites some factors to consider in assessing potential exposures to Cr(VI).