Contact the Occupational Safety and Health Administration (OSHA) by dialing its toll-free number, (800) 321-OSHA, or by walking into a local office, notes the OSHA website. OSHA also offers an online complaint system that allows workers and others to report unsafe working conditions. The complaint system is confidential.
In addition to calling OSHA, interested parties can email OSHA using an email contact form located on its official website by clicking on the Contact Us tab on the top of the page. OSHA also accepts mail at its Washington, D.C. headquarters. Those wishing to send OSHA correspondence can write to the United States Department of Labor, Occupational Safety & Health Administration, 200 Constitution Avenue NW, Washington, D.C. 20201, notes the OSHA site as of 2015.