The REHS/RS Study Guide is the premier NEHA credential available to a wide range of environmental health professionals. Individuals holding the REHS/RS credential show competency in a wide range of environmental health issues and serve to prevent illness, injury, and death. Additionally, they work to improve the quality of life in local communities and to prepare their communities to respond to and recover from disasters including terrorism events, acts of nature, and pandemics. This REHS/RS Study Guide includes practice exam questions and resource lists specific to different content areas and will help potential test takers of the credentialing exam identify their areas of strength and areas where they will need to bolster their current content knowledge.