Health News Reviews Toolkit - lots of tips to better evaluate claims about healthcare interventions (straight forward writing for a non-specialist audience)
Agency for Toxic Substance & Disease Register (ATSDR)
ATSDR serves the public by using the best science, taking responsive public health actions, and providing trusted health information to prevent harmful exposures and diseases related to toxic substances.
Integrated Risk Information System (IRIS)
A compilation of electronic reports on specific substances found in the environment and their potential to cause human health effects. The information in IRIS is intended for those without extensive training in toxicology, but with some knowledge of health sciences.
National Center for Environmental Health (NCEH)
The National Center for Environmental Health plans, directs, and coordinates a national program to maintain and improve the health of the American people by promoting a healthy environment and by preventing premature death and avoidable illness and disability caused by non-infectious, non-occupational environmental and related factors.
Occupational Safety & Health Administration (OSHA) The Occupational Safety and Health Administration aims to ensure employee safety and health in the United States by working with employers and employees to create better working environments.