Hosted by the U.S. Department for Health and Human Services, Heathdata.gov "is dedicated to making high value health data more accessible to entrepreneurs, researchers, and policy makers in the hopes of better health outcomes for all."
OSHA has statistics on workplace injury, illness and fatalities. It also provides establishment-level stats on inspections and investigations. The latter is a good place to find out whether an establishment is unionized. See the A to Z guide for statistics.
