Each week, we highlight some of the best stories brought into the world by the Freedom of Information Act. See some we missed? Please let us know!

In this week’s FOIA round-up, public records requests reveal pollution from U.S. mining sites is contaminating American water supplies without being treated, researchers use FOIA documents to reveal mishandling of fentanyl distribution by the Federal Drug Administration, and new records raise ethical concerns over travel expenses of senior advisor to Veterans Affairs Secretary Robert Wilkie.