This article seems to focus on New Jersey but there was one in Ottawa Illinois. In the 70s and 80s there was a clean-up effort that would work until the state ran out of money each year then continue the next. I remember seeing monitors in news/documentaries following storm drains from the plant. I assume it has been cleaned up some time ago. Argonne national lab did periodic body counts on the women to track dose and gather information.
How the Radium Girls Forced Workplace Safety Reforms
https://www.history.com/articles/radium-girls-workplace-safety