Answer to Question #4251 Submitted to "Ask the Experts"

I have a small amount of uranium (about 1/2 cup) that I used in the 70s in making pottery. I would like to dispose of it properly. Who will take it? Has it been a health hazard while it's been in my possession?

First and foremost, let me assure you that the uranium in your possession is not a health hazard—at least not any more than an equivalent amount of lead would be. Uranium as it occurs in nature is a weakly radioactive element whose primary health hazard comes from the fact that, like lead, it is a heavy metal and hence chemically toxic. Although uranium is weakly radioactive, it is the chemical toxicity that is of concern if uranium is taken into the body in sufficiently large quantities. Given the amount you have on hand, I don't think you have any cause for concern.

But, what to do with it???? Your best bet is to call your state public health department for advice. The folks there in the radiation control division will know exactly what you can do to dispose of the uranium. It is likely that the amount you have on hand is what is known as an exempt quantity—so small that it does not need to be licensed or given special treatment. But it is best to check with your local or state health department, especially as requirements and services vary from state to state.

Ron Kathren, CHP
Professor Emeritus
Washington State University