Coal ash is a thorium and uranium concentrate, and as you say the Department of Energy publishes the release statistics. They aren't too difficult to find. Each

Coal ash is a thorium and uranium concentrate, and as you say the Department of Energy publishes the release statistics. They aren't too difficult to find. Each year in the US, we release more than a thousand tons of thorium and uranium into the environment via coal ash dumping, with limited controls. There have also been population health studies in communities that live adjacent to where coal ash is dumped in the US. As I recall, it is correlated with a small but detectable (around 1% IIRC) increase in cancer incidence rates relative to local control populations, and largely attributed to the thorium component of the waste.