Under "Current Activities" on the CCNS (Concerned Citizens for Nuclear Safety) homepage, a July 14 commemorative event re: the July 16, 1979 Church Rock uranium tailings spill commemoration is discussed, as is a July 21 commemoration of the July 16, 1945 Trinity blast.
The former happened near Gallup, New Mexico in Navajo/Diné country. The latter took place near Socorro, New Mexico.