Major field experiment programmes from 1957 projected to 1987 on the disposal of low-level and high-level radioactive waste in salt formations, are briefly described. They include the USA and Germany (Asse salt mine). In 1987 an experiment at the last-named will involve the introduction of 30 vitrified blocks of high-level radwaste with a disposal time of five years. They will contain 7 M Ci137Cs and 3 M Ci90Sr. This experiment will also examine gas production by radiolysis. Dispersal of radwaste into salt formations can be realized and long-term safety proved.-R.K.H.