The risk phenomena related to the salt exploitation at Ocna Mureş town. Mining exploitation in salt soluble ores have a different peculiarity in comparison to other, due to solubility of this in fresh water. In time being, in Ocna Mureş town, as a consequence of exploitation anthropic activities and of carstic phenomena, developed on salt a series of risk phenomena were triggered, with direct implication in social, economical and environmental status.