The "mining contact waters" in Chile contaminate large areas of the national territory and their effects are currently permanent because they cannot be modified or recover the waters. It requires a rapid reaction of the Human Being, either prevention to modify the effects or recovery from them avoiding permanent effects. Mining contact waters produce negative effects that are not instantaneous but, they accumulate and generate a "snowball" as time passes, their existence is a danger. Likewise, there is a legal vacuum, because the " mining contact waters" require, in turn, the legal and regulatory requirements for their prevention and in the event of the existence of a special decontamination, treatment not regulated by the legislator in general or specific laws. The possible solutions oblige the State to seek prevention and decontamination when they have occurred.