Two laws passed to prevent or decrease water pollution were the clean water act and the safe drinking water act water safety act water pollution act clean air act

The given blank can be filled with Safe Drinking Water Act.

Explanation:

The two laws enacted in order to decrease or inhibit pollution of water were the Clean Water Act and the Safe Drinking Water Act. The Clean Water Act is a law in the United States that monitors the release of contaminants into the surface water of the country like wetlands, rivers, lakes, coastal regions and streams.  

On the other hand, the Safe Drinking Water Act refers to a federal law, which safeguards the quality of drinking water in the United States, and the supplies of drinking water all through the country.

your answer is "the 1950's"

that is true   : ) hope this you