Conversation so far:
when was the safe drinking water act enacted
The Safe Drinking Water Act was enacted by the 93rd United States Congress, effective December 16, 1974.
what is the purpose of the safe drinking water act
The Safe Drinking Water Act (SDWA) is the principal federal law in the United States intended to ensure safe drinking water for the public.

Question: how is the water regulated
Self-contained rewrite: how is the water regulated under the safe drinking water act