https://en.wikipedia.org/wiki/Lead_and_Copper_Rule

EPA published the Lead and Copper Rule Minor Revisions (LCRMR) in January 2000. This rule required water suppliers to install the best available corrosion control mechanisms and to continually observe water levels, even if corrosion control was implemented.

May I also refer you to 2011 study that stated Flint river water would require anticorrosion b4 safe to use as drinking water (google it).

Sigh. Maybe its not your intention but it sounds like you're trying to let the criminally negligent perps off the hook

Id certianly agree that infrastructure of all types need updating but you know what .... t he radical RW and their disaster capitalist cronies don't seem to be the least bit interested in replacing old lead pipes in old urban rust belt cities. How do you propose working around that?

decided they didn't need to follow the fed regulations re: adding anti-corrosion agents to the water supply.

LOTS of other cities have old lead piping without people dying and suffering permanent impairments because of it.

Someone decided they didn't need to follow no stinkin water regulations. THAT should be the person(s) who get fired.

Not some low level paper shuffler.