>>11136595Flint's a good example of how you fix a problem.. Have you looked at its status for updated or just using its past history?
The big issue for Flint is lead levels reached unacceptable levels due to older infrastructure of lead based pipes that leeched into the drinking supply. Its also now at acceptable levels while the lead pipes are slowly being replaced. This was the fault of civil engineers not being psychic to know the harmful effects of lead.
Which have only been actively reduced in human consumption over the past 50 years.