Some of the ground water data is flawed. My understanding is that in some areas of the country, arsenic is naturally present in the water. Also, if it were such a problem, a lot of people would be dead by now. Especially in Hawaii, where crabgrass and goosegrass grow 12 months out of the year.
They who can give up essential liberty to obtain a little temporary safety, deserve neither liberty nor safety.
Benjamin Franklin 1775
Sell not virtue to purchase wealth, nor Liberty to purchase power.
Benjamin Franklin Poor Richard's Almanac1738