Actually, the Roman pipe store is a bit of an urban legend.
According to this PNAS [0] paper: "Lead pollution of “tap water” in Roman times is clearly measurable, but unlikely to have been truly harmful."
According to this PNAS [0] paper: "Lead pollution of “tap water” in Roman times is clearly measurable, but unlikely to have been truly harmful."
Nor do I trust certain natural additives or physical processing methods; chemical is full of unknowns, but natural can be harmful too. I try to avoid white flour and added sugar, for example, and I have my doubts about how good of an idea it was to breed all this sweetness into modern fruit...
Nature is chemicals. What you are saying is that you trust the chemical outputs of the chaotic natural environment more than the ones produces by scientists.
In that context, every lead source ends up becoming increasingly important.
Note, you would really get a differential equation with several terms, but more or less the same idea just after more time and balanced with water that overflows the field etc.