[q3k]

> Result: Waaaayyyy over the (German) limits for lead in drinking water.

Is this a sensible comparison to make? You will likely be drinking at most 120ml (4 shots) of rancilio espresso per day, which is around 4% of your daily ~3L recommended water intake.

How high were the results, anyway?

[mschuster91]

> Is this a sensible comparison to make?

There is no such thing as "safe lead exposure limit".

[carlob]

> ~3L recommended water intake.

This is a myth. You're supposed to have around 2 l of water, from all sources: meaning that you'd have to eat only freeze-dried food to actually need that much water.