Hm, looking at those numbers if you went by the worst possible readings, and assuming 4 espresso coffees a day with the average length of 30ml you'd get 0.

Hm, looking at those numbers if you went by the worst possible readings, and assuming 4 espresso coffees a day with the average length of 30ml you'd get 0.042mg/ml * 0.030ml * 4 = 5.04µg of lead According to https://www.atsdr.cdc.gov/csem/csem.asp?csem=34&po=9 https://www.atsdr.cdc.gov/csem/csem.asp?csem=34&po=9 adults absorb 20% on a full stomach and up to 80% empty. So always eat before your espresso! Though a commercial machine running a regular takeaway workload is unlikely to have much lead in due to the volume of water going through it.