Fun fact: many major US cities still have lead pipes[1]. It costs about $20,000 to replace a lead service line from the water main to your home if you live in an older home/building, and the cities are not exactly working hard to replace lead mains.

The cheapest way to lower your risk of lead exposure is to install an RO filter if you believe there are lead pipes (there are many different brands, but the one from APEC is popular and affordable). It has the added benefit of reducing exposure to other nasty things which have pretty much contaminated all the drinking water on earth like PFAS.

I have an unsubstantiated pet theory on correlation between lead poisoning and crime in poorer neighbourhoods due to landlords refusing to replace these (why bother if you don't have to drink the water? landlords have no incentive so long as they can extract rents).

In many cities you can get your water tested for free by the city, just do some searching. They've usually got an online form you can fill out and they'll send you a kit that you have to send back.

[1]: https://www.nrdc.org/resources/lead-pipes-are-widespread-and...