I rent. What do I do about lead pipes?

Ask your landlord what the pipe is made of, and send them your water company's record. The pipe under the yard belongs to the building's owner, and so do the pipes and taps inside. In an apartment building, look up the building's street address. Until it's sorted, a filter that removes lead and the cold-water habits protect you the same way they protect an owner. You can also ask for a water test yourself; if it finds lead, tell your landlord in writing.