Anne Arundel County is the latest jurisdiction in Maryland to publish a map showing residents whether they need to check their home service lines for lead water pipes. It’s not because officials think pipes have lead in them. It’s because federal law requires utilities to inventory lead pipes in home service lines. “[T]he probability of finding lead in the County water system is low, with our water quality consistently remaining well above state and federal regulatory standards,” Anne Arundel County officials wrote on the county website.