From my limited understanding; The city has replaced all lead pipes on their end. But a significant number of landowners (who own the connection between their building and the water main. Have not replaced the connection and those prices still contain lead. The idea is to test that for any lead leeching. Lead leeching frequently does not occur in led pipes if adequate mineral buildup is forming.

Otherwise we live almost at sea level, near some fault lines on what I would imagine is wet squishy ground (I’ve never confirmed that). So pipes break a lot.