I built a free searchable site for public lead service line inventory records:
It aggregates public records from state, city, utility, spreadsheet, and PDF sources into address, water system, city, and state lookup pages.
Caveat: the records are only as good as the public inventories they come from. They can be incomplete, outdated, or wrong, and this is not a water test or a replacement for checking with a local utility.
Right now it is a website. If there is demand, I would like to add an API or bulk data access so people can pull the data directly.
submitted by /u/maximooth
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