Spring Valley Water Tap Records at the Internet ArchivePublic DomainCreative CommonsThis excerpt from the Spring Valley Water Tap Records shows the date when water service was first connected for 510 Buchanan (later 530 Buchanan), and shows that the first customer was J. Sonnichsen. 530 Buchanan StreetEra: 1880sSites: San FranciscoSan Francisco Public Library at the Internet Archive