San Francisco underground utility map
See what's likely under any San Francisco street: water mains, sewers, gas, electric and telecom lines, drawn in 3D from the city's own public records. Free, with no account.
Open the San Francisco mapWhere the lines come from
Street permits show which utility dug on which block. Subsola reads SF Public Works’ Street-Use Permits (excavation). PG&E, AT&T and Comcast don't publish where their lines run, so their gas, electric and telecom lines are placed on the blocks those permits name, at the depths the codes require. Each line on the map says how it was placed and how sure that is.
Where the city or a utility maps its own lines, they're drawn on those routes, from SF Public Works, Bureau of Engineering’s Sewer mains and Side sewers. Public Works maps the whole sewer network, with depths. No one publishes the drinking water mains, so water comes from permits too.
Lead service lines
San Francisco lists lead service lines only at the addresses still waiting to be replaced, not an inventory of every line, so the map shows none.
Before you dig, call 811
Subsola is research, not a utility locate. California law requires a free locate request to USA North 811 two working days before digging, so the utilities can mark their lines on the ground.
Sources
- Street-Use Permits (excavation)SF Public Works. DataSF, Public Domain Dedication and License (PDDL).
- Sewer mainsSF Public Works, Bureau of Engineering. City and County of San Francisco public map service; no open license stated.
- Side sewersSF Public Works, Bureau of Engineering. City and County of San Francisco public map service; no open license stated.
The map also draws hydrants, inlets, street lights and signals, and streets and buildings, from the city's open data. Every card on the map names the record it came from.