Plumbing Across L.A.

The neighborhood paper about the pipes under Los Angeles houses

Neighborhood edition

Hills & Eastside: steep lots, old pipes, harder water

Silver Lake, Echo Park and the old Eastside are all City of Los Angeles and LADWP, but their water comes from different sources, and many houses here predate 1930.

From the Plumbing Across L.A. desk. Updated .

Tall ornate Victorian house with palm and cypress trees
A Victorian in Angelino Heights, next to Echo Park.

Stories filed for this part of town

From Hollywood's hills to El Sereno, the house you own may have more history than paperwork. The neighborhoods below share a city, a sewer agency and a building department. They do not share a water source, a slope or a decade.

Who supplies your water here

LADWP supplies every neighborhood in this edition, and LADWP's service-area map is the part that surprises people. Its water quality report puts the Hollywood Hills in the San Fernando Valley area, Hollywood, Los Feliz and Silverlake in the Central area, and Echo Park, Highland Park, Eagle Rock and their neighbors in the Eastern area.

That split shows at the tap. Central water draws on the Los Angeles Aqueduct Filtration Plant (6.0 grains per gallon in 2025) and the Southern Combined Wells (6.8). Eastern water is State Water Project and Colorado River supply through the Weymouth plant (13.7 grains, or 234 mg/L), Diemer (13.8) and Jensen (8.2). Sources shift with operations, so read these as ranges of possibility. How hard your water is has the fuller table.

Two-story wood house with porches behind a white picket fence
A house on Echo Street, Los Angeles.

What kind of houses are here

Plenty are old enough to have been repaired several times. The LA Conservancy dates Angelino Heights, in Echo Park, to 1886 through 1925 and calls it the city's best preserved Victorian neighborhood. Its overlay zone was the first the City Council adopted, in 1983, and its zoning has long allowed bungalow courts and back units.

Bungalow courts turn up across this edition. The Conservancy describes Hollywood's courts of 1921 to 1925 as typical of the area's early housing, and the Maycrest Bungalows in El Sereno as a rare Tudor example with eight units around a courtyard. Much of Highland Park and parts of Montecito Heights fall inside the city's Highland Park-Garvanza overlay zone. The community plan for Silver Lake and Echo Park notes a concentration of Modernist homes around the reservoir, so a Silver Lake house may be newer than its neighbors.

Any of these may have been re-plumbed at any time. Start with the page for your decade: before 1930 or the 1930s and 1940s.

What tends to go wrong here

No agency publishes a neighborhood count of plumbing failures, so what follows is what the age and the ground point toward, not a tally.

  • Old water pipe. If a house still has galvanized pipe, low pressure and brown water are the usual signs. LADWP's inventory covers service lines, not what is inside your walls.
  • Slopes. Houses below the street may rely on a pump, and houses high on a hill may have pressure questions. Hillside sewers and water pressure explains both. Pump work is for a licensed plumber. Your part ends at seeing whether a breaker or switch has tripped; leave the basin closed, and stay away from any panel or pump with water around it.
  • Old drains and long laterals. The City of Los Angeles leaves the whole pipe to the owner, out to the main under the street. See who owns your sewer lateral and cast iron and clay drains.
  • Shared lines. A court or duplex may have one sewer line and several households. Bungalow court plumbing covers the questions to ask.
  • Lead questions. They are about your faucet and solder, not usually the street: lead and your tap.

Neighborhood stops

  1. Hollywood HillsLADWP (Valley list)All eras, on slopesCheck whether a pump serves the sewer.
  2. SilverlakeLADWP (Central list)1920s through postwarSofter sources, some Modernist houses.
  3. Echo ParkLADWP (Eastern list)Before 1930, oftenVictorian and Craftsman houses, some courts.
  4. Highland ParkLADWP (Eastern list)Before 1930, oftenAn overlay zone may affect exterior work.
  5. Eagle RockLADWP (Eastern list)Pre-war, oftenHarder sources; confirm your year.
  6. El SerenoLADWP (Eastern list)A few 1920s courtsSmall houses on hilly streets.

Who handles this

Questions that come up

Is my Silver Lake water softer than Echo Park water?

Often, by LADWP's map: Silverlake is Central and Echo Park is Eastern, where Weymouth and Diemer tested about twice as hard in 2025. Sources shift, so a test at your own tap settles it.

Does living in a historic overlay zone change my plumbing work?

This paper has not found a rule that singles out interior plumbing. Exterior changes are what overlay zones usually review, so ask the city's preservation office before moving anything visible, and LADBS about the permit.

A hillside house has a pump. What is safe for an owner to check?

Only whether the breaker or switch has tripped. Don't open the basin, and call a licensed plumber if an alarm sounds or anything backs up.

What this was checked against

  1. Who is on which LADWP list: LADWP report
  2. Angelino Heights: LA Conservancy
  3. Hollywood bungalow courts: LA Conservancy
  4. Maycrest Bungalows: LA Conservancy
  5. Highland Park-Garvanza overlay: Los Angeles City Planning
  6. Lateral ownership: City S-Permit handout

Sources read in November 2026. Rules and prices change: check the agency before you act.