Who owns the water service line in Los Altos, CA
The utility owns the service pipe, the curb stop, the meter and the meter box. The customer owns the piping past the meter - and the curb stop, which folklore treats as the boundary, is expressly the utility's. This is California Water Service, Los Altos Suburban District's own statement.
Which part of the pipe is yours
Yours from the meter to your building
Why, and what to do
Where the responsibility divides
- California Water Service, Los Altos Suburban District
- The utility's CPUC tariff states that "the service pipe, curb stop, meter, and meter box furnished by the utility at its own expense and located wholly or partially upon a customer's premises are the property of the utility" - so the run from the main, the fitting at the curb, and the meter itself are all the utility's, even where they sit on the customer's land.
- The property owner
- The piping from the meter onward. The tariff makes this the customer's own job as a condition of getting service: they must "furnish and lay the necessary piping to make the connection from the service connection to the place of consumption" and must "keep such piping in good repair" (section A.2.a). Cal Water puts the same line to householders in plainer words on its help page "Who is responsible for making repairs?": "Property owners are responsible for repairs to plumbing on their side of the water meter." The same page pairs that with "Cal Water is responsible for repairs within the distribution system", which does not say whether the pipe running to your meter counts as part of that system - so if the leak is on the street side of the meter, that is the sentence to put to them.
What California Water Service, Los Altos Suburban District has told the State
Federal rules required every community water system to inventory its service lines and publish the result. These are the figures this one filed.
California Water Service, Los Altos Suburban District has classified less of its network than most of California: 82.6% of its service lines are still unclassified, against 9.2% statewide.
- 18,770
- 15,503 (82.6%)
What this does not tell you
- This describes who is responsible for which part of the pipe. It is not a record of what your own service line is made of.
- The State's service area map puts 99% of Los Altos' land inside the boundary it maps for California Water Service, Los Altos Suburban District. Measured 2026-09-11.
- Unclassified means nobody has established what the pipe is made of. It does not mean lead was found.
- Classified does not mean inspected, and this system inspected less than most. California Water Service, Los Altos Suburban District established 0.0% of its classifications by field inspection, against 22% across California; the rest come from records, the year of construction, or a predictive model.
- These figures were submitted to the State by the water system itself and were read on 2026-09-04. They may not reflect its current inventory - the system's own page is the place to confirm anything about a specific address.
Your other pipe has a different answer
For the sewer lateral, Los Altos says:
Unusually, the City pays for part of this pipe. The owner cleans and maintains the whole lateral from the house to the main, but reconstruction and repair of the street portion - beyond the first joint after the property line - is the City's - but the code makes that duty "subject to compliance with" its cleanout section, so the fitting is what the City's share rests on. A street-side blockage will usually be cleared by City crews, though the City calls that a courtesy rather than a duty. Part of Los Altos is served by Cupertino Sanitary District instead, which answers the same question its own way.
Who pays for the sewer lateral in Los Altos, CAHow this compares across California
- Why your two pipes disagree — the places where the sewer and water authorities contradict each other about the run beneath the road.
- Which water systems know what is buried — how much of each California system’s network the utility can actually identify.