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Who owns the water service line in Palo Alto, CA

Which part of the pipe is yours

  • Water service line

    Yours from the meter to your building

    Why, and what to do
  • Sewer lateral

    Yours from the cleanout to your building — if certain conditions are met

    Why, and what to do
your buildingproperty linesidewalkstreetmain
The thick length is yours. A dashed marker means the position depends on your property — see below.

If something’s wrong

Who to call first about the water service line

BelowGrid has no first-call guidance on file from Palo Alto about the water service line.

The documents this answer is built on

Who is responsible for which part

The City's utility maintains the water service "from, and including, the Water Meter located near the street curb, up to and including the Water main", and everything downstream of the meter is yours. That is the opposite end of the run from your sewer lateral, which the same utility makes yours all the way to the main unless there is a City cleanout. One more thing worth knowing before you remodel: a project over $200,000 can oblige you to replace the City's own side of the service. This is Palo Alto's own statement.

Palo Alto
The service from the meter out to the main, and the distribution system beyond it. Rule and Regulation 21 states that "CPAU is responsible for the maintenance of the Water Service from, and including, the Water Meter located near the street curb, up to and including the Water main and the remainder of the City's Water Distribution System". The meter itself is on the utility's side of that sentence.
The property owner
Everything on the house side of the meter, and the meter's housing. Rule and Regulation 21 states that "the Customer is responsible for maintenance of the on-site Water Distribution System downstream of the Water Meter in accordance with the Palo Alto Municipal Code Chapter 16.08, including the Water Meter vaults and boxes".

What else is worth knowing

The meter is the line, but three things change what it costs you. If your property is on a private street, in a subdivision or served across an easement, "CPAU's responsibility is limited to the Water mains and Water Meters in the Public Utility Easement" - the handover is still the meter, but what the utility will reach is narrower, and where its use of the easement damages common areas Rule 21 says it is "the responsibility of the owner or Home Owner's Association, not the City, to restore the affected portions". If a repair is needed because of your own breach of the code or the rules, expenses "are the responsibility of the violator, and must be paid to CPAU before CPAU performs any maintenance required as a result of the violation". And building work can put the utility's own side of the meter on your bill: where a service 2 inches or smaller is not polyethylene or copper, a new structure or an addition over the value threshold obliges you to replace it "from the main up to and including the Water Meter box".

Sources

City of Palo Alto Utilities, Special Water Utility Regulations, Rule and Regulation 21, issued by the City Council, effective 1 June 2026

Checked

What Palo Alto reported to the State about service-line materials

Federal rules required every community water system to inventory its service lines and publish the result. These are the figures this one filed.

The inventory records what each line is made of: lead, galvanized requiring replacement, non-lead, or lead status unknown. “Still unclassified” counts the lines whose material has not been identified. It does not mean they are lead.

Palo Alto has classified more of its service lines than most of California: 0.00% of its lines are unclassified, against 9.2% statewide.

Service lines reported
20,872
Still unclassified
0 (0.00%)
Across California, 9.2% of service lines are unclassified.
Share of service lines still unclassified
  • Palo Alto0.00%
  • California9.2%

What this page cannot 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 Palo Alto's land inside the boundary it maps for the city's own water system. Measured 25 Sep 2026.
  • Classified does not mean inspected. Across California only 22% of service lines were established by field inspection; most of 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 4 Sep 2026. They may not reflect its current inventory - ask the water system to confirm anything about a specific address.
Palo Alto: official site

Your other pipe: the sewer lateral

For the sewer lateral, Palo Alto says:

It depends on whether you have a City sewer cleanout, and where it is. With one, Palo Alto owns and maintains the lateral "from the Wastewater Main up to and including the first City Sewer Cleanout" and you own the rest to your building. Without one - or if it is inaccessible, or if the cleanout is yours and sits "more than 5 feet behind the property line" - you own "the entire Sewer Lateral between the City's Wastewater Main and the building".

Your sewer lateral is yours to the cleanout; your water line stops being yours at the meter.

Same trench, separate authorities, decided separately.

Who pays for the sewer lateral in Palo Alto, CA

Look up a specific address

This page describes what applies to properties in Palo Alto in general. To see which authorities serve one address, and what records exist for it, search for it.

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How this compares across California