Who owns the water service line in San Diego, CA

The City states that the property owner is responsible for the water system from the meter onward. It publishes where the division falls without saying, in words, who maintains the run between the main and the meter. This is San Diego's own statement.

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 all the way to the main, including the fitting where it joins
Why, and what to do

The thick length is yours.

Where the responsibility divides

San Diego: The City places the division at the meter and describes it as a division of responsibility - "this diagram shows the division between what is the City's responsibility and what is the responsibility of the property owner" - but does not state in words that it owns or repairs the run from the main to the meter. What it publishes is where its side ends, not what it does with it.
The property owner: Everything from the meter inward. The City states that a property "is connected to a City water main through a water lateral service line via a water meter" and that "the property owner is responsible for the maintenance of any portion of the water system from the meter".
What else is worth knowing: The meter. On this pipe the owner's share begins there, near the property line; on the sewer lateral the same City says the owner's share runs "from the property all the way to the connection with the sewer main", which may be "in the street, past the property line; on an easement; or in a canyon". One department, one page, and the two pipes under the same garden answer differently.

City of San Diego Public Utilities Department, "Your Meter, Water Pressure & Plumbing System"

Checked 2026-09-12

What San Diego 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.

San Diego 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: 286,200
Still unclassified: 0 (0.00%)

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.
Classified does not mean inspected, and this system inspected less than most. San Diego established 0.6% 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.

Check your address with San Diego

Your other pipe has a different answer

For the sewer lateral, San Diego gives the opposite answer to the one above:

The City states that the entire sewer lateral is the property owner's private property, including the length running under the street to the sewer main. A Council Policy will clear or repair the section beyond the property line at no charge, but only where the property has lost all sewer service and only after the owner has paid a plumber to establish where the fault is.

Your sewer lateral is yours to the main, fitting included; your water line stops being yours at the meter.

Same trench, separate authorities, decided separately.

Who pays for the sewer lateral in San Diego, CA

How 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.