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Who owns the water service line in Union City, CA

Which part of the pipe is yours

your buildingproperty linesidewalkstreetmain
The thick length is yours.

If something’s wrong

Who to call first about the water service line

BelowGrid has no first-call guidance on file from Alameda County Water District about the water service line.

The documents this answer is built on

Who is responsible for which part

The District owns and maintains the water service line from the main up to and including the meter. Everything past the meter is the property owner's. This is Alameda County Water District's own statement.

Alameda County Water District
The run under the road and the meter itself, owned as well as operated. The District states that it "operates and maintains the pipe from the main up to and including the water meter", and elsewhere on the same page divides the pipe by title, describing the inventory it filed as covering "the ACWD-owned portion of the service line" and, from 2024, "the customer-owned portion of the service lines".
The property owner
The District states that "the customer's responsibility begins after the water meter and all the pipe downstream going toward the home or business" - the pipe from the meter to the building, the irrigation system beyond it, and the plumbing inside. The District calls that length "the customer-owned portion of the service lines", so on its own account the pipe is yours as well as your responsibility.

What else is worth knowing

The line is the meter. The District describes its service area as one that "includes the communities of Fremont, Newark and Union City", and the State's register puts the District's system over all of Newark, about 84% of Fremont's land and about 54% of Union City's land; the rest - about 16% of Fremont and about 45% of Union City - is ground inside the city limits that no published water service area reaches, not a rival utility, and not necessarily unserved. Check the name on your water bill.

Sources

Alameda County Water District, Lead Service Line Inventory

Also quoted:

Checked

What Alameda County Water District 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.

Alameda County Water District has classified more of its service lines than most of California: 0.17% of its lines are unclassified, against 9.2% statewide.

Service lines reported
88,162
Still unclassified
150 (0.17%)
Across California, 9.2% of service lines are unclassified.
Share of service lines still unclassified
  • Alameda County Water District0.17%
  • 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 54% of Union City's land inside the boundary it maps for Alameda County Water District. A share of land is not a share of homes: open space counts the same as a dense block. Measured 25 Sep 2026.
  • Unclassified means nobody has established what the pipe is made of. It does not mean lead was found.
  • 88,162 is the whole of Alameda County Water District's reported inventory, not this city alone. The State's file records no city for these lines, so they cannot be counted per city.
  • 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.
Alameda County Water District: official site

Where else this answer applies

Alameda County Water District also supplies the place below, and the statement above governs it too:

It settles the sewer lateral separately, often under a different authority from this one.

Your other pipe: the sewer lateral

For the sewer lateral, Union Sanitary District gives the opposite answer to the one above:

The property owner is responsible for the whole lateral, including the run beneath the pavement and the road, up to the point it joins the public main. The District's ordinance goes further than its web page and says the building sewer is owned by the property owner, not merely their responsibility. On a private street or driveway the sewer main itself can be private too, in which case somebody other than the District maintains that as well.

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

Same trench, separate authorities, decided separately.

Who pays for the sewer lateral in Union City, CA

Look up a specific address

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

Search for an address

How this compares across California