Who owns the water service line in Sonora, CA
Which part of the pipe is yours
Yours from the meter to your building
Why, and what to doYours from the cleanout to your building — if certain conditions are met
Why, and what to do
If something’s wrong
Who to call first about the water service line
Who is responsible for which part
Tuolumne Utilities District owns and maintains the service lateral from its main to and including the meter, and stops at the meter's discharge side. Its rules provide that "The District's ownership of and responsibility for operation and maintenance of facilities shall end at the discharge side of water meters that are installed by the District". This is Tuolumne Utilities District's own statement.
- Tuolumne Utilities District
- The service connection - "the service lateral pipe from the main to and including the meter as located by the District and including the curb stop and meter box".
- The property owner
- Everything past the meter. "Water users are also responsible for all privately owned equipment, pumps, appliances, pipes, or other facilities connected to the public water supply on the discharge side of the water meter."
What else is worth knowing
Sources
Tuolumne Utilities DistrictWhat Tuolumne Utilities 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.
Tuolumne Utilities District has classified more of its service lines than most of California: 0.00% of its lines are unclassified, against 9.2% statewide.
- 5,092
- 0 (0.00%)
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 94% of Sonora's land inside the boundary it maps for Tuolumne Utilities District. Within the same city limits it also maps "TUD - COLUMBIA WATER SYSTEM" (3%). A share of land is not a share of homes: open space counts the same as a dense block. 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.
Your other pipe: the sewer lateral
For the sewer lateral, Tuolumne Utilities District says:
In Sonora, Tuolumne Utilities District splits the lateral at a property line cleanout if there is one, and otherwise leaves the whole lateral with the owner. Its ordinance says "The private lateral is owned and maintained by the property owner" and "The public lateral is owned and maintained by the District." - but "If no cleanout or manhole exists near the property line then the entire lateral from the points of service to the lateral connection at the public sewer main is considered a private lateral."
Your sewer lateral is yours to the cleanout; your water line stops being yours at the meter.
Who pays for the sewer lateral in Sonora, CALook up a specific address
This page describes what applies to properties in Sonora in general. To see which authorities serve one address, and what records exist for it, search for it.
Search for an addressHow 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.