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East Palo Alto, CA · Emergency and Repair Plumbing · ZIP 94303
Emergency Plumber in East Palo Alto, CA: Which Water Company and Sewer District Answers for Your Line?
Water is running, a drain has backed up, or the hot water has stopped, and you need to know who to call. In East Palo Alto the answer depends on your address, because the city, three water providers and a sanitary district each cover part of the picture. This page sorts out which is which, and what a plumber does once the problem is yours.

Water running right now? Shut it off, then work out whose pipe it is
Close the main shut-off valve where the supply enters the house before you do anything else. If you cannot find it, call while you look, and we can talk you through it. The steps for a burst pipe cover what to do once the water is off.
- Close the valve. The main shut-off first. A single fixture stop is enough only if the leak is clearly beyond it.
- Note where the water is. Inside the house, in the yard between the house and the street, or at the street itself. That decides who fixes it.
- Open a low cold tap. This drains what is left in the pipes, so it does not keep pouring through the break.
- Call the right party. Walls, ceilings, fixtures and the water heater are on your side, so call us. Water coming up at the curb or around the meter box usually needs the water company, not a plumber.
Water still running? Call now and keep looking for the valve while we talk.
Call (833) 840-2034Which water company is on your bill?
East Palo Alto does not have one water supplier. The city says its own water system serves about 80% of connections, and the rest are served by Palo Alto Park Mutual Water Company or the O'Connor Tract Co-operative Water Company. Who you call about a problem at the street depends on which of the three sends your bill.
| Provider | What is published about it | For a problem at the street |
|---|---|---|
| City of East Palo Alto water system | Operated by Veolia, which buys water from the San Francisco Public Utilities Commission (SFPUC). About 80% of connections. | Veolia is the contact the city lists, at (650) 322-2083 |
| Palo Alto Park Mutual Water Company | A private mutual company serving small areas of East Palo Alto, supplied by five deep wells and two storage tanks. | Call the company directly, not the city system |
| O'Connor Tract Co-operative Water Company | Serves specific parts of East Palo Alto and a small part of Menlo Park's Willows neighborhood, supplied by two deep wells. | Call the company directly, not the city system |
Your water bill names the company. Renters can ask the landlord for a copy. The city also publishes a map of the three service areas on its water page.
Does the water supplier change what a plumber checks?
Sometimes. Water from the city system comes from SFPUC, the regional system that also supplies the City of Palo Alto Utilities. The general picture on our water treatment page is a fair starting point for those homes, although the figures there come from Palo Alto's own report rather than one for East Palo Alto.
Homes on the two mutual companies get well water. We have not verified the mineral content of either company's wells, so we do not assume it. Ask the company for its annual water quality report before you spend money on a softener or a filter.
If you are weighing a new water heater or a treatment system, tell the plumber which company you are on, so the advice fits the water you actually have. Our water heater troubleshooting page covers what a plumber checks first.
Backed-up drain or sewer smell: where the sanitary district comes in
Sewer service in East Palo Alto is run by the East Palo Alto Sanitary District, which the city describes as its subsidiary. That is a different agency from the one that handles sewers in Palo Alto, so the rules our sewer line rules page describes for Palo Alto do not apply across the creek.
The district publishes a Sewer Lateral Connection Application Process. It asks for a completed Application for Sewer Lateral Work with plans, after which the district sends an itemized invoice. The applicant arranges inspections: the City of East Palo Alto Building Department for work on private property, and West Bay Sanitary District for work in the public right of way.
That guide covers new connections. It does not say when a repair or replacement needs the same application, so confirm with the district before any digging. A plumber should ask the same question.
- Several drains gurgle or slow down at the same time
- Flushing a toilet makes the tub or a floor drain bubble
- A sewage smell near the cleanout outside the house
- Water backs up first in the lowest fixture in the house
Any of these points to the shared line rather than one fixture. Cable drain cleaning and high-pressure jetting clear it, and a camera inspection shows whether the pipe itself has failed.

Drain backing up in more than one place? Call before it reaches the floor.
Call (833) 840-2034Near San Francisquito Creek: why drying cannot wait
San Francisquito Creek is the boundary between East Palo Alto and Palo Alto. It overflowed on February 2 to 3, 1998, and the Palo Alto Daily Post puts the damage at about 1,700 properties spread over three cities: East Palo Alto, Palo Alto and Menlo Park.

That history is context, not a statement about any address. What it means in practice is simple. After water enters a building, standing water comes out first, then the structure is dried with air movers while moisture readings are tracked. Our water damage response page covers removal and drying.
Calling from ZIP 94303: what we confirm first
East Palo Alto shares ZIP code 94303 with south Palo Alto. It sits in San Mateo County, while Palo Alto is in Santa Clara County, and both fall inside the area we cover. We confirm your address on the call rather than relying on the ZIP alone.
Have these ready and the call goes faster.
- Your street address and the nearest cross street
- Which water company sends your bill
- Whether water is still running, and from where
- Whether one fixture is affected or several
East Palo Alto problems, and the page that covers each
| The problem | Start here |
|---|---|
| A hidden leak, a warm spot on the floor or an unexplained water bill | Leak detection and slab leak repair |
| Slow or backed-up drains | Drain cleaning and hydro jetting |
| Sewer backups, or roots in the line | Sewer line repair and trenchless repair |
| No hot water, or a leaking tank | Water heater repair and installation |
| A split or broken pipe | Burst pipe repair |
| Repeated pinhole leaks in old pipe | Repiping |
| A dripping faucet, a running toilet or a jammed disposal | Faucet and sink, toilet and garbage disposal repair |
| Water in the house after a leak or flood | Water damage restoration |
What happens after you call
- We answer your call. We take the address and what the plumbing is doing, then send a plumber serving your area.
- The plumber finds the cause. You get a written range once the problem has been seen and before any work begins.
- Work starts when you agree. If the fix belongs to the water company or the sanitary district, we say so rather than sell you a repair.
That last point matters more here than in most places. With three water providers and a separate sewer agency, an honest East Palo Alto plumber spends part of the first call working out whose problem it is.
Plumbing problem in East Palo Alto? Call and we will tell you whose problem it is.
Call (833) 840-2034Water main breaks, hard water and lateral permits in East Palo Alto
Do you serve East Palo Alto?
Yes. We take calls from East Palo Alto addresses in ZIP code 94303, a ZIP it shares with the south side of Palo Alto. We confirm your address when you call, because a ZIP code alone does not settle whether a given street is covered.
Who do I call about a water main break in East Palo Alto?
It depends on who supplies your street. The city's own system, operated by Veolia, serves about 80% of connections, and the city lists (650) 322-2083 for it. Homes on Palo Alto Park Mutual Water Company or the O'Connor Tract Co-operative Water Company call those companies. If water is flooding your property, close your main shut-off first, then call.
Is the water in East Palo Alto hard?
It depends on the supplier. The city system buys water from SFPUC, the same regional source as Palo Alto's, whose own report is summarized on our water treatment page. The two mutual companies pump from wells, and we have not verified their water, so ask the company for its annual water quality report.
Does a sewer lateral repair in East Palo Alto need a permit?
Sewer service here belongs to the East Palo Alto Sanitary District, not the City of Palo Alto. Its published process asks for an Application for Sewer Lateral Work with plans, then an itemized invoice, and the applicant arranges inspections. That guide covers connections and does not say when a repair needs it, so confirm with the district before work starts.
How much does a plumber cost in East Palo Alto?
It depends on the problem, how much access is needed and the time of day. You get a written range once the plumber has seen the problem and before work starts. Our cost page lists typical ranges by service.
Not sure whose pipe it is in East Palo Alto?
Call and give us your address. We will tell you whether it is yours to fix, the water company's, or the sanitary district's, and give you a written range before any work starts.
