Plumber in Norwalk, CA

The Sewer Line in Norwalk

Who Owns the Sewer Lateral in Norwalk?

The property owner does, all the way to the city’s main. Norwalk’s Public Services Department says so on its private sewer lateral page: the house lateral is the pipe connecting a property’s plumbing to the city’s main sewer, and maintaining and repairing it is the owner’s responsibility, the part within the public right-of-way included. The city runs its sewers under the Los Angeles County sanitary sewer ordinance, which it adopted by reference. That ordinance defines the house lateral as the piping in the street or right-of-way from the property line to the main, and it has the owner of the property served keep it in a safe and sanitary condition. So the pipe under the yard, the parkway, the sidewalk and the street is all the owner’s.

The mains are the city’s. Its Utilities Division looks after more than 160 miles of sewer line, over 2,400 manholes and three lift stations, and it keeps a 24-hour emergency response for sewer problems. Norwalk is not in the county’s Consolidated Sewer Maintenance District, and the county’s own service map shows no county sewer maintenance area inside the city. From the city’s pipes, wastewater runs into trunk sewers of the Los Angeles County Sanitation Districts, which carry it on to their regional treatment plants. Since June 2013 the city has collected a sewer service charge to keep its own system up.

What the City Expects of a Lateral

• Kept clear. Free of roots, grease and debris. Roots cut out of a lateral are to be caught and removed, not pushed downstream into the public sewers, and the city asks owners not to use root-killing products such as those made with methyldithiocarbamate.

• Sound and watertight. No cracks or breaks, and no gaps that let storm water in to overload the system.

• A capped cleanout. The city wants a two-way cleanout at the property line or the sewer main easement, securely capped. That opening is where we clear a main line from. Where a house has none, we go in through the roof vent or through a toilet lifted off its flange, and we can install a cleanout after the line is open.

• Inspection at a sale and after repeat clogs. The city recommends a camera inspection of the lateral by a licensed contractor before a property is sold or transferred and when a lateral has blocked more than once in three years. Its page says a change of use that adds to the sewer load requires one, and that a lateral must be inspected, and possibly repaired, when the city repairs or replaces the main it connects to. If an inspection shows the lateral is defective, especially old clay pipe, the owner is required to replace it with a modern material such as PVC.

Permits for Lateral Work and Work in the Street

• Building and Safety. Work on a sewer line may need a sewer permit from the Building and Safety Division, which takes questions about them at (562) 929-5733.

• Engineering. Any excavation in the parkway, the sidewalk or the pavement takes an encroachment and excavation permit from the Engineering Division of Public Services, applied for by email. The application asks for a certificate of insurance and a state contractor’s license, and the work must be done under the appropriate license classification, which the form does not name. Inspections are booked at least two business days ahead, Underground Service Alert gets 48 hours’ notice, and weekday work runs from 8 a.m. to 4 p.m. unless the permit says otherwise.

• Putting the street back. Trenches are backfilled and repaved to city standards, and a street repaved in the last five years has to be restored across the full lane width for at least 30 feet.

Here is how our part of the job runs. We clear a Norwalk lateral the whole way to the city’s main. For a repair, the trenchless methods come first, and we dig only when the pipe leaves no other choice. If a repair would mean opening the street, we do the street portion as well, under the encroachment and excavation permit and the city’s rules for putting the street back.

If Sewage Backs Up in Norwalk

• Stop using water. Every sink, toilet and appliance empties into the same lateral, so each flush or wash cycle adds to what is coming up.

• Look at the street. Sewage coming out of a manhole or running along the gutter points to a city main. Report it to Public Services at (562) 929-5511 or through the city’s online work order system, and after hours to the Norwalk Sheriff’s Department at (562) 863-8711, the number the city gives for after-hours emergencies. The city also asks that nobody lift a sewer manhole cover to drain a flooded street.

• A clear street means your line. If the main is running and the house still backs up, the stoppage is usually in your lateral, and that is a call to us. Uncover the cleanout if you know where it is.

Water in Norwalk

Who Supplies Water in Norwalk?

One of three suppliers, depending on the street. The city’s utility providers page lists Golden State Water, Liberty Utilities and Norwalk’s own municipal water system. The city system’s 2025 urban water management plan says it serves about 20,300 people in parts of Norwalk and Artesia and a small unincorporated area, that Liberty Utilities and Golden State Water Company serve the rest of the city, and that some of its own service sectors buy their water from Santa Fe Springs and Cerritos. On Los Angeles County’s water purveyor map, Liberty Utilities has the largest share, across the middle and south of the city, Golden State Water covers much of the north, and the city system serves smaller sectors spread around town. Those lines are approximate. Your water bill names your supplier, and the city posts a provider map as well.

All three blend water imported by the Metropolitan Water District with groundwater pumped from the Central Basin, and each publishes its own figures. The city system’s report on 2025 gives total hardness averaging 256 milligrams per liter in its well water and 235 in the imported supply. Liberty’s report on 2025 for its Bellflower/Norwalk system gives averages of 255 parts per million from its wells and 236 from the imported water, and Golden State Water’s 2025 report for its Norwalk System gives 310 on average at its sources, in a range of 137 to 505. The figure for your own tap is in your supplier’s annual water quality report.

Who to Call About a Water Problem

A break in the street, a leaking meter or a sudden drop in pressure goes to your supplier first: Liberty Utilities at (800) 727-5987, Golden State Water at (800) 999-4033, or, for the city system, Public Services at (562) 929-5511. If the meter keeps turning with every fixture off and nothing looks wet, call us to track down the leak. And if the shutoff valve at your house is stuck, buried or missing, we replace it with a working emergency shutoff valve, so the next time a pipe gives out you can stop the water yourself.

Additional Information

Who pulls the permit for plumbing work in Norwalk, me or you?

Either of us can, if the property is yours. Building and Safety, at City Hall, 12700 Norwalk Boulevard, issues the permits, and the city requires one for most plumbing, mechanical and electrical work. A permit technician can be seen by appointment through (562) 929-5733, and the city’s online portal handles inspection requests and some applications. The city will issue a permit to the property owner shown on the grant deed, who brings California ID and signs an owner-builder declaration taking responsibility for the project; electrical permits are the exception and go only to a C-10 licensed contractor. When a repair cannot wait, the work can go ahead, with the permit application filed by the next working day. So if your name is on the deed, we can pull the permit for you, or you can pull it yourself if you prefer.

Which plumbing code does Norwalk use?

The 2025 California Plumbing Code, which the city adopted in November 2025. The one local change takes out the state code’s administrative division in favor of the city’s own administrative code, and a search of the municipal code turns up no requirement for earthquake gas valves. The city’s code does exempt a few small jobs from permits, such as clearing a stoppage or stopping a leak without replacing any pipe, valve or fixture.

Plumbing Help in Norwalk, Day and Night

Rooter & Plumbing Masters is veteran-owned, and our office and crews speak Spanish. A drain that needs snaking every few months, a main shutoff that will not turn, a water bill that has crept up for no reason: each is easier to fix before it turns into water on the floor.

Call (888) 855-6680 any time to set up a free estimate at your Norwalk home or business.