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Gas Line Repair in San Marino, CA
Gas arrives by pipe for 81% of homes in San Marino. The part of it you can see is the meter; the part that goes wrong most expensively is the part you cannot.
Read this first
Responsibility changes hands at the meter outlet. The line under the ground between the street and the meter is the utility's up to that point, and the yard line and house piping after it are the property owner's. 81% of homes in San Marino heat with utility gas.
Source: US Census Bureau, American Community Survey table B25040; the service line boundary is 49 CFR § 192.3.
If you smell gas right now
Leave the building on foot. Do not use a phone or a light switch inside. Call 911 and your gas utility from somewhere else, and do not call us — we are a referral service, not an emergency line. The full list, in order.
How San Marino is supplied
Under 49 CFR § 192.3, a service line ends at "the outlet of the customer meter or at the connection to a customer’s piping, whichever is further downstream". Upstream of the meter is the operator’s regulated line. Downstream is customer piping, under local code.
That is where the regulated line stops. Who pays is a separate question set by tariff and state regulation, and it is worth asking your utility rather than assuming.
| Households in San Marino | Share |
|---|---|
| Utility (mains) gas | 81% |
| Bottled or tank propane | 2% |
| Electricity | 17% |
| Fuel oil and kerosene | 0% |
| Wood and everything else | under 1% |
Source: US Census Bureau, American Community Survey 5-year estimates, table B25040 (house heating fuel), 2023 release. Universe: 3,934 occupied housing units. B25040 records what heats the house, which is the best available guide to whether a property has mains gas or a tank — it does not count service lines directly. Service line definition: 49 CFR § 192.3, via PHMSA interpretation PI-12-0003.
Across California as a whole, 65% of households are on mains gas and 2% on tank propane. San Marino sits 15 points above the state on mains and about level with it on propane. A state figure would flatten exactly that difference, which is the reason these pages are built town by town instead.
Before anyone digs on the property
Before any digging — a fence post as much as a foundation — call 8-1-1. It is a nationwide toll-free number, it costs nothing, and PHMSA puts the chance of avoiding an incident afterwards at 99 percent.
Source: PHMSA, 811 Day.
What to ask whoever quotes it
Ask how the work will be tested and what happens at the end of it. An inspection on gas work is normal rather than a complication, and a contractor who treats it as one is telling you something.
Other California towns we route in
- San Rafael 65% mains gas · 3% tank propane
- Garden Grove 70% mains gas · 2% tank propane
- Lomita 74% mains gas · 1% tank propane
- Signal Hill 73% mains gas · 1% tank propane
- Monrovia 70% mains gas · 2% tank propane
Checking a plumber in California
California licenses are issued by the Contractors State License Board, which publishes a public search you can use before work begins. California licenses the C-36 plumbing contractor; there is no state journeyman license.
Gas work is separately permitted and separately licensed in most jurisdictions, so ask specifically about gas rather than plumbing in general.
For repair work, not for a suspected leak.If you can smell gas, leave and call 911 or your utility from outside; this is the wrong number for that. For everything else — a line, a meter, an appliance connection — we will route you to a contractor covering your area, free of charge to you. Gas is one part of what San Marino calls us about.
Call (888) 752-8038