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Gas Line Repair in Mill Valley, CA
In Mill Valley the mains connection is the norm at 75% of households, with 1% on tank propane. Knowing which you have is the first step and it takes one look at the wall.
Read this first
The utility's regulated line ends at the meter outlet and the piping beyond it belongs to the property owner. That boundary decides most gas line questions in Mill Valley, where 75% of households heat with utility gas and a buried service line runs from the street on most properties.
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 Mill Valley is supplied
Everything upstream of the meter outlet is the operator’s service line under 49 CFR § 192.3. Everything after it is customer piping under local code. That single point is what a contractor establishes before quoting.
It is also why the answer to "is this my problem" is sometimes no, and why it is worth asking before assuming it is yes.
| Households in Mill Valley | Share |
|---|---|
| Utility (mains) gas | 75% |
| Bottled or tank propane | 1% |
| Electricity | 21% |
| Fuel oil and kerosene | 0% |
| Wood and everything else | 3% |
Source: US Census Bureau, American Community Survey 5-year estimates, table B25040 (house heating fuel), 2023 release. Universe: 12,534 occupied housing units. This is the heating-fuel table. It does not enumerate service lines, and no table does at this geography; what it gives is the best available indication of which arrangement a property is on. 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. Mill Valley sits 10 points above the state on mains and 1 point below it on propane. That distance from the state average is the whole argument for publishing a town figure at all.
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 which side of the meter the work is on before anything else. On the utility side it may not be a contractor job at all, and a quote that has not established that has not established whose problem it is.
Other California towns we route in
- Studio City 62% mains gas · 1% tank propane
- Redlands 74% mains gas · 3% tank propane
- Riverside 73% mains gas · 1% tank propane
- Trinidad 3% mains gas · 39% tank propane
- Pasadena 68% mains gas · 1% 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. Non-emergency work in Mill Valley goes through this number as well.
Call (888) 752-8038