What to Do (and Not Do) If You Smell Gas
Real safety information for a genuinely time-sensitive situation, especially relevant on rural and farm properties.
This is genuine safety information, not a sales pitch, and it applies everywhere we work, including the farm and agricultural properties common around Poolesville, where propane tanks and longer gas line runs are more common than in a typical suburban home.
If You Smell Gas: What to Do
- Leave the house or building immediately. Don't stop to investigate the source.
- Don't operate any switches, including light switches, or anything electrical, a spark can ignite gas that's accumulated in the air.
- Don't use a phone inside the building. Wait until you're safely outside and away from the structure.
- Call your gas utility's emergency line and 911 once you're at a safe distance.
- Don't return to the building until you're told by emergency responders or the utility that it's safe to do so.
What Not to Do
Don't try to locate the leak yourself, don't light a match or use a lighter to "check" for gas, and don't assume a faint smell is nothing simply because nothing bad has happened yet. Natural gas is odorized specifically so that even a small leak is noticeable, treating that smell as a real signal rather than a false alarm is the safer default every time.
After the Emergency Is Resolved
Once the utility or emergency responders have confirmed it's safe, the actual gas line issue, a failing connection, aging pipe, or an appliance connection problem, still needs to be found and repaired properly. That's where a licensed plumber comes in, our gas line installation and repair page covers what that diagnostic and repair process looks like.
Why Rural and Farm Properties Face Some Different Considerations
Properties with propane systems, longer gas line runs to outbuildings, or older agricultural infrastructure have more total gas line length and more connection points than a typical suburban home, which statistically means more places where an issue can develop. If you're not sure whether an appliance or outbuilding on your property is connected safely, that's worth having assessed proactively rather than waiting for a smell to prompt the question. Related plumbing on the same property, like a gas water heater, is worth having checked at the same time if you're already having a gas system inspection done.
Common, Non-Emergency Causes Worth Knowing
Not every gas smell is a dangerous leak in progress, a very brief odor when a pilot light ignites is normal, and a faint, temporary smell after servicing a gas appliance is common. What's not normal is a persistent, noticeable smell with no clear, brief explanation, and the safe approach is treating any smell you can't immediately attribute to something routine as the real thing until proven otherwise.
Reducing the Odds of a Leak Developing
Periodic inspection of visible gas connections, fittings, and flexible connector lines for wear or damage is a reasonable preventive habit, particularly for older gas appliances or connections that haven't been checked in years. If you're planning any gas line work yourself, or having other work done nearby that could disturb an existing line, having a licensed plumber involved rather than working around gas lines informally is the safer approach every time.
Digging Near Gas Lines on Larger Properties
On farm and agricultural properties, digging for fence posts, landscaping, drainage work, or any other project carries a real risk of striking a buried gas line if its location isn't known and marked beforehand. Calling Maryland's 811 utility marking service before any digging project, which is free and required by law before excavation, is one of the simplest and most effective ways to prevent an accidental strike from turning into an emergency.
After a Confirmed Repair
Once a gas line repair is complete, the system should be tested for leaks before being put back into service, confirming the fix actually resolved the issue rather than assuming it did based on the visible repair alone. This is standard practice for any gas line work, not an extra step, and it's worth confirming was done as part of any gas-related repair regardless of who performs it.
Carbon Monoxide Is a Separate but Related Risk
A gas smell and a carbon monoxide leak are not at all the same thing, and it's worth knowing the difference. Natural gas has an added odorant specifically so a leak is noticeable, while carbon monoxide from an improperly vented gas appliance is colorless and odorless. A working carbon monoxide detector on each level of the home, particularly near sleeping areas, is a separate and equally important safety layer from knowing what a gas leak smells like, and neither one substitutes for the other.
If a detector alarms with no gas smell present, that's still an emergency and warrants leaving the home and calling for help right away. Detector batteries and the unit itself both have a service life, so checking the manufacture date and testing the alarm function periodically matters just as much as having one installed in the first place.
Frequently Asked Questions
A very brief smell when a pilot light is lit is common, but a persistent or strong gas odor is not, and treating any ongoing gas smell as a real emergency rather than assuming it's normal is the safer approach.
No. If you smell gas, the correct response is to leave the property, avoid creating any spark, and call your gas utility and emergency services from a safe distance, not to search for the leak's source yourself.
Yes, natural gas and propane detectors are a real, inexpensive early-warning device, similar in concept to a smoke detector, and they're a reasonable addition near gas appliances, particularly in a home or building where a leak might not otherwise be noticed quickly.
The same core principles apply, move away from the area rather than investigating up close, avoid anything that could spark, and call your propane supplier and emergency services from a safe distance rather than approaching the tank or its connections.
No, don't stop to open windows or take any other action inside the space, leaving immediately is the priority, and any ventilation or further action should happen only after emergency responders or the utility have confirmed it's safe to re-enter.
Response times vary, but gas utilities generally treat reported leaks as a priority dispatch, since the safety stakes are well understood industry-wide, though the exact timeline depends on your specific utility and the nature of the report.
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