Propane Emergency Safety

What to Do If You Smell Propane

Propane is normally odorless, so an odorant is added to help people detect a leak. Many people describe the smell as similar to rotten eggs, sulfur, or a skunk-like odor. If you smell propane or otherwise suspect a significant gas leak, treat it seriously.

If you strongly smell propane or believe there is an active gas leak, leave the area and call 911 from a safe location.
Do not stay in the area trying to locate the source of the leak.

What to Do Immediately

1
Avoid flames and sparks
Do not light matches, cigarettes, candles, grills, or other flames. Avoid operating electrical switches, appliances, motors, or other equipment that could create an ignition source.
2
Leave the area
Move away from the suspected leak and encourage other people nearby to leave as well.
3
Call 911 from a safe location
Once you are safely away from the area, call 911 or your local fire department and explain that you suspect a propane or gas leak.
4
Contact your propane supplier
After emergency services have been notified when appropriate, contact your propane supplier or a qualified propane professional for assistance.
5
Do not return until the area is safe
Stay away from the affected area until emergency responders or a qualified professional tells you it is safe to return.

What Not to Do If You Smell Propane

  • Do not light a match, cigarette, candle, grill, or other flame.
  • Do not turn lights on or off.
  • Do not operate electrical switches or appliances.
  • Do not start a vehicle near the suspected leak.
  • Do not use a phone while you are still in the immediate leak area.
  • Do not attempt to locate the source of a major leak yourself.
  • Do not attempt to repair a leaking propane cylinder or propane system.
  • Do not re-enter the area until professionals say it is safe.

Should You Shut Off the Propane Valve?

In some situations, propane safety guidance may recommend shutting off the propane supply if it can be done safely.

However, you should never approach a hazardous leak, vapor cloud, fire, or unsafe cylinder just to reach a valve.

Your safety comes first.
If reaching the valve would bring you closer to a suspected leak or put you at risk, leave the area instead and let emergency responders or trained propane professionals handle it.

What Does Propane Smell Like?

Propane itself has little or no natural odor. A strong-smelling odorant is added to help people recognize a leak.

The odor is commonly described as:

  • Rotten eggs
  • Sulfur
  • Skunk spray
  • A strong unpleasant gas-like odor

Not everyone will detect the odor the same way, which is why smell should not be the only safety measure around propane equipment.

Other Signs of a Possible Propane Leak

A propane leak may sometimes be noticed by signs other than smell.

  • A hissing or blowing sound near a tank, valve, regulator, or hose
  • Visible vapor, mist, or fog near a leaking container
  • Unusual frost or ice forming around a valve or connection
  • A propane detector alarm
  • An unexplained gas odor near propane equipment

If you observe signs of an active gas release, move away and treat the situation as a potential emergency.

What If You Smell Propane Near a Grill?

If the odor is strong or you hear gas escaping, do not light the grill or attempt to use it.

Move away from the grill and cylinder. If there appears to be an active or significant leak, contact emergency services from a safe location.

For a routine connection check where no obvious emergency exists, a bubble test can be used before operating the appliance.

What If You Smell Propane Inside a Building?

Treat propane odor inside a home, garage, business, RV, or other enclosed area seriously.

Leave the building promptly without operating electrical switches, appliances, phones, garage-door openers, or other devices that may create a spark.

Once you are safely outside and away from the suspected leak, call 911 and your propane supplier.

Do Not Use the System Again Until It Has Been Checked

A propane system or appliance involved in a suspected leak should not simply be turned back on after the odor disappears.

Have the cylinder, regulator, hose, appliance, or propane system inspected as appropriate before returning it to service.

A disappearing odor does not necessarily prove that a leak has stopped or that the system is safe to use.

Frequently Asked Questions

What should I do first if I smell propane?
Avoid flames and other ignition sources, leave the area, and call 911 from a safe location if you suspect an active gas leak.
Should I turn off the propane tank if I smell gas?
Only shut off the supply if it can be done safely without approaching a hazardous leak. If there is any doubt, leave the area and let trained professionals handle it.
Can I turn on a light if I smell propane?
No. Avoid operating electrical switches or devices in the suspected leak area because they may create a spark.
Should I call my propane company or 911?
If you believe there is an active or significant gas leak, move to a safe location and call 911. Your propane supplier should also be contacted for inspection and service.
Is a small propane smell normal?
Persistent or unexplained propane odor should not be ignored. If you are unsure whether there is a leak, stop using the equipment and have it checked.
More Propane Safety Guides

Learn how to check a propane connection for leaks using a bubble test.

You can also read how to transport propane tanks safely or learn how to tell if a propane cylinder has expired.

Need propane? Compare current local propane refill prices.

Emergency safety notice: This article provides general propane safety information and is not a substitute for instructions from emergency responders, your propane supplier, appliance manufacturers, or local authorities. If you believe there is an active propane leak or immediate danger, leave the area and call 911 from a safe location.