If You Smell Gas at Home: What to Do, Step by Step

Gas is a safe, common fuel when it is contained in its pipes and appliances. When it is not, the right move is simple and the same every time: get everyone out of the building, and call for help from somewhere safe. This guide walks through exactly what that looks like. It is written to be read now, so that if you ever need it, you already know the plan.

How gas gives itself away

Natural gas and propane have almost no smell on their own. The supplier adds an odorant on purpose so that a leak is easy to notice. Most people describe it as rotten eggs or sulfur. Other signs of a leak can include a hissing or whistling sound near a gas line or appliance, bubbles in standing water near a gas line outdoors, or dead patches in a lawn along a buried line.

A faint smell can be harder to place. Gas appliances can give off a brief whiff when a burner lights, and that is different from a steady smell that lingers. If you are unsure, treat the smell as real. It is never wrong to leave and check.

Step one: leave right away

If you smell gas, stop what you are doing and go outside. Take everyone with you, including children and pets, and do it without delay. Do not spend time hunting for the source, opening windows or trying to fix anything. The goal is distance from the building.

On your way out, do not flip any switch or turn anything on or off. That includes lights, fans, garage door openers and thermostats. Switches can create a tiny spark, and a spark in a gas-filled space is the one thing you want to avoid. If a light is already on, leave it on. If the door is on your way out, leaving it open is fine, but do not stop to ventilate.

Step two: no flames, no sparks, no phone inside

Keep every ignition source away. No lighters, no matches, no candles, no cigarettes. Do not start a vehicle in an attached garage. Do not use a landline or cell phone while you are still inside the house. Wait until you are outside and away from the building.

Step three: call from a safe place

Once you are outside and a good distance from the house, call your gas utility's emergency line, or call 911 if you are not sure of the number or if anyone feels unwell. Tell them your address, what you smelled, and whether everyone is out. Stay on the line if they ask you to.

If you use propane, the number for your supplier is usually printed on the tank or on your invoice. It is worth writing the number somewhere you can find it quickly, like the refrigerator door.

• Leave immediately with everyone in the house, pets included.
• Do not switch anything on or off on the way out.
• Keep flames, lighters and sparks away from the building.
• Call the gas utility or 911 from outside, away from the house.
• Do not go back in until the utility or the fire department says it is safe.

Step four: stay out until it is cleared

Do not go back in for a wallet, a phone or a pet. The responders will check the building with proper instruments, find out where the gas is coming from, and tell you when it is safe to enter. That decision belongs to them, not to you, and not to the smell. Gas can remain in a space even after the odor seems to have faded.

What happens after: repair and reconnection

Once the emergency is handled, the leak still has to be fixed. The utility may shut off service at the meter, and the problem is usually traced to a specific appliance, valve, fitting or section of pipe. A contractor repairs or replaces the faulty part, tests the connection, and reconnects the appliance. Gas service is typically restored once the problem has been addressed.

Do not try to repair gas lines or relight appliances yourself after a leak. A gas repair needs the right tools and the right testing, and the margin for error is thin. Your job is to stay safe and make the calls. The repair is for a qualified contractor.

Master Mechanical is a locally owned and operated company in Spring Hill, Tennessee, and gas service is one of the trades it handles alongside heating and air, plumbing and electrical. After a leak has been cleared by the utility or fire department, you can reach the crew at (615) 562-2525 to talk through the repair.