Natural gas odor indoors: steps to protect your household

A natural gas smell inside a home requires immediate attention. Utility gas is naturally odorless, so suppliers add a sulfur-like odorant that may smell like rotten eggs. Even a faint odor can indicate a leaking appliance, damaged gas line, or unsafe connection.

Treat the situation as an emergency until professionals determine the source. Do not try to locate the leak, repair a fitting, or identify the problem with a flame. Quick, calm action helps protect your household and nearby properties.

The City of Susanville Public Works Department supports safe, reliable utility services and public infrastructure. Residents should also know how to respond when a gas odor occurs in a house, apartment, garage, or other enclosed space.

Recognize the warning signs

The strongest warning sign is a distinctive sulfur or rotten-egg smell. You may also hear hissing near a gas appliance, meter, pipe, or wall. A damaged underground line can sometimes cause bubbling water, dying vegetation, or a visible disturbance in soil outside.

Natural gas can collect in enclosed or poorly ventilated areas. Odor intensity may vary, and some people may not detect the smell at all. Children, older adults, and pets may show unusual symptoms before an odor is noticed.

Headache, dizziness, nausea, confusion, weakness, or unusual sleepiness can indicate exposure to gas or carbon monoxide. Carbon monoxide itself has no smell. If anyone has symptoms, move everyone into fresh air and call 911 from a safe location.

Leave without creating a spark

Do not turn lights on or off, plug in a device, adjust a thermostat, ring a doorbell, or use a landline telephone inside the building. Avoid matches, candles, lighters, cigarettes, and anything with an open flame. Do not start a vehicle in an attached garage.

Alert everyone nearby using your voice if possible, then leave immediately. Do not stop to search for the source, gather belongings, open windows, or shut off appliances. If a door or window is directly along your exit path and can be opened without touching electrical controls, leave it as you go; never delay evacuation for ventilation.

Move well away from the building and any outdoor gas equipment. Keep other people and pets from entering the area. Do not use a mobile phone until you are safely outside and away from the odor.

Call for emergency assistance

Once you are at a safe distance, call 911 if the odor is strong, anyone feels ill, you hear escaping gas, or there is any possibility of fire or an explosion. Contact the gas utility’s emergency line from outside as well. Use the emergency number printed on your utility bill or the provider’s official website rather than relying on an unverified number.

Tell the dispatcher where you are, what you noticed, whether anyone has symptoms, and whether the smell is inside, outside, or near a meter. Follow instructions from firefighters, police officers, and utility crews. They may need to shut off service, inspect appliances, or evacuate neighboring properties.

Never assume the odor has disappeared because it becomes weaker. Air movement can disperse gas temporarily while the leak remains. Do not return until emergency personnel or the gas utility specifically says it is safe.

Situation	Immediate action	Avoid
Strong odor inside	Evacuate and call 911 from outside	Searching for the leak
Mild or intermittent odor	Leave the area and report it as a potential leak	Ignoring it or waiting overnight
Hissing near a pipe or appliance	Move away and contact emergency responders	Touching valves or fittings
Symptoms such as dizziness or nausea	Get into fresh air and call 911	Re-entering to help someone without direction
Odor near a street or meter	Keep people away and report the location	Using a vehicle or ignition source nearby

Do not operate gas equipment

After the area has been cleared, do not relight a pilot light, reset a furnace, test a stove, or restore gas service yourself. A licensed professional or utility representative must inspect the system and confirm that appliances, connectors, meters, and lines are safe.

Do not turn the gas shutoff valve unless emergency responders or the gas utility instruct you to do so and you can reach it without entering a hazardous area. Trying to manipulate equipment during a suspected leak can create sparks or worsen the release.

If a contractor recently worked on plumbing, heating, or an appliance, mention that information to the responding crew. Keep records of inspections and repairs, and replace damaged flexible connectors or aging equipment only through qualified professionals.

Prevent future gas emergencies

Schedule professional inspections for furnaces, water heaters, ranges, fireplaces, and other fuel-burning appliances. Keep vents and exhaust flues clear of snow, storage items, nests, and debris. Never use a gas oven or outdoor grill to heat a home.

Install carbon monoxide alarms near sleeping areas and on each level, following the manufacturer’s placement and testing instructions. Replace batteries and alarm units according to the product guidance. Carbon monoxide alarms supplement safe equipment maintenance; they do not detect a natural gas leak.

Store combustible materials away from heaters and utility equipment. Paints, solvents, fuels, and other chemicals should be handled and discarded correctly; residents can review hazardous waste guidance before taking unwanted products to an approved disposal location.

Keep access routes clear

Emergency crews need a clear path to homes, meters, hydrants, and streets. Do not block utility equipment with vehicles, construction materials, landscaping, or stored items. Report damaged public infrastructure after the immediate gas emergency has been addressed, especially if a broken sidewalk or obstruction could slow evacuation or create a trip risk; the City explains how to report a sidewalk hazard.

Residents organizing neighborhood gatherings should also account for emergency access. A block party, street closure, tent, or temporary activity must not obstruct response vehicles or utility crews, and the City’s special event permit information can help organizers plan responsibly.

Keep your utility account information and emergency contacts accessible, but do not remain indoors to find paperwork during a gas incident. Save important numbers in your phone and keep a printed copy in a safe location outside the home.

If you smell natural gas, act immediately: warn others, leave the building, move away, and call 911 or the gas utility from a safe place. Follow official instructions, stay out until clearance is given, and report infrastructure concerns through the City of Susanville Public Works Department after the emergency is under control.