Natural Gas & Propane Safety

Our emergency line is available 24 hours a day.

Montana: 888-467-2669

South Dakota/Nebraska: 800-245-6977

In case of a life-threatening emergency, dial 911.

What to do if you smell natural gas

Get away
Leave the area immediately.
Don't create a spark
Do not use phones, matches, light switches or anything else that could trigger the ignition of the gas.
Call 911
When at a safe distance, call 911.

Keep your natural gas meter clear of snow and ice:

  • Make sure your gas meter’s regulator vent is clear of snow and ice so the flow of natural gas into the home can be regulated properly. If this vent becomes plugged, the pressure of gas flowing into the home could either increase to a dangerous level, resulting in a fire, explosion or the buildup of deadly carbon monoxide, or decrease, preventing natural gas from flowing to your gas appliances.
  • Clear snow from the meter and associated piping. Allowing a winter’s worth of snow to pile up on a meter or pipes can lead to pipes breaking, causing dangerous gas leaks.
    • Clear off your gas meter gently using your hands or a broom.
    • Never use a shovel on the meter.
  • Snow should also be cleared from the roof above the meter to prevent falling snow or ice from damaging the meter or associated piping.
  • Be sure all appliance exhaust vents are clear from blowing and drifting snow. Blocked appliance vents could result in a loss of heat or a buildup of deadly carbon monoxide in the structure.
  • If you rely on a snow removal company to clear your property, be sure they are also clearing snow and ice from your meter, and a path to your meter. If you have a seasonal property or are away on vacation, ask someone to check your natural gas meter and vents, especially after a significant storm.

Special Notice for Natural Gas Customers:

Allowing snow and ice to build up on your natural gas meter, or fall from the roof above your meter, can lead to dangerous damages.
Download the special insert for natural gas customers

Call before you dig

No project is too small. If it requires a shovel, call 811 or visit call811.com at least two full business days before you begin your project.
Learn more

Natural Gas Safety FAQs

Natural gas is a clean, safe, efficient and economical source energy. However, natural gas leaks can be deadly. Learn how to stay safe around natural gas.

After every snow, be sure to clear off your gas meter gently using your hands or a broom. Never use a shovel. Gas meters have a vent that regulates pressure. If snow piles up and covers the vent, it won’t work properly. This could lead to a service interruption or even a gas leak, which could cause a fire or explosion.

Also be sure all appliance exhaust vents are clear from blowing and drifting snow. Blocked appliance vents could result in a buildup of deadly carbon monoxide.

Visit Natural Gas Safety to learn more.

Call 911, if you notice any of these signs of a pipeline leak:
• An unusual blowing or hissing sound coming from the ground.
• Dirt or dust blowing from a hole in the ground.
• Bubbling ponds.
• Dead or discolored vegetation in an otherwise green area near a pipeline right of way.
• A fire close to a buried pipeline.

Visit Natural Gas Safety to learn more.

Make sure to keep your gas meter clear after a storm. Remove snow and ice from the gas meter, piping and regulator. This will help your gas meter work properly and allows us to access your meter easily in the case of an emergency. Please also maintain a clear path to your meter.

If ice begins to build up on your meter that you can’t brush off with your hands or a broom, please contact us at 888-467-2669 in Montana or 800-245-6977 in South Dakota/Nebraska.

Visit Natural Gas Safety to learn more.

Pipeline markers, placed at all public road and railroad crossings, show the approximate location of pipelines and identify the companies that operate them.

These markers indicate the pipeline content, the name of the pipeline operator and the operator’s emergency phone number. Even if the pipeline is marked, you must call 811 to have utility lines marked before digging. The pipeline may not follow a straight course between markers.

Visit Natural Gas Safety to learn more.

NorthWestern Energy makes it easy for you to detect natural gas leaks by adding an unpleasant rotten egg or skunk-like smell to natural gas. If you smell this odor:

  1. Get away. Leave the area immediately.
  2. Don't create a spark. Do not use phones, matches, light switches or anything else that could trigger the ignition of the gas.
  3. When at a safe distance, call 911.

Visit Natural Gas Safety to learn more.

The cost of installing the EFV will need to be evaluated by an engineer.

If you are interested, please contact your local NorthWestern Energy construction office to set up an appointment. This payment is required prior to installation of the EFV.

An EFV is intended to stop the flow of gas if the service line is severed. The EFV is placed in the service line where it leaves the gas main. An EFV will stop the flow of gas only if the service line is severely damaged. It is important to note that an EFV will not protect you from a leak or broken line inside your home, or a small leak on the line in your yard. An example of when the valve provides protection is in the event the gas service is damaged from digging or extreme ground movement.

Pipeline markers

Pipeline marker in field

Pipeline markers

Markers show the approximate location of pipelines and identify the companies that operate them. The pipeline may not follow a straight course between markers. Pipeline operators must place markers, sometimes called right-of-way markers, at public road crossings, and railroad crossings. These markers indicate the pipeline content, the name of the pipeline operator and the operator’s emergency phone number. Please note that even if the pipeline is marked, you must contact 811 for utility line locates before digging near the marker.

How to Recognize a Gas Pipeline Leak

Call 911, if you notice any of these signs of a pipeline leak:

  • An unusual blowing or hissing sound coming from the ground.
  • Dirt or dust blowing from a hole in the ground.
  • Bubbling ponds.
  • Dead or discolored vegetation in an otherwise green area near a pipeline right of way.
  • A fire close to a buried pipeline.

Pipeline Purpose and Reliability

Pipelines are the safest way to transport energy products, including natural gas, crude oil and other fuels. The U.S. Department of Transportation’s Pipeline & Hazardous Materials Safety Administration (PHMSA) regulates pipelines with the help of state partners. According to government and industry statistics, the most common cause of pipeline incidents is improper or unauthorized digging near a pipeline, which is why it’s important to call 811 before you dig. Pipeline operators carefully build, maintain and monitor the integrity and security of their lines.

Excess Gas Flow Valve Notice

If a gas service is installed to your home, you have the option to purchase an Excess Flow Valve (EFV) to be installed by NorthWestern Energy. An EFV is intended to stop the flow of gas if the service line is severed. The EFV Valve is placed in the service line where it leaves the gas main. 

 An EFV will stop the flow of gas only if the service line is severely damaged. It is important to note that an EFV will not protect you from a leak or broken line inside your home, or a small leak on the line in your yard. An example of when the valve provides protection is in the event the gas service is damaged from digging or extreme ground movement. 

 As required by the U.S. Department of Transportation (DOT), we are notifying you that an EFV that meets the minimum prescribed DOT performance standards, is available for installation on your natural gas service line.

The cost of installing the EFV will need to be evaluated by an engineer.  If you are interested, please contact your local NorthWestern office to set up an appointment.  Payment is required prior to installation of the EFV.  

Call 811 before inspecting or clearing sewer lines

In rare cases, our small-diameter gas pipeline may have inadvertently crossed through a sewer pipe. If a plumber unknowingly strikes a gas line while cutting through a sewer blockage, this could cause a dangerous release of natural gas. That’s why it’s important to call 811 before any sewer work, even if it doesn’t involve digging.

NorthWestern Energy & the Canada Montana Pipeline Company

Safety information

Clean and clear after every snowstorm

Clean and clear after every snowstorm

Allowing snow and ice to build up on your natural gas meter, or fall from the roof above your meter, can lead to dangerous damages.

Just like scraping off your car or shoveling your sidewalks, it’s important to take care of your natural gas meter after it snows. 
Visit After The Storm