Smell gas? Move fast.

Raw natural gas is colorless and odorless. As a safety precaution, Alliant Energy adds a harmless odorant to the natural gas to give it the distinctive rotten egg smell. Natural gas is lighter than air, so it will rise and disperse if allowed to vent freely.

Although rare, natural gas leaks can be dangerous and result in fire, explosions, injury or death. If you suspect a leak, call 1-800-ALLIANT (800-255-4268) immediately. We will investigate for free.
man pinching nose

Learn the signs of a leak and what to do.


Signs of a leak

  • Smell the odor of rotten eggs. If you don’t know the scent, contact us for a free scratch-and-sniff card.
  • Hear hissing, roaring or whistling sounds near a gas appliance, meter or pipeline.
  • See dead or dying vegetation where the surrounding area is green.
  • Blowing dirt or bubbling water in a puddle, river, pond or creek.

Staying safe during a gas leak

Anytime you suspect a natural gas leak, you should react like it’s an emergency.

  • Leave the area immediately and evacuate everyone from the home or building.
  • Go to a remote location and call us at 1-800-ALLIANT (800-255-4268)We’ll investigate the leak for free. Do not return until we confirm it is safe.
  • If gas lines or equipment are severed, resulting in blowing gas, call 911.
  • Don’t stop to look for the leak or open windows.
  • Don’t use anything that might create a spark, such as a cell phone, light switch or garage door opener. These can ignite gases or vapors.

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Video: McKenzie the superhero

video thumbnail of a woman in a store

Selecting a carbon monoxide detector and natural gas alarm

downed lines

Report an emergency

 (Downed power line, natural gas leak, carbon monoxide alarm or other emergency)

Call us at:

1-800-ALLIANT (800-255-4268)

For emergencies, please do not use an online form or send an email.

Man calling 811

Know what's below, even in your own backyard.

Damage from digging is the most common cause of underground natural gas leaks. Remember to call 811 so you know where utility lines are buried on your property.

Visit our call 811 page
Adult and child with electric fan

Electric safety

Get information on how to stay safe around electricity.

Visit our electric safety page
School Supplies

Especially for schools

Do your school personnel know what to do in the event of a gas emergency? This training program provides critical safety information about the underground natural gas pipelines located on or near your school property.

Gas pipeline safety for schools

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