Gas Leak or a Smell of Gas

Responding to a Gas Leak

  • Immediately call Campus Safety at 416-978-2222.
  • If you are using equipment with an open flame, turn off the flame.
  • Do not turn on or off any electrical devices such as wall light switches, computers, or laboratory equipment that might produce a spark and trigger an explosion. 
  • Pull the nearest fire alarm to notify other building occupants of the need to evacuate.  
  • Notify Facilities and Services at 416-978-3000 when it is safe to do so. 


  • Though naturally odourless, mercaptan, an odorant that smells like rotten eggs is added to natural gas to make it possible for leaks to be identified. 
  • Report all suspected gas leaks as they have the potential to result in an explosion.

Important Contacts

Emergency: 911

Campus Safety (Emergency)
St. George/UTSC: 416-978-2222
UTM: 905-569-4333

Campus Safety (Non-Emergency)
St. George: 416-978-2323
UTSC: 416-287-7398
UTM: 905-828-5200

Other Incident Response Guides

Active Attacker
Medical Emergencies
Suspicious Packages
Cyber Incidents
Power Outages
Civil Disturbances
Extreme Weather