CN Tower is a BGIS Blue Zone Building™

BGIS logo

The CN Tower is recognized as a BGIS Blue Zone Building™, meeting eight core health and wellness standards that create a safer, cleaner, and more supportive environment for everyone inside.

What it means to be a Blue Zone Building:

  • Regular HVAC Maintenance – Ensures consistent air circulation
  • Enhanced Air Filtration – C-POLAR™ filters capture fine particles and bioaerosols
  • Annual Air Quality Testing – Meets BGIS standards for safe CO₂ and PM2.5 levels
  • Water Infiltration & Mould Monitoring – Prevents moisture-related risks
  • Annual Drinking Water Testing – Confirms safe, clean water
  • Legionella Risk Management – Regular cooling tower inspections
  • Non-VOC Cleaning Products – 100% biodegradable and made from natural-based ingredients
  • Radon Testing – Conducted every five years for long-term safety

This recognition ensures that guests and employees benefit from a healthier, more comfortable, and environmentally responsible space - every day. Learn more here.

Sustainability

From 2006 to 2020, we achieved a 91.8% reduction in our greenhouse gas emissions, the result of careful data analysis and thoughtful planning. 

Here are just some of the ways we’ve lowered our emissions recently:

  • Retrofitted to LED lighting
  • Installed a ventilation-on-demand control system for our kitchen
  • Installed a food-digesting system to maximize our waste diversion rate
  • Upgraded to low-flow plumbing fixtures

And our work is far from done. In the coming years, we’ll be eliminating ozone-depleting refrigerants from our operations, and introducing best-practices training for energy and water conservation—and thinking up innovative ways to decrease our footprint even further!

Emissions

This bar graph shows that the CN Tower has reduced its greenhouse gas emissions by 45,792 metric tons since 2006, the equivalent of taking 9,954 cars off the road for one year.
  • A reduction of 45,792 metric tonnes of GHG emissions since 2006
  • Equivalent to taking 9,954 cars off the road for one year

Water consumption

This bar graph shows that the CN Tower has reduced its water consumption significantly since 2005—with 71 million litres of water conserved since 2015, the equivalent of 28 Olympic swimming pools.
  • A reduction of more than 71 million litres of water since 2015
  • Equivalent to 28 Olympic swimming pools

Hydro 

This bar graph shows that the CN Tower has reduced its electricity consumption by more than 59 million kilowatt hours between 2006 and 2019, the equivalent to 394 million kilometres driven by electric passenger vehicles.
  • A reduction of more than 59 million kilowatt hours since 2006
  • Equivalent to 394 million kilometres driven by electric passenger vehicles

Waste

This pie chart shows that the CN Tower diverted a total of 504 metric tonnes of waste from landfill in 2019.
  • As of May 2023, the Tower's Diversion Rate is 75.1%, exceeding our 2030 target of 75%. Our Capture Rate, a ratio that reflects the total mass of all materials diverted to reuse or recycling this year, divided by the total mass of all materials, reached 96.7%
  • A total of 504 metric tonnes of waste was diverted from landfill in 2019. Equivalent to 29 waste trucks