At the summit of Mount Everest, oxygen levels are about 33% of what we breathe at sea level.

In many confined spaces, oxygen levels can drop below 19.5%, which is oxygen deficient and immediately dangerous!
 
And here’s the critical part:
You don’t have to be 29,000 feet in the air to experience oxygen deprivation.
It can happen in tanks, vaults, silos, pits, and other enclosed work areas.
 
⚠️ Oxygen-deficient environments:
• Can’t be seen
• Can’t be smelled
• Can’t be felt — until it’s too late
 
That’s why atmospheric testing, ventilation, and proper confined space procedures are essential. Every single time!
Safety isn’t optional. It’s survival.