What is the minimum acceptable oxygen level for safe entry into a confined space?

The minimum acceptable oxygen level for safe entry into a confined space is 19.5%. This standard is based on safety regulations to ensure that individuals working in such environments have an adequate amount of oxygen to breathe. The general atmospheric oxygen concentration in the air we typically breathe is about 20.9%. Levels below 19.5% indicate an oxygen-deficient environment, which can lead to impaired cognitive and physical functions and can pose a serious risk to life.

Ensuring that oxygen levels remain at or above 19.5% is critical for preventing asphyxiation and other health-related incidents associated with low oxygen levels. This threshold is widely accepted across various safety standards and regulations, emphasizing the importance of maintaining a safe atmosphere for workers entering potentially hazardous spaces.