A Conversation for The Hazards of SCUBA

Oxygen toxicity

Post 1

Andrew Knight

Oxygen does not become toxic at the equivalent of 100%. The partial pressure of oxygen recommended by PADI is 1.4ppO2 or 140% equivalent but a working ppO2 of 1.6 is fine. This means that a diver can go down to 67 metres before oxygen becomes toxic. There is also some evidence to show that divers can gain a certain amount of tolerance to oxygen making it possible to dive to greater depths on air.

Andrew Knight 614920 OWSI


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Oxygen toxicity

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