For which depth is nitrogen narcosis typically a concern?

Nitrogen narcosis is a condition caused by the intoxicating effects of nitrogen when breathing compressed air at depth. The phenomenon becomes more pronounced as a diver descends deeper, typically becoming a significant concern at depths greater than 100 feet. At these depths, the partial pressure of nitrogen increases, which can lead to symptoms similar to those of being intoxicated, impairing judgment, coordination, and overall cognitive function.

While nitrogen narcosis can technically occur at shallower depths, it is generally not a significant issue until reaching about 100 feet or more. This understanding is critical for divers, as it emphasizes the need for heightened awareness and caution when planning dives that may exceed this depth.