Drowning Damage

When a player runs out of air underwater, they begin to drown, taking approximately 2 health points of damage per second

When the player is no longer submerged in water or is in a bubble column, their oxygen regenerates at a rate of 1 bubble every 0.2 seconds (4 game ticks). Respiration equipment adds, on average, an additional 16 seconds per level. Water Breathing and Conduit Power regenerate the oxygen. In Bedrock Edition, both effects affect squid and fish.


 * 1) ↑ Damage is taken when the air supply value reaches -20. Usually, the air supply value decreases each tick. It resets to 0 after damaging. Respiration gives a chance for air supply to not decrease itself per tick. Chance is x/(x + 1), where x is the level of enchantment.
 * 2) The amount of time able to be spent underwater can be changed via the Respiration enchantment