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Depends on whether you mean how deep or how far just beneath the surface, and if it's with breathing gear or by simply holding their breath. W/o breathing gear it's not really the water that sets the limit, but eventually the lack of oxygen. Lumping it all together staying shallower than 10 meters and shorter than one minute should be reasonably safe. If you're diving with breathing gear there are charts and computers that'll tell you what the safe limits are, but shallower than 10 meters is fairly safe even for that.
What else can I help you with?
When water become dangerous?
Yes and no. Water can be dangerous if there are really big waves. Water can be safe if you are with someone.
Can a water spout kill a person?
Yes, a water spout can be dangerous and potentially deadly if a person is struck by flying debris or is swept up by strong winds and waves. It is important to stay away from water spouts and take precautions during severe weather conditions.
Why is it dangerous to be wet or in water if you are handling electrical devices?
Water, when in contact with electricity, conducts the electricity to spread throughout the water instantly cause major electricity flow throughout the water. Water conducts electricity making it dangerous.
When is brimming water dangerous?
'Brimming water' is the state water is in when it is about to spill over the boundaries of a river, lake or dam. It is dangerous in this state because it is about to cause a flood onto dry land.
What is post-immersion collapse?
Post-immersion collapse, also known as "shallow water blackout," is a sudden loss of consciousness that can occur after a person has been freediving or breath-holding underwater. It is often caused by hyperventilation before diving, which can lead to a decrease in blood oxygen levels without the diver realizing it. This can result in a blackout, which can be dangerous or fatal if it happens while the person is still underwater.
What is thinner than water, yet can drown you if you stay under it for too long?
Quick answer: A person can drown in quicksand, which is thinner than water but can still be dangerous if someone stays under it for too long.
How dangerous is it to come up to fast from 50 feet under water?
It's very dangerous because there is no Oxigen
Can a person breath under water?
no they can't
How far can you fall into water before it becomes dangerous?
The height from which you fall into water can be dangerous if it is more than 50 feet, as the impact can cause serious injuries or even death.
How do you fix cloudy water in toilet and washing machine and i have a well?
If cloudy water exists when a person has their own well, perhaps a water softener should be installed to help clear up the water. A person can try a small water softener under the sink for a few days to see if this clears up the water before purchasing.
How long can polar bears stay in water for before they die?
They can stay under water for 15 to 20 minutes before they drown.
Is wild water kingdom in canada a dangerous place?
Yes it is. Someone I know recieved a concushion there one time and was told that someone had their neck broken the week before. That person I know also knew someone that had the same concusion on the same slide as that person I knew did.
What is a person who swims under deep water called?
A scuba diver.
What the name of person that diving under water with a breathing tube?
diver
Are water pills over the counter dangerous?
Over the counter water pills, just like all other over the counter pills can be dangerous. You should always talk you your doctor before starting any medications.
How do you know if a person drowned or died before drowning?
If a person drowned, their lungs would be full of water because they breathed in the water. But if they died before drowning then their lungs would not be full of water as they wouldn't have breathed it in because they are dead.
How long can a human last without water?
A person can go for about 3 days without water until the serious and dangerous effects of dehydration begin to set in.
