Mohave County
Department of PUBLIC HEALTH
700 W. Beale Street, Kingman AZ

Carbon Monoxide and Boating

Summertime:
Boating, fresh air and cool water.
Invisible but dangerous carbon monoxide couldn't be a threat here...or could it?

What is carbon monoxide?
Carbon monoxide, or CO is a poisonous gas that is produced during combustion and burning gasoline and diesel fuel.  Carbon monoxide is odorless and colorless so it is difficult to tell if you are being exposed.

Do watercraft emit carbon monoxide?
Yes.  Boats and other watercraft emit a great deal of carbon monoxide in the exhaust unless they have emission control equipment - most watercraft do not have emission controls.

Is it dangerous?
Yes - it's deadly.  Carbon monoxide interferes with your body's ability to use oxygen.  Exposure to low levels can cause health symptoms like headache, dizziness and loss of concentration.  Exposure to carbon monoxide can also make you lose consciousness.  Losing consciousness around water can be deadly due tot he risk of drowning.

Is carbon monoxide a problem around watercraft?
Yes.  Anybody who spends any time at all near the rear end of a boat can be exposed to too much carbon monoxide.  Carbon monoxide poisoning is commonly found in people who have spent time near the back of moving and idling boats.  There have been people who have drowned because of carbon monoxide poisoning from boat exhaust.

Common symptoms of carbon monoxide poisoning:
The most common symptoms of carbon monoxide poisoning are:

*     
 headache
*     
dizziness
*     
weakness
*     
nausea
*     
vomiting
*     
chest pain
*     
confusion

High levels of carbon monoxide ingestion can cause:
*     
loss of consciousness
*     
death

Unless suspected, carbon monoxide poisoning can be difficult to diagnose because the symptoms mimic other illnesses.

How can I avoid carbon monoxide poisoning while boating?

Taking a few simple precautions will prevent carbon monoxide poisoning:
*     
stay away from boat exhaust
*     
keep your boat motor off at all times while you are docked
*     
never allow your boat motor to idle in order to run appliances like radios
*     
avoid crowded areas where lots of boats congregate if some of the boats are idling

 Boat exhaust can flow back into the rear of the boat.  Carbon monoxide tends to build up above the water near - the amount of carbon monoxide can reach life-threatening concentrations on and near swim decks.

 What do I do if I think someone has CO poisoning:
If you think someone on your watercraft has carbon monoxide poisoning, move him or her to fresh air quickly and contact your nearest emergency services.

Carbon Monoxide Brochure

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