Carbon Monoxide Poisoning

OSHA Quick Card

Protect Yourself
Carbon Monoxide Poisoning

Carbon monoxide (CO) is a colorless, odorless, toxic gas
which interferes with the oxygen-carrying capacity of blood.
CO is non-irritating and can overcome persons without
warning. Many people die from CO poisoning, usually while
using gasoline powered tools and generators in buildings
or semi-enclosed spaces without adequate ventilation.

Effects of Carbon Monoxide Poisoning

• Severe carbon monoxide poisoning causes neurologi-
cal damage, illness, coma and death.

Symptoms of CO exposure

• Headaches, dizziness and drowsiness.
• Nausea, vomiting, tightness across the chest.

Some Sources of Exposure

• Portable generators/generators in buildings.
• Concrete cutting saws, compressors.
• Power trowels, floor buffers, space heaters.
• Welding, gasoline powered pumps.

Preventing CO Exposure

• Never use a generator indoors or in enclosed or par-
tially enclosed spaces such as garages, crawl spaces,
and basements. Opening windows and doors in an
enclosed space may prevent CO buildup.
• Make sure the generator has 3-4 feet of clear space on
all sides and above it to ensure adequate ventilation.
• Do not use a generator outdoors if placed near doors,
windows or vents which could allow CO to enter and
build up in occupied spaces.
• When using space heaters and stoves ensure that they
are in good working order to reduce CO buildup, and
never use in enclosed spaces or indoors.
• Consider using tools powered by electricity or com-
pressed air, if available.
• If you experience symptoms of CO poisoning get to
fresh air right away and seek immediate medical
attention.

For more complete Information:

OSHA 3282-10N-05

Occupational
Safety and Health
Administration
U.S. Department of Labor
www.osha.gov (800) 321-OSHA