Understanding Carbon Monoxide Poisoning: Risks, Safety Tips, and Symptoms
In recent years, the popularity of carbon monoxide (CO) alarms has increased; however, many people remain unaware of the dangers of carbon monoxide poisoning in the home. Commonly referred to as the "invisible killer," CO is an odorless, colorless gas that forms when fuels—such as gasoline, wood, coal, natural gas, propane, oil, and methane—burn incompletely. In residential settings, potential sources of carbon monoxide include heating and cooking equipment that rely on fuel. Additionally, vehicles or generators running in an attached garage can lead to hazardous levels of CO.
Carbon Monoxide Facts
The dangers associated with CO exposure vary according to several factors, including the individual's health and activity level. Vulnerable populations, such as infants, pregnant women, and individuals with respiratory or heart conditions (like emphysema, asthma, and heart disease), can experience more severe effects from lower concentrations of CO than healthy adults.
Exposure to CO can occur in two ways: prolonged exposure to small amounts or short-term exposure to high gas levels. According to the National Fire Protection Association (NFPA), local fire departments responded to approximately 79,600 carbon monoxide incidents in 2016, averaging nine calls per hour. This statistic does not account for the 91,400 CO alarm malfunctions and 68,000 unintentional CO alarms reported that year. Data from the Centers for Disease Control and Prevention (CDC) indicates that 399 people died from unintentional, non-fire carbon monoxide poisoning in 2017.
Safety Tips
To minimize the risk of carbon monoxide poisoning, follow these safety tips:
1. Install CO Alarms: Place alarms in a central location outside each sleeping area and on every level of the home. For optimal protection, interconnect all alarms so that when one sounds, they all do.
2. Follow Manufacturer Instructions: Always adhere to the guidelines for placement and mounting height of CO alarms.
3. Select Approved Alarms: Choose a CO alarm that bears the label of a recognized testing laboratory.
4. Know How to Respond: Contact your local fire department's non-emergency number for guidance on what to do if the CO alarm activates.
5. Test Alarms Regularly: Check CO alarms at least once a month and replace them according to the manufacturer's recommendations.
6. Address Trouble Signals: If the alarm emits an audible trouble signal, check for low batteries. Call the fire department if replacing the battery does not stop the sound.
7. React Quickly: If the CO alarm sounds, immediately move to a fresh-air location outdoors or by an open window or door. Ensure everyone in the home is accounted for and call for help from the fresh-air location. Remain there until emergency personnel arrive.
8. Exercise Caution with Vehicles: When warming up a vehicle, remove it from the garage right after starting it. Never run a car or engine indoors, even with garage doors open. Ensure that the exhaust pipe of a running vehicle is not blocked by snow. Do not leave a car running outside unattended to prevent theft.
9. Clear Vents: During snowstorms, ensure that vents for the dryer, furnace, stove, and fireplace are clear of snow build-up.
10. Proper Generator Use: When using a generator, place it in a well-ventilated outdoor location, away from doors, windows, and vents.
11. Use Grills Outside Only: Remember that gas or charcoal grills produce CO and should only be used outdoors.
Symptoms of Carbon Monoxide Poisoning
CO enters the body through breathing and can mimic the symptoms of other illnesses, such as flu or food poisoning. Symptoms of CO poisoning include:
- Shortness of breath
- Nausea
- Dizziness
- Light-headedness
- Headaches
High levels of CO exposure can be fatal, leading to death within minutes. The concentration of CO, measured in parts per million (ppm), significantly affects symptom severity in healthy adults:
- **50 ppm**: No adverse effects after 8 hours.
- **200 ppm**: Mild headache after 2-3 hours.
- **400 ppm**: Headache and nausea after 1-2 hours.
- **800 ppm**: Headache, nausea, dizziness after 45 minutes; collapse and unconsciousness after 1 hour.
- **1,000 ppm**: Loss of consciousness after 1 hour.
- **1,600 ppm**: Headache, nausea, dizziness after 20 minutes.
- **3,200 ppm**: Headache, nausea, dizziness after 5-10 minutes; collapse and unconsciousness after 30 minutes.
- **6,400 ppm**: Headache and dizziness after 1-2 minutes; unconsciousness and danger of death after 10-15 minutes.
- **12,800 ppm**: Immediate physiological effects, unconsciousness, and risk of death after 1-3 minutes.
By staying informed and adhering to safety recommendations, you can help protect yourself and your loved ones from the risks associated with carbon monoxide poisoning.
**Source**: NFPA's Fire Protection Handbook, 20th Edition.