The United States Environmental Protection Agency (EPA) defines air pollution as “any visible or invisible particle or gas found in the air that is not part of the natural composition of air.”
Air pollution comes from many different sources – some are man-made and some are naturally occurring. Air pollution includes gases, smoke from fires, volcanic ash and dust particles.
Research shows that air pollution can worsen asthma symptoms. A study of young campers with moderate to severe asthma showed they were 40 percent more likely to have acute asthma episodes on high pollution summer days than on days with average pollution levels.
Another study found that older adults were more likely to visit the emergency room for breathing problems when summer air pollution was high.
Ozone, a gas, is one of the most common air pollutants. Ozone contributes to what we typically experience as "smog" or haze. It is most common in cities where there are more cars. It is also more common in the summer when there is more sunlight and low winds.
Ozone triggers asthma because it is very irritating to the lungs and airways. It is well known that ozone concentration is directly related to asthma attacks. It has also caused the need for more doses of asthma drugs and emergency treatment for asthma. Ozone can reduce lung function. Ozone can make it more difficult for you to breathe deeply.
Other forms of air pollution may also trigger your asthma. Small particles in the air can pass through your nose or mouth and get into your lungs. Airborne particles, found in haze, smoke and airborne dust, present serious air quality problems. People with asthma are at greater risk from breathing in small particles. The particles can make asthma worse. Both long-term and short-term exposure can cause health problems such as reduced lung function and more asthma attacks.
The EPA reports air pollution levels using the Air Quality Index (AQI). AQI reports the level of ozone and other air pollutants. When the AQI is 101 or higher, it is dangerous for people with asthma. You may have to change your activities and medicines. If you have asthma, your symptoms can worsen even when ozone levels are moderate (AQI 51-100).
Many local weather forecasts warn the public about high air pollution days. You can find this information anytime at AirNow.gov.
Throughout the United States, when air pollution is high, we have AirNow Action Days. These forecast high air pollution days with unhealthy air. During Action Days, people with asthma should limit their time outdoors, especially from 11 a.m. to 8 p.m. Stay in a well-ventilated, preferably air-conditioned, building. Most of all, do not exercise outdoors on Action Days.
Yes, but your concern should be appropriate to the type of environment you work in. If you work with certain chemicals, sprayed substances, powders or known carcinogens or allergens, your risk may be high. Occupational Health and Safety Administration (OSHA), the EPA of the workplace, requires your employer to reduce your risk.
Even if you work in what seems to be a chemical-free environment, you may have exposure to indoor or outdoor air pollution. No matter how old the building is, there may be hidden indoor air pollution. Buildings may have mold spores or cockroaches. These are both powerful allergens. Dust mites are in most indoor areas. New carpet may release toxic fumes. Poorly filtered air systems may spread allergens and irritants. If they are damp, they may actually breed mold spores. If your employer allows tobacco smoking in the building, smoke may pollute the air you breathe.
Yes. Your home might even be a “high priority public health risk.” This is probably where you are exposed to most allergens and irritants.
Home is where you cook, eat, sleep, bathe, groom, relax and play with pets. Indoor air pollution can pose a health risk. Your home may have small particles in the air or damaging gases such as carbon monoxide.
Sources of indoor air pollution include:
To reduce your home’s indoor air pollution:
Medical Review October 2015.