Last updated on September 22, 2020
Los Angeles, Calif. – A new challenge for students protesting over the weekend is announced by the South Coast Air Quality Management District (AQMD) forecast, air quality will be unhealthy for sensitive individuals in Santa Clarita Valley.
“Critical functions continue including compliance and enforcement, emergency response, air monitoring, permitting, rule development, and response to public complaints. We will prioritize and expedite permit applications from businesses and organizations that are changing operations to assist with the COVID-19 response,” South Coast Air Quality Management District said in a statement.
Los Angeles County Health Officer, Muntu Davis, MD, MPH, advises people living or working in these areas with heart disease, asthma, or other respiratory diseases to minimize outdoor activities.
“Children who have sensitive conditions, including heart disease, asthma, and other chronic respiratory diseases, should not participate in outdoor physical activity and should stay indoors as much as possible,” County of Los Angeles Public Health Department said in a statement.
What is air pollution?
Air pollution is a complex mixture of gases and small particles suspended in the air. The different health effects of air pollution are dependent on how much of the pollutant is in the air, how long a person is exposed, as well as the person’s health conditions, age, and genetic background. Children, elderly people, and people with certain health conditions, such as diabetes, heart or lung disease, are more sensitive to the health effects of air pollution.
In California, “smog” is primarily driven by two pollutants: particulate matter (PM) and ozone. This table provides information on these two pollutants:
|Particulate Matter (PM)||Ozone|
|Type of pollutant||Small particles||Gas|
|Where does it come from?||Combustion sources: cars, trucks, trains, ships, aircraft, certain types of facilities, meat cooking, residential wood burning, wildfires. Natural sources: dust storms. Much of the PM2.5 in the inland regions are formed from several pollutants mixing or reacting in the air.||Ozone is formed when several gaseous pollutants react in the presence of sunlight. Most of these gases are emitted from mobile sources.|
|Is it visible?||Yes, but only at very high levels||No|
|What are the main health effects?||Cardiovascular and respiratory||Respiratory|
|What are the most affected areas?||Areas near major roadways, ports, railyards, and other combustion sources. Inland areas and valleys.||Inland areas and valleys|
While air quality has improved tremendously in our region over the past few decades, the South Coast and Salton Sea air basins continue to have days where pollutants can reach unhealthy levels. The time of the day or year and weather conditions can significantly affect the pollutant levels at a particular day and time. The South Coast Air Quality Management District provides information on how to check the current air quality, predictions for future air quality, and what actions you can take, depending on the conditions.
How can I check the Air Quality in my area?
The Air Quality Index (AQI) was developed to help translate data collected from air pollutant monitoring stations into a scale. The AQI is a number that ranges from 0 to 500 which indicates how clean or polluted the air is, and what associated health effects might be of concern to diverse individuals within a population. The AQI focuses on health affects individuals may experience within a few hours or days after breathing polluted air. The higher the AQI value, the greater the level of air pollution, and the greater the health concern.
The AQI is divided into six categories and each category is assigned a color to help visualize the information on the Current AQI map. Type your address in the box in the upper left-hand corner of the Current AQI map (www.aqmd.gov/aqimap) and match the color to the legend.
|Good (0 to 50).||Air quality is considered satisfactory, and air pollution poses little or no risk.|
|Moderate (51 to 100).||Air quality is acceptable; however, unusually sensitive people should consider limiting prolonged outdoor exertion.|
|Unhealthy for Sensitive Groups (101 to 150).||The following groups should limit prolonged or heavy outdoor exertion: People with heart disease, pregnant women, children and older adults, people with lung disease, such as asthma|
|Unhealthy (151 to 200).||Everyone may begin to experience some adverse health effects (e.g. difficulty breathing and throat irritation), and members of the sensitive groups may experience more serious effects. The following groups should avoid prolonged time outdoors: People with heart disease, pregnant women, children, and older adults, people with lung disease, such as asthma.|
|Very Unhealthy (201 to 300).||This would generate a health alert suggesting that everyone may experience more serious health effects. The following groups should avoid all outdoor physical activity: People with heart disease, pregnant women, children and older adults, people with lung disease, such as asthma. Everyone else should avoid prolonged or heavy outdoor activities.|
|“Hazardous” (greater than 300).||This would trigger health warnings of emergency conditions. The entire population is more likely to be affected. Everyone should avoid all physical activity outdoors.|
The AQI, its calculation, and pollutants are also monitored by the Environmental Protection Agency (EPA)’s Air Quality Index (AQI) and reports on the basics with color charts to help understand pollution density.