This US EPA feature layer is updated hourly and reflects the latest hour of air quality data received from monitoring sites that report to AirNow. A brief summary of the item is not available. Add a brief summary about the item.
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Item created: Apr 2, 2019 Item updated: Nov 14, 2024 View count: 14,303,216
Description
Air Quality Index (AQI) Values | Levels of Health Concern | Colors |
---|---|---|
When the AQI is in this range: | ..air quality conditions are: | ...as symbolized by this color: |
0 to 50 | Good | Green |
51 to 100 | Moderate | Yellow |
101 to 150 | Unhealthy for Sensitive Groups | Orange |
151 to 200 | Unhealthy | Red |
201 to 300 | Very Unhealthy | Purple |
301 to 500 | Hazardous | Maroon |
Note: Values above 500 are considered Beyond the AQI. Follow recommendations for the Hazardous category. Additional information on reducing exposure to extremely high levels of particle pollution is available here. |
- "Good" AQI is 0 to 50. Air quality is considered satisfactory, and air pollution poses little or no risk.
- "Moderate" AQI is 51 to 100. Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people. For example, people who are unusually sensitive to ozone may experience respiratory symptoms.
- "Unhealthy for Sensitive Groups" AQI is 101 to 150. Although general public is not likely to be affected at this AQI range, people with lung disease, older adults and children are at a greater risk from exposure to ozone, whereas persons with heart and lung disease, older adults and children are at greater risk from the presence of particles in the air.
- "Unhealthy" AQI is 151 to 200. Everyone may begin to experience some adverse health effects, and members of the sensitive groups may experience more serious effects.
- "Very Unhealthy" AQI is 201 to 300. This would trigger a health alert signifying that everyone may experience more serious health effects.
- "Hazardous" AQI greater than 300. This would trigger a health warnings of emergency conditions. The entire population is more likely to be affected.
Air Quality Index Levels of Health Concern | Numerical Value | Meaning |
---|---|---|
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, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution. |
Unhealthy for Sensitive Groups | 101 to 150 | Members of sensitive groups may experience health effects. The general public is not likely to be affected. |
Unhealthy | 151 to 200 | Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects. |
Very Unhealthy | 201 to 300 | Health alert: everyone may experience more serious health effects. |
Hazardous | 301 to 500 | Health warnings of emergency conditions. The entire population is more likely to be affected. |
Note: Values above 500 are considered Beyond the AQI. Follow recommendations for the "Hazardous category." Additional information on reducing exposure to extremely high levels of particle pollution is available here. |
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Dashboard views: Desktop
Source: Feature Service
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Applicable: 2d
Data updated: Feb 22, 2025, 1:46 AM
Schema updated: Feb 22, 2025, 1:46 AM
Size: 0 KB
ID: 2d718d2733a74d1689d72b922c0ac4f4
Image Count: 0
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Using tiles from a cache
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Air
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AirNow, AQI, Ozone, PM, PM2.5, PM10, OAQPS, OAR, Air, United States, Canada, Mexico, O3, EPA, Environmental Protection Agency, Air Quality Index, Environment, Monitoring, Data, Air Quality, US EPA
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No acknowledgements.US EPA, Office of Air and Radiation, Office of Air Quality Planning and Standards (OAQPS)
Comments (3)
Is it possible to get the low cost sensor data in this layer as well like on the https://fire.airnow.gov/ site?
I second that request!
Is there any way to capture older data? I need data for late October/early November in Southern California.