Don's Home Health Air Quality Index (AQI)
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Contents: About | AQI Reports | Reference - Sources
Air Quality Index Levels of Health Concern Numerical
Value
Lung Association Advisory
Good 0 to 50 Air quality is satisfactory, and air pollution poses little or no risk. None
Moderate 51 to 100 Air quality is acceptable; However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Unusually sensitive individuals should consider limiting prolonged outdoor exertion
Unhealthy for Sensitive Groups 101 to 150 Members of sensitive groups may experience health effects. The general public is less likely to be affected. Children, active adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion
Unhealthy 151 to 200 Some members of the general public may experience health effects; Members of sensitive groups may experience more serious health effects. Children, active adults, and people with respiratory disease, such as asthma, should avoid prolonged outdoor exertion.; everyone else should limit prolonged outdoor exertion
Very Unhealthy 201 to 300 Health alert: The risk of health effects is increased for everyone. Children, active adults, and people with respiratory disease, such as asthma, should avoid outdoor exertion.; everyone else should limit outdoor exertion
Hazardous 301 to 500 Health warning of emergency conditions: Everyone is more likely to be affected. Everyone should avoid all physical activity outdoors

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 at the EPA.

Air Quality Index (AQI) Basics An AQI value is computed for each pollutant (ground-level ozone, particle pollution, carbon monoxide, and sulfur dioxide) using standard formulas developed by EPA. The highest of these AQI values is reported as the AQI value for that day.
AQI today and tomorrow for your location | AirNow.gov

Air Quality Index - A Guide to Air Quality and Your Health


Data Sources - Reports:
N. Central California | PurpleAir.com | California Air Quality Index (AQI) and USA Air Pollution | AirVisual




Davis
AirNow.gov is a partnership of the EPA, NOAA and several other agencies to provide AQI information
It gives a 6 day forecast and ozone in addition to PM2.5
Example:

Examples:
On September 14th Air quality hit 503 near the California Oregon border.
Anything over 300 is considered hazardous by the EPA and their scale doesn't go above 500
This was the average over several hours so was not a 10 minute spike. click on image to enlarge

I left my car windows open a crack because of the 108° temperature and it was covered with ash from the fires in the morning.


The next day the smoke was blown east to the Sierra Nevada and air quality hit 573 at Mammoth Lakes North-East of the Creek fire.
A day later the air quality averaged 740 over a 2 hour period near Shaver Lake at the edge of the Creek Fire.


Terms:
AQ&U AQI CF_ATM CF_1 LRAPA PM PM2.5 PM10 ug/m3
Links - Sources:
Air Quality 101 | North Carolina Department of Environmental Quality
last updated 22 Aug 2020