Air Quality Index Caution Guide

OZONE CAUTIONARY STATEMENT GUIDE
Air Quality Index	Cautionary Statements	Air Quality Index (AQI) An AQI of 100 corresponds to EPA's air quality standard	Ozone Concentration (parts per million) 8-hour average unless noted
Good	No health impacts are expected when air quality is in this range.	0 to 50	0.0 to 0.064
Moderate	Unusually sensitive people should consider limiting prolonged outdoor exertion.	51 to 100	0.065 to 0.084
Unhealthy for Sensitive Groups	Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion.	101 to 150	0.085 to 0.104
Unhealthy	Active children and adults, and people with respiratory disease, such as asthma, should avoid prolonged or heavy outdoor exertion; everyone else, especially children, should limit prolonged outdoor exertion.	151 to 200	0.105 to 0.124 [8-hr] or 0.165 to 0.204 [1-hr]
Very Unhealthy	Active children and adults, and people with respiratory disease, such as asthma, should avoid all outdoor exertion; everyone else, especially children, should limit outdoor exertion.	201 to 300	0.125 to 0.374 [8-hr] or 0.205 to 0.404 [1-hr]
Hazardous	Everyone should avoid all outdoor exertion.	301 to 500	0.405 to 0.604 [1-hr]
Sensitive Groups: When the Ozone AQI exceeds 100 the sensitive groups most at risk are children and people with asthma.

PM10 CAUTIONARY STATEMENT GUIDE
Air Quality Index	Cautionary Statements	Air Quality Index (AQI) An AQI of 100 corresponds to EPA's air quality standard	PM10 Concentration (micrograms per cubic meter) 24-hour average unless noted
Good	No health impacts are expected when air quality is in this range.	0 to 50	0 to 54
Moderate	No health impacts are expected when air quality is in this range.	51 to 100	55 to 154
Unhealthy for Sensitive Groups	People with respiratory disease, such as asthma, should limit outdoor exertion.	101 to 150	155 to 254
Unhealthy	People with respiratory disease, such as asthma, should limit outdoor exertion.	151 to 200	255 to 354
Very Unhealthy	People with respiratory disease, such as asthma, should avoid any outdoor activity; everyone else, especially the elderly and children, should limit outdoor exertion.	201 to 300	355 to 424
Hazardous	Everyone should avoid any outdoor exertion; people with respiratory disease, such as asthma, should remain indoors.	301 to 500	425 to 604
Sensitive Groups: When the PM10 AQI exceeds 100 the sensitive groups most at risk are people with respiratory disease.