Unhealthy Air Quality Index level. Red: Indexes in the 151 to 200 range are considered "unhealthy." At this level, any member of the general public becomes susceptible to health effects.

The EPA's Air Quality Index can tell you whether breathing outside air can be harmful. Here's how to read the scale to plan ...

TEMPO.CO, Jakarta - Jakarta's air quality on Wednesday, July 23, 2025, ranked second-worst in the world, according to the ...

The DEC has issued an air quality health advisory for most of upstate New York due to elevated levels of fine particulate ...

Thursday: A slight chance of showers and thunderstorms after 2 p.m. Sunny, with a high near 94. Heat index values as high as ...

The EPA's AQI ranges from 0 to 500 and represents the measurement of these five different major pollutants regulated by the Clean Air Act.

A combination of high heat, poor air quality, and the threat of severe thunderstorms is bearing down on New York City this ...

MIchigan's air quality will be unhealthy for some groups Friday. Check the air quality index map to see if it's good or bad ...

The Canadian wildfire smoke that covered northwest Wisconsin July 24 has moved south and is causing air quality problems in ...

AirNow and PurpleAir use the Air Quality Index, or A.Q.I., a measure of air quality from 0 to 500 that is composed of six categories, from “good” to “hazardous.” ...