In most places, the gold standard for air quality data is the EPA’s AirNow program It uses sensitive pollution sensors placed around the country to build an Air Quality Index, or AQI ... 201-300 is ...

This measure, based on data from the Environmental Protection Agency, evaluates states on the number of days the Air Quality Index in counties was not rated “good.” U.S. News calculated a ...

When you look at the AQI or the Air Quality Index, that's what they're measuring. That's the one that's known that can cause ...

Fine particulate matter is airborne microscopic dust and droplets smaller than 2.5 microns (PM2.5) in diameter. The composition of particulate matter depends on its source, the season and ...

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As of a result of the Air Quality Index being 165 in certain locations ... Levels may carry over to very unhealthy levels or ...

In the following California air quality map, you can see how the air quality is where you live or throughout California. This information is provided via the United States Environmental Protection ...

Your eating habits might be the thing that's keeping you up at night. Avoid these 10 foods before bed for quality sleep.

Unlock to see our ratings and compare products side by side Our comfort ratings are based on members' average comfort rating for their mattress brand and type on a scale from excellent to very ...

Purple is known for its unique mattresses. After testing each Purple mattress -- including its new line -- here are my thoughts on who would like them. A certified sleep science coach and mattress ...

The Purple Heart is awarded to military members who are injured and killed in combat, through an act of terrorism or by friendly fire. It acknowledges the physical sacrifice of service to the nation.

It comprises two measures: the number of days with an air quality index below a certain threshold and the number of violation points against drinking water systems in each state. Learn more about ...