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 ...

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 ...

The Air Quality Index (AQI) is an index for reporting daily air quality. It tells you how clean or polluted your air is, and what associated health effects might be a concern for you. For more ...

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 ...

The data shows the Air Quality Index (AQI) on October 24, 2024, at 4 pm, and is based on an average of the past 24 hours. Tamil Nadu's Palkalaiperur has the cleanest air with a 'Good' air quality ...

Clear skies or hazardous air? Get the latest AQI insights The current AQI in Delhi on Monday 11 Nov is 408, which falls in the (401 - 500) category due to elevated levels of PM2.5 and PM10.

Scientists Examine How Wastewater Practices in Florida Keys Impact Water Quality Nov. 1, 2024 — Wastewater contains nutrients that can overfeed algae, leading to harmful algal blooms and ...

Clear skies or hazardous air? Get the latest AQI insights The current AQI in Chennai on Sunday 10 Nov is 102, which falls in the (101 - 200) category due to elevated levels of PM2.5 and PM10.

Delhi faced a thick haze and "very poor" air quality on Thursday, with AQI at 377, affecting residents' health and visibility ...

The EPA measures regional air quality index (AQI) by how hazardous it is to the general public. Discover the AQI in your city by searching below.