As per AQI classification, a reading between 0 and 50 is 'good', 51 to 100 'satisfactory', 101 to 200 'moderate', 201 to 300 ...

Clean air advocates are pushing back against the Trump administration’s move to force utility companies to keep operating ...

The agency plans to analyze the cost-benefit of PM2.5 and ozone regulation without using a dollar value for lives saved.

A recent study from Oregon Health and Science University found common air pollutants can alter adolescent brain development.

A recent analysis of satellite data showed a substantial decline in methane emissions associated with oil and gas development ...

The developers of a new data center in Surprise are bringing their own power, and neighbors of the project say it's a threat.

On Friday at 4:51 p.m. an updated freezing fog advisory was issued by the National Weather Service in effect until Saturday ...

Fighting air pollution is not only good for our lungs, but also good for the health of Arizona's economy. Reduced idling, ...

While lawmakers look to fast-track funds to address Tijuana River pollution, another sewage infrastructure failure in Mexico compounds the crisis.

The EPA’s rejection of Colorado’s regional haze plan and orders from the Trump administration to keep coal plants online in ...

Fighting air pollution is not only good for our lungs, but also good for the health of Arizona's economy. Reduced idling, increased testing are key.