Weather conditions can influence air quality and the impact of the Masters could be more or less pronounced depending on ...

Kilometers above the Earth’s surface, the ozone layer protects humanity and all life from the sun’s harmful ultraviolet rays.

Poor air quality has prompted officials to issue an ozone high pollution advisory for Maricopa County through Thursday.

Cities in California, Texas, and Arizona are expecting air quality to become unhealthy for sensitive groups on Thursday.

Ground-level ozone is a major air pollutant that shortens human lives and kills thousands each year, resulting in major ...

Poor air quality expected in Houston Thursday ahead of a cold front. Experts advise limiting outdoor time, especially for ...

Residents of Houston and surrounding areas are being urged to limit emissions on Wednesday due to air quality concerns.

An Air Quality Advisory has been issued for portions of Houston on Wednesday. Here’s what this means and what you can do to ...

The Maricopa County Air Quality Department said the levels are expected to exceed the federal health standard for ozone.

The decision bought officials time to avert economic harm, but raised concern from health advocates about the continued impacts of ozone on Arizonans.

The move will give state regulators more time to develop a plan to improve air quality in metro Denver and the region, and to ...