Air quality monitors from the Environmental Protection Agency are often used to guide policy and public health initiatives and urban planning across the country. However, they are disproportionately ...

The EPA's Air Quality Index (AQI) for Topeka reached 143, categorized as "unhealthy for sensitive groups." The high AQI was likely caused by windblown dust from a passing frontal boundary.

Instead, the U.S. air quality index looks at five pollutants regulated under the Clean Air Act: ground-level ozone, ...

Here's what to know about air quality indexes in Oklahoma. The Air Quality Index is the Environmental Protection Agency's (EPA) tool for communicating about outdoor air quality and how healthy it ...