What Are National Ambient Air Quality Standards (NAAQS)?
The NAAQS are standards established by the EPA under the CAA to protect public health and the environment. These standards are set for six principal pollutants, known as "criteria pollutants": ozone, particulate matter, carbon monoxide, nitrogen oxides, sulfur dioxide, and lead. Each of these pollutants has known health effects, and the standards are based on the latest scientific evidence to prevent harmful exposure.
