Air Quality Standards are regulations set by governments to protect public health and the environment from harmful air pollutants. These standards define acceptable levels of specific pollutants, such as particulate matter, nitrogen dioxide, and ozone, ensuring that air quality remains safe for everyone. These standards are based on scientific research and are regularly reviewed to reflect new findings. Agencies like the Environmental Protection Agency (EPA) in the United States monitor air quality and enforce these standards, helping to reduce pollution and improve overall air quality in communities.