Air quality standards for power plants aim to limit the emission of harmful pollutants into the atmosphere, thereby safeguarding human health and the environment.

Sulfur dioxide (SO₂) is a major air pollutant emitted by power plants that can cause respiratory problems and contribute to acid rain.

Ambient air quality standards define the maximum permissible levels of pollutants in the outdoor air to protect public health.

Flue gas desulfurization (FGD) systems remove sulfur dioxide from power plant emissions using a chemical process.

Continuous emissions monitoring systems (CEMS) provide real-time data on pollutant emissions, allowing for effective monitoring and enforcement of air quality standards.

Nitrogen dioxide (NO₂) is a key component of smog, which is a mixture of pollutants that can cause respiratory problems and reduce visibility.

Air pollution control refers to the technologies and practices used to reduce or eliminate pollutants from industrial emissions.

The Environmental Protection Agency (EPA) is the primary federal agency responsible for setting and enforcing air quality standards in the United States.

Emission limits specify the maximum quantity or concentration of pollutants that a power plant is allowed to emit.

Sulfur dioxide (SO₂) is a major contributor to acid rain, which can damage forests, lakes, and buildings.

Standard setting refers to the process of establishing air quality standards based on scientific research and public participation.

Particulate matter (PM), especially fine particles, can penetrate deep into the lungs and cause respiratory problems.

Retrofitting involves modifying existing power plants with pollution control technologies to reduce emissions.

Nitrogen oxides (NO_x) react with sunlight to form ground-level ozone, a major component of smog.

Prevention of significant deterioration (PSD) refers to the process of setting more stringent air quality standards for areas that meet or exceed national standards.