What is the national primary and secondary ambient air quality standard for lead?

The national primary and secondary ambient air quality standard for lead is set at 0.15 µg/m³. This standard, established by the Environmental Protection Agency (EPA), is designed to protect public health and the environment from the harmful effects of lead in the air. Lead is a toxic metal that can cause serious health problems, particularly in children, including neurological damage, developmental delays, and reduced IQ.

The standards are established based on extensive research and data that indicate the maximum amount of lead that can be present in the air without posing significant risks to human health and the environment. The chosen concentration reflects a level deemed safe for both the general public and sensitive populations, ensuring that air quality remains at a level that minimizes the risk of adverse effects from lead exposure. The specificity of these standards plays a critical role in guiding regulatory actions and ensuring compliance for air quality management.