National Emissions Inventory
NEI
A comprehensive EPA database that estimates air emissions of criteria and hazardous pollutants from every kind of source—industrial, mobile, and natural.
Related terms
Toxics Release Inventory An EPA database of self-reported releases of specific toxic chemicals to air, water, and land by industrial facilities. Hazardous Air Pollutants Also called air toxics. A group of 187+ chemicals known or suspected to cause cancer, birth defects, or other serious health problems—regulated separately from criteria pollutants. Criteria Pollutants The six common air pollutants regulated under NAAQS: ground-level ozone, particulate matter, carbon monoxide, lead, sulfur dioxide, and nitrogen dioxide.