Technology Transfer Network
Clearinghouse for Inventories & Emissions Factors
SPECIATE Version 4.4
|SPECIATE Data||Documentation||Related Data|
SPECIATE is the EPA’s repository of volatile organic gas and particulate matter (PM) speciation profiles of air pollution sources. Among the many uses of speciation data, these emission source profiles are used to: 1) create speciated emissions inventories for regional haze, PM, greenhouse gas (GHG), and photochemical air quality modeling; (2) estimate hazardous air pollutant (HAP) and toxic air pollutant (TAP) emissions from PM and organic gas primary emissions; (3) provide input to the Chemical Mass Balance (CMB) receptor model; and, (4) verify profiles derived from ambient measurements by multivariate receptor models (e.g., factor analysis and positive matrix factorization). The SPECIATE 4.4 replaces SPECIATE 4.3, SPECIATE 4.2, SPECIATE 4.0, and SPECIATE 3.2. It includes 5,728 profiles for PM, volatile organic gas, and other gases profiles.
For more information on SMOKE-ready data versions of these data and links to resources for modeling chemical mechanism, please go to the EMCH speciation page.