Emission Factor and Inventory Group, Technology Transfer Network, U.S. Environmental Protection Agency

Data Center Description
The U.S. Environmental Protection Agency (EPA) Clearinghouse for
Inventories and Emission Factors (CHIEF) provides a mechanism of
exchanging information on air pollution control matters between
federal, state, and local agencies, private citizens, universities,
contractors and foreign governments. The CHIEF maintains air pollution
emission factors and criteria for six major pollutants (particulates
(PM-10), SO2, CO, NOx, VOC, and lead) and toxic substances from
stationary and mobile sources.