Emissions Certification DatabaseEntry ID: EPA0154
Abstract: The "Emissions Certification Database" contains emissions data on regulated
pollutants (hydrocarbons, carbon monoxide, and oxides of nitrogen) from certain
types of motor vehicles (automobiles and small trucks). Measurements are based
on exhaust gases measured at the tailpipe. The measurements are taken by the
USEPA's Office of Mobile Sources, and the vehicles represent all new domestic
and ... imported consumer vehicles introduced into the United States nationally.
Test vehicles are selected based on the likelihood of being worst-case
emitters. Each type of engine is tested once per year. The Emission
Certification Database verifies emissions information supplied by manufacturers
and is required under the Clean Air Act. The information is primarily used by
the USEPA and manufacturers for regulatory purposes to ensure emission
compliance. Some analytical results are confidential.
Data Center: U.S. Environmental Protection Agency (USEPA)
Dissemination Media: Hard copy (computer printouts), tape,
diskettes, online, bulletin board
Access Instructions: Contact the data center.
Availability Status: On Request
Individual data entries and summary statistics.
Data Set Citation
Dataset Title: Emissions Certification Database
Dataset Publisher: U.S. Environmental Protection AgencyOnline Resource: http://www.epa.gov/otaq/cert.htm
Start Date: 1975-01-01
Role: TECHNICAL CONTACT
U.S. Environmental Protection Agency (USEPA) Office of Mobile Sources 2565 Plymouth Road
City: Ann Arbor
Province or State: MI
Postal Code: 48105
U.S. Environmental Protection Agency (USEPA). May 1992.
Inventory of Exposure-related Data Systems Sponsored by Federal
Agencies. Washington, DC : USEPA.
Extended Metadata Properties
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Creation and Review Dates
Last DIF Revision Date: 2016-11-18