Emissions Certification Database

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
File Format:
Access Instructions: Contact the data center.
Size:
Memory Requirements:
Operating System:
Hardware Required:
Software Required:
Availability Status: On Request
Documentation Available:
CONTENTS:

Individual data entries and summary statistics.