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2010 Enhanced I/M Program Annual Report

Executive Summary

Complete downloadable report PDF (619 kb, 94 pgs)

The New York State Departments of Environmental Conservation (DEC) and Motor Vehicles (DMV) jointly administer New York State's motor vehicle Inspection and Maintenance (I/M) programs. This report reflects the Departments' coordinated efforts to fulfill federal I/M reporting requirements under 40 CFR Section 51.366 for Calendar Year 2010.

New York State commenced mandatory motor vehicle emissions inspection within the downstate New York Metropolitan Area (NYMA) in 1981. The 9-county NYMA includes New York City (Bronx, Kings, Manhattan, Richmond, and Queens Counties), Long Island (Nassau and Suffolk Counties), Rockland County, and Westchester County. In 1998 in response to revisions to the federal I/M regulations, New York replaced the existing "idle test" program in NYMA with the New York Transient Emission Short Test ("NYTEST") program. NYTEST required tailpipe emissions testing from 1998-2010.

New York State has required mandatory onboard diagnostic (OBDII) inspections through its New York Vehicle Inspection Program ("NYVIP") beginning in 2004. OBDII inspections are required for most model year 1996 and newer light duty vehicles (LDVs) and light duty trucks (LDTs). Since May 2005, NYVIP inspections have been required statewide (62 counties) at 10,000+ licensed inspection stations. With the statewide adoption of OBDII inspections coupled with a declining vehicle population subject to tailpipe emissions testing, the need for NYTEST inspections declined over time. As outlined with its June 2009 Enhanced I/M State Implementation Plan revision, New York ended the NYTEST program on December 31, 2010. From 2005-2010, the NYTEST and NYVIP programs operated contemporaneously at 3,200-4,000 licensed NYMA inspections stations.

During Calendar Year 2010, more than 4.6 million motor vehicles were registered within NYMA. 3,798,487 NYMA vehicles (or 82.42% of the total registered) were subject to emissions testing (NYVIP, NYTEST). The majority of the emissions-tested vehicles (3,340,689 or 87.95%) received OBDII inspections.

During Calendar Year 2010, more than 5.1 million motor vehicles were registered in the 53-County "Upstate" I/M area. 4,106,279 Upstate vehicles (or 79.95% of the total registered) were subject to NYVIP emissions testing. The majority of the emissions-tested vehicles (3,604,485 or 87.78%) received OBDII inspections.

Pursuant to a Consent Order filed on September 6, 1977, all yellow medallion taxi cabs under the jurisdiction of the New York City Taxi and Limousine Commission (T&LC) must receive three emissions inspections per year. Beginning in December 2003, the T&LC commenced mandatory OBDII inspections at their centralized test-only Woodside (Queens) facility for their applicable taxi fleet. During Calendar Year 2010, 36,924 vehicles (29,192 LDVs and 7,732 LDTs) received a total of 60,561 OBDII inspections.


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  • NYSDEC
    Division of Air Resources
    Vehicle I/M Program
    625 Broadway
    Albany, NY 12233-3259
    518-402-8402
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