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Emissions from Transportation

Emissions from transportation, primarily cars, buses, and trucks, contribute a significant amount of pollution to our air on a daily basis. Every year motor vehicles contribute approximately 11% of the local PM2.5 and 28% of the nitrogen oxide emissions. The City has been actively finding ways to reduce emissions from motor vehicles including passing and enforcing rules to use cleaner fuels across the city and to reduce unnecessary emissions like idling.





Turn it Off and Clear the Air
The law limits vehicle idling to one minute adjacent to any school, pre-K to 12th grade, public or private, in the City of New York. May is Asthma Awareness Month, so now is the time to make an extra effort to remind parents and providers to turn off their engines if they are transporting students to and from school. Here are some ready to use flyers which can be posted in school facilities and distributed to parents and teachers.
English Flyer
Spanish Flyer
Chinese Flyer
Defining the Term “Adjacent”




City-Operated Motor Vehicles
On May 11, 2005, Mayor Michael Bloomberg signed Local Law 39 for the year 2005 requiring that diesel fuel-powered motor vehicles owned or operated by city agencies be powered by ultra-low sulfur diesel fuel (ULSDF). The law further requires that a percentage, increasing yearly to 100 percent, of diesel fuel-powered motor vehicles with a weight of more than 8,500 pounds that are owned or operated by city agencies usethe best available retrofit technology (BART) or be equipped with an engine certified to the 2007 EPA standard for reducing the emission of pollutants. DEP went through the Citywide Administrative Procedure Act (CAPA) process and promulgated a list of what constitutes BART in a hierarchical schematic. Diesel Particulate Filters and Diesel Oxidation Catalysts were found to be the best devices based on the EPA and California Air Resources Board for verified technology.
Final Rule
Amendment to Rule


Sight-Seeing Buses

Sight-Seeing Buses
On May 11, 2005, Mayor Michael Bloomberg signed Local Law 41 for the year 2005 requiring that any sight-seeing bus that is licensed by the Department of Consumer Affairs (DCA) and is equipped with an engine that is over three years old shall use the best available retrofit technology (BART) for reducing the emission of pollutants. A sight-seeing bus, as defined by the law, is a vehicle that carries eight or more passengers and operates for hire from a fixed point in the City to a place of interest or amusement. DEP went through the CAPA process and selected diesel particulate filters and diesel oxidation catalysts as the BART.
Final Rule
Amendments to Rule
Sight-Seeing Compliance Form


School Buses

School Buses
On May 11, 2005, Mayor Michael Bloomberg signed Local Law 42 for the year 2005 requiring that by September 1, 2006 all diesel fuel-powered school buses shall be powered by ultra-low sulfur diesel fuel (ULSDF). DEP went through the Citywide Administrative Procedure Act (CAPA) process and promulgated a list of what constitutes the best available retrofit technology (BART)in a hierarchical schematic.
Final Rule


Sanitation Vehicles

Sanitation Vehicles
On May 9, 2005, Mayor Michael Bloomberg signed Local Law 40 for the year 2005 requiring that any solid waste contract or recyclable materials contract specify that diesel fuel-powered vehicles and diesel fuel-powered non-road vehicles used in the performance of such contracts be powered by ultra-low sulfur diesel fuel (ULSDF). The law further requires that any solid waste or recyclable materials contract specify that all diesel fuel-powered vehicles and diesel fuel-powered non-road vehicles used in the performance of such contracts use the best available retrofit technology (BART) for reducing the emission of pollutants.
Final Rule
Amendments to Rule
Sanitation Vehicles Compliance Form


Non-road Vehicles

Non-road Vehicles (Construction Equipment, Generators, etc.)
On December 22, 2003, Mayor Michael Bloomberg signed Local Law 77 for the year 2003 requiring any diesel-powered non-road vehicle, fifty horsepower and greater, that is owned by, operated by or on behalf of, or leased by a City agency be powered by ultra-low sulfur diesel fuel (ULSDF) and utilize the best available technology (BAT) for reducing the emission of pollutants. DEPhas gone through the CAPA process and has chosen Diesel Particulate Filters and Diesel Oxidation Catalysts as the BAT. DEP continues to review the technology every 6 months.
Local Law 77 Signed by Mayor Bloomberg
Final Rule 2008 (PDF)
2011 amendment to LL 77 Rule
Local Law 77 Monthly Reporting Form
Emission Compliance Form

Back to Air Pollution

Reservoir Levels

Current: 75.9%

Normal: 71.7%