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Data Directory : List of Databases
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DatabasesData Tables 
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Database NameDescription
National Air Quality Data - AIRS DatabaseContains information on air quality in cities and towns throughout the United States. Pollutants measured include ozone, particulate matter, carbon monoxide, nitrogen dioxide, sulfur dioxide, and lead.Profile
 
National Census of Ferry OperatorsThe National Census of Ferry Operators database is a collection of summary tables that provide ferry operation data from a nationwide census of ferry operators along with other sources of ferry data such as the U.S. Coast Guard and the U.S. Army Corps of Engineers.Profile
 
National Compensation Survey (NCS)Provides detailed data on local, regional, and national occupational earnings.Profile
 
National Emission Trends (NET)Emissions of criteria air pollutants from point, area, and mobile sources--includes carbon monoxide (CO), nitrogen oxides (NOx), volatile organic compounds (VOC), sulfur dioxide (SO2), and particulate matter (PM-10).Profile
 
National Employment, Hours, and EarningsData include hourly and weekly wage figures for transportation industries and transportation-related industries.Profile
 
National Toxics Inventory (NTI)Complete national inventory of stationary and mobile sources that emit hazardous air pollutants--includes emission estimates.Profile
 
National Transit Database (NTD)Annual data on performance, operations, safety, finances, and accessibility of over 500 transit operators in over 400 urbanized areas in United States.Profile
 
Nationwide Personal Transportation Survey (NPTS)The NPTS is a household travel survey conducted every five years that provides data on the amount and nature of personal travel in the U.S.Profile
 
North American Transborder Freight DataNorth American merchandise trade data by commodity type, by surface mode of transportation (rail, truck, pipeline, mail and other), and with geographic detail for U.S. exports to and imports from Canada and MexicoProfile
 
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