The National Emission Inventory contains measured, modeled, and estimated data for emissions of all known source categories in the US (stationary sources, fires, light duty vehicles and trucks, Heavy duty engines, Motorcycles, ATVs, non-road engines and equipment, locomotives, aircraft, and marine vessels). The statutory authority leading to the collection of this information comes from Title II, Part A of the Clean Air Act.Substance classes include CAPs, HAPs, and some GHG data.Data included in the National Emission Inventory is collected annually, Air Pollutant Trends Data is made available annually, and an National Emissions Inventory of air emissions of both Criteria and Hazardous air pollutants from all air emissions sources is prepared every three years.

This web service contains layers that depict annual emissions for 2014 at the facility and county level for the following criterial pollutants: CO, Lead, NH3, NOx, PM10, PM25, SO2, and VOC. The National Emissions Inventory (NEI) is a comprehensive and detailed estimate of air emissions of criteria pollutants, criteria precursors, and hazardous air pollutants from air emissions sources. The NEI is released every three years based primarily upon data provided by State, Local, and Tribal air agencies for sources in their jurisdictions and supplemented by data developed by the US EPA. The NEI is built using the Emissions Inventory System (EIS) first to collect the data from State, Local, and Tribal air agencies and then to blend that data with other data sources. NEI point sources include emissions estimates for larger sources that are located at a fixed, stationary location. Point sources in the NEI include large industrial facilities and electric power plants, airports, and smaller industrial, non-industrial and commercial facilities. A small number of portable sources such as some asphalt or rock crushing operations are also included. Some states voluntarily also provide facilities such as dry cleaners, gas stations, and livestock facilities, which are otherwise included in the NEI as nonpoint sources. The emissions potential of each facility determines whether that facility should be reported as a point source, according to emissions thresholds set in the Air Emissions Reporting Rule (AERR). NEI Point Sources are all included in the EIS Point Data Category. NEI nonpoint sources include emissions estimates for sources which individually are too small in magnitude to report as point sources. These emissions sources are included in the NEI as a county total or tribal total (for participating tribes). Examples include residential heating, commercial combustion, asphalt paving, and commercial and consumer solvent use. NEI nonpoint sources are all included in the EIS Nonpoint Data Category.

This US EPA Office of Air and Radiation, Office of Air Quality Planning and Standards, Air Quality Assessment Division, Air Quality Analysis Group (OAR, OAQPS, AQAD, AQAG) web service contains the following layers created from the 2008, 2011 and 2014 National Emissions Inventory (NEI): All Pollutants, which include hazardous air pollutants (HAPs) and criteria air pollutants (CAPs) Criteria Majors, which include CAP point source emissions ≥ 100 tons per year (except Lead which is ≥ 0.5 tons per year) Criteria Minors, which include CAP point source emissions < 100 tons per year (except Lead which is < 0.5 tons per year). Layers are drawn at all scales. The National Emission Inventory (NEI) is a comprehensive and detailed estimate of air emissions of criteria pollutants, criteria precursors, and hazardous air pollutants from air emissions sources. The NEI is released every three years based primarily upon data provided by State, Local, and Tribal air agencies for sources in their jurisdictions and supplemented by data developed by the US EPA. The NEI is built using the Emissions Inventory System (EIS) first to collect the data from State, Local, and Tribal air agencies and then to blend that data with other data sources. NEI point sources include emissions estimates for larger sources that are located at a fixed, stationary location. Point sources in the NEI include large industrial facilities and electric power plants, airports, and smaller industrial, non-industrial and commercial facilities. A small number of portable sources such as some asphalt or rock crushing operations are also included. Some states voluntarily also provide facilities such as dry cleaners, gas stations, and livestock facilities, which are otherwise included in the NEI as nonpoint sources. The emissions potential of each facility determines whether that facility should be reported as a point source, according to emissions thresholds set in the Air Emissions Reporting Rule (AERR). NEI Point Sources are all included in the EIS Point Data Category. NEI nonpoint sources include emissions estimates for sources which individually are too small in magnitude to report as point sources. These emissions sources are included in the NEI as a county total or tribal total (for participating tribes). Examples include residential heating, commercial combustion, asphalt paving, and commercial and consumer solvent use. NEI nonpoint sources are all included in the EIS Nonpoint Data Category.

This US EPA Office of Air and Radiation, Office of Air Quality Planning and Standards, Air Quality Assessment Division, Air Quality Analysis Group (OAR, OAQPS, AQAD, AQAG) web service contains the following layers created from the 2008, 2011 and 2014 National Emissions Inventory (NEI): All Pollutants, which include hazardous air pollutants (HAPs) and criteria air pollutants (CAPs) Criteria Majors, which include CAP point source emissions ≥ 100 tons per year (except Lead which is ≥ 0.5 tons per year) Criteria Minors, which include CAP point source emissions < 100 tons per year (except Lead which is < 0.5 tons per year). Layers are drawn at all scales. The National Emission Inventory (NEI) is a comprehensive and detailed estimate of air emissions of criteria pollutants, criteria precursors, and hazardous air pollutants from air emissions sources. The NEI is released every three years based primarily upon data provided by State, Local, and Tribal air agencies for sources in their jurisdictions and supplemented by data developed by the US EPA. The NEI is built using the Emissions Inventory System (EIS) first to collect the data from State, Local, and Tribal air agencies and then to blend that data with other data sources. NEI point sources include emissions estimates for larger sources that are located at a fixed, stationary location. Point sources in the NEI include large industrial facilities and electric power plants, airports, and smaller industrial, non-industrial and commercial facilities. A small number of portable sources such as some asphalt or rock crushing operations are also included. Some states voluntarily also provide facilities such as dry cleaners, gas stations, and livestock facilities, which are otherwise included in the NEI as nonpoint sources. The emissions potential of each facility determines whether that facility should be reported as a point source, according to emissions thresholds set in the Air Emissions Reporting Rule (AERR). NEI Point Sources are all included in the EIS Point Data Category. NEI nonpoint sources include emissions estimates for sources which individually are too small in magnitude to report as point sources. These emissions sources are included in the NEI as a county total or tribal total (for participating tribes). Examples include residential heating, commercial combustion, asphalt paving, and commercial and consumer solvent use. NEI nonpoint sources are all included in the EIS Nonpoint Data Category.

This data exchange allows states to submit data to the US Environmental Protection Agency's National Emissions Inventory (NEI). NEI is a national database of air emissions information including input from numerous State and local air agencies, tribes, and industry. (Status: In Transition to the Emission Inventory System)

This data exchange allows states to submit data to the US Environmental Protection Agency's National Emissions Inventory (NEI). NEI is a national database of air emissions information including input from numerous State and local air agencies, tribes, and industry. (Status: In Transition to the Emission Inventory System)

본 데이터는 「대기환경보전법 시행규칙」에 근거하여 제작자동차의 종류, 연료, 유종, 적용기준명 및 오염물질별 배출가스에 대한 법적 허용 한계를 규정한 자료입니다. 자동차의 차종 및 연료 유형에 따라 오염물질별 배출허용 기준값을 제공하여, 배출가스 관리 및 관련 제도 운영에 활용할 수 있습니다. 제공하는 데이터 항목으로는 일련번호, 차종 구분, 연료 구분, 배출허용기준 유종 명, 배출허용기준 적용 기준 명, 적용 기준 명, 배출허용기준 차종 명, 구분1 값, 구분2 값, 구분3 값, 배출시험 항목 명, 일산화탄소 기준 값, 탄화수소 기준 값, 비메탄계유기가스 기준 값, 비메탄계탄화수소 기준 값, 총탄화수소 기준 값, 질소산화물 기준 값, 메테인 기준 값, 암모니아 기준 값, 비메탄계유기가스 질소산화물 기준 값, 탄화수소 질소산화물 기준 값, 비메탄계탄화수소 질소산화물 기준 값, 입자상물질 기준 값, 입자개수 기준 값, 입자개수 N 값, 증발가스 기준 값, 총탄화수소 질소산화물 기준 값, 배출허용기준 구분 등을 제공합니다.

This dataset contains 2017 national-level criteria and hazardous air pollutant emissions by North American Industry Classification System (NAICS) 2012 6-digit codes. This dataset was generated with FLOWSAv0.3.1 by calling the getFlowBySector() function and passing "CAP_HAP_national_2017" as the method name. FLOWSA is a publicly available python package that generates standardized environmental flows by industry (https://github.com/USEPA/flowsa/releases/tag/v0.3.1). The metadata text file included as a supporting document records the FLOWSA tool version and input dataset bibliographic details. This dataset is associated with the following publication: Ingwersen, W.W., M. Li, B. Young, J. Vendries, and C. Birney. USEEIO v2.0, The US Environmentally-Extended InputOutput Model v2.0. Scientific Data. Springer Nature Group, New York, NY, 194, (2022).