NATA air pollutants download file

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National Air Toxics Assessment (NATA). NATA provides information on potential health risks from breathing air toxics, also known as hazardous air pollutants. NATA is a screening tool, used to help EPA and state, local and tribal air agencies find out if areas, pollutants or types of pollution sources need to be looked at further to better. NATA carcinogenic impacts calculation. NATA estimates the ambient air toxic concentrations using a hybrid model, which combines regional air-quality modeling (CMAQ) and dispersion modeling (AERMOD) with emission data from the NEI and meteorology data files as inputs (Scheffe et al. ).CMAQ is a 3-D grid-based Eulerian air quality model that simulates the emission, production, decay, and. NATA is a prioritization tool used to identify geographic areas, pollutants and emission sources that should be evaluated further to gain a better understanding of health risks posed by air toxics. This update of the National Air Toxics Assessment tool is based on emissions for the Calendar Year.

42 hazardous air pollutants plus diesel particulate matter using modeled estimates from the National-Scale 43 Air Toxics Assessment (NATA). NATA publishes estimates at the spatial resolution of U.S. Census 44 tracts, which are subdivisions of a county. These local scale, model-predicted estimates from NATA are. This page contains pre-generated files of data available for download. The files are updated twice per year: once in June to capture the complete data for the prior year and once in December to capture the data for the summer (ozone season). Site and Monitor Descriptions Table of Annual Summary Data Tables of Daily and Daily Summary Data. While the files, NATA US Neurological Risk County and NATA US Respiratory Risk County, present the noncancer results specifically for those endpoints, the County-level Pollutants files provide the noncancer information for other endpoints (e.g., reproductive system), when a dose-response value was available for that air toxic.