2983366F-1FF3-46E1-9FD1-EF7E3847B0A0 eng utf8 dataset dataset Alexandra Dichter U.S. Environmental Protection Agency, Region 1 GIS Coordinator (617) 918-1142 5 Post Office Square, Suite 100 Boston MA 02109 dichter.alexandra@epa.gov https://www.epa.gov/aboutepa/epa-region-1-new-england website information pointOfContact 2025-02-10 ISO 19139 Geographic Information - Metadata - Implementation Specification 2007 0 Valley Identification Tool - US EPA Regions 1, 2, 3, 9, 10 - 2024 Alexandra Dichter U.S. Environmental Protection Agency, Region 1 GIS Coordinator (617) 918-1142 5 Post Office Square, Suite 100 Boston MA 02109 dichter.alexandra@epa.gov https://www.epa.gov/aboutepa/epa-region-1-new-england website information pointOfContact tableDigital The Valley Identification Tool web mapping application includes Valleys (locations that are lower than surrounding areas, derived from USGS 30m DEM), population in valleys (reallocated within Census block groups), and households heated primarily with wood (American Community Survey, most recent at time of processing), which are summarized by Census County Subdivision. Other layers included in the Valley Identification Tool web map include 2017 National Emissions Inventory (NEI) facilities, Tribal areas, and air monitors data. Created by US EPA Region 1 GIS Center; and implemented in EPA Regions 2, 3 and 9 in 2022 and Region 10 in 2024 by regional GIS staff, US EPA Office of Mission Support (OMS). Valley Identification Tool web mapping application for US EPA Regions 1, 2, 3, 9 (2022) and 10 (2024). Created by US EPA Region 1 GIS Center; and implemented in EPA Regions 2, 3, 9 and 10 by regional GIS staff, US EPA Office of Mission Support (OMS). Alexandra Dichter U.S. Environmental Protection Agency, Region 1 GIS Coordinator (617) 918-1142 5 Post Office Square, Suite 100 Boston MA 02109 dichter.alexandra@epa.gov https://www.epa.gov/aboutepa/epa-region-1-new-england website information publisher asNeeded Arizona California Chesapeake Bay Connecticut Delaware Maine Maryland Massachusetts Nevada New Hampshire New Jersey New York Pennsylvania Rhode Island Vermont Virginia Washington DC West Virginia place EPA Place Names 2015-01-31 publication 020:072 theme Federal Program Inventory 2013-09-16 publication Air Environment Exposure Health theme EPA GIS Keyword Thesaurus 2007-11-02 publication Downloadable Data EPA Public Domain License licenseUnrestricted https://edg.epa.gov/EPA_Data_License.html grid eng utf8 Version 6.2 (Build 9200) ; Esri ArcGIS 10.8.1.14362 false -131.625395 -63.943716 24.527329 53.109107 File Geodatabase Raster Dataset https://epa.maps.arcgis.com/home/item.html?id=d1a9235c233c4fa98db9c62874e3b404 download information service EPA Region 1 GIS Center applied ArcGIS' Focal Statistics tool to the USGS 30-meter NED DEM to find places where elevations are significantly less than average. We then quantified population and wood fuel usage within Census County Subdivisions to find locations which may be vulnerable to wood smoke pollution during winter thermal inversions.