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County Subdivisions, Population, and Household Wood Fuel Usage - US EPA Regions 1, 2, 3, 9 (2022) and 10 (2024)

Published by U.S. Environmental Protection Agency, Region 1 | U.S. Environmental Protection Agency | Catalog Last Checked: August 03, 2026 at 05:03 AM | Dataset Last Updated: May 20, 2026 at 12:00 AM
This hosted feature layer, displayed in the Valley Identification Tool, contains the following layers: US Census County Subdivisions in US EPA Regions 1, 2, 3, 9 and 10. EPA overlaid topographic Valleys (from USGS 30m NED) with US Census County Subdivisions, population (EPA Dasymetric, 2010) and household wood fuel usage (American Community Survey snapshot) to find where people may be vulnerable to wood smoke pollution during winter thermal inversions.

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