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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 | Metadata Last Checked: January 27, 2026 | Last Modified: 2024-11-01T00:00:00.000+00:00
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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