Skip to main content
U.S. flag

An official website of the United States government

This site is currently in beta, and your feedback is helping shape its ongoing development.

Return to search results

Terrestrial Condition Assessment (TCA) Ozone Chronic Exposure (Map Service)

Published by U.S. Forest Service | Department of Agriculture | Metadata Last Checked: January 27, 2026 | Last Modified: 2022-08-29
The average of W126 which is a weighted measure of chronic (lower level) ozone exposure within a landscape analysis unit. Updated through 2018. Data used are sourced from the EPA's Air Quality System Data Mart: https://aqs.epa.gov/aqsweb/airdata/download_files.html

Find Related Datasets

Click any tag below to search for similar datasets

data.gov

An official website of the GSA's Technology Transformation Services

Looking for U.S. government information and services?
Visit USA.gov