Skip to main content
U.S. flag

An official website of the United States government

Change in Ragweed Pollen Season, 1995-2015

Published by U.S. EPA Office of Air and Radiation (OAR) - Office of Atmospheric Programs (OAP) | U.S. Environmental Protection Agency | Catalog Last Checked: May 26, 2026 at 04:12 PM | Dataset Last Updated: August 02, 2016 at 12:00 AM
This figure shows how the length of ragweed pollen season changed at 11 locations in the central United States and Canada between 1995 and 2015. Data were provided by Dr. Lewis Ziska of the U.S. Department of Agriculture, Agricultural Research Service. Red circles represent a longer pollen season; the blue circle represents a shorter season. Larger circles indicate larger changes. For more information: www.epa.gov/climatechange/science/indicators

Resources

2 resources available

Find Related Datasets

Search by Tags

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