-
Federal
Change in Ragweed Pollen Season, 1995-2015
U.S. Environmental Protection Agency —
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... -
Federal
Change in Glacier Surface Area in Glacier National Park, 1966–2015
U.S. Environmental Protection Agency —
This map shows the change in surface area of all 37 named glaciers in Glacier National Park for 1966, 1998, 2005, and 2015. The glacier footprints for four different... -
Federal
U.S. Level III and IV Ecoregions (U.S. EPA)
U.S. Environmental Protection Agency —
This map service displays Level III and Level IV Ecoregions of the United States and was created from ecoregion data obtained from the U.S. Environmental Protection... -
Federal
Change in Summer Surface Water Temperatures of North American Lakes, 1985-2009
U.S. Environmental Protection Agency —
This map shows the total change in the average July–September surface water temperatures in 34 North American lakes from 1985 to 2009, as measured by satellites. Red... -
Federal
Change in Ice Thaw Dates for Selected U.S. Lakes, 1905-2019
U.S. Environmental Protection Agency —
This figure shows the change in the "ice-off" date, or date of ice thawing and breakup, for 14 U.S. lakes during the period from 1905 to 2019. All of the lakes have... -
Federal
Average Change in Drought (Five-Year SPEI) in the Contiguous 48 States, 1900–2020
U.S. Environmental Protection Agency —
This map shows how drought conditions have changed across the contiguous 48 states from 1900 to 2020. The data are showed for small regions called climate divisions,... -
Federal
Change in Growing Degree Days in the Contiguous 48 States, 1948–2020
U.S. Environmental Protection Agency —
This map shows trends in the total number of growing degree days per year at 305 weather stations . The color and size of the symbols represent percent change between... -
Federal
Change in the Magnitude of River Flooding in the United States, 1965-2015
U.S. Environmental Protection Agency —
This figure shows changes in the size and frequency of flooding events in rivers and streams in the United States between 1965 and 2015. Blue upward-pointing symbols... -
Federal
Average Rate of Heat-Related Hospitalizations in 23 States, 2001-2010
U.S. Environmental Protection Agency —
This map shows the 2001–2010 average rate of hospitalizations classified as “heat-related” by medical professionals in 23 states that participate in CDC’s... -
Federal
Changes in Stream Water Temperatures in the Chesapeake Bay Region, 1960-2014
U.S. Environmental Protection Agency —
This map shows the changes in stream water temperatures in the Chesapeake Bay region from 1960 to 2014. Blue circles represent cooling trends in stream water... -
Federal
EPA Office of Water (OW): Beaches NHDPlus Indexed Dataset
U.S. Environmental Protection Agency —
The Beaches Environmental Assessment and Coastal Health (BEACH) Program focuses on the following five areas to meet the goals of improving public health and...