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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 Snowfall
U.S. Environmental Protection Agency —
This indicator shows the average rate of change in total snowfall from 1930 to 2007 at 419 weather stations in the contiguous 48 states. Blue circles represent... -
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
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
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 Permafrost Temperatures in Alaska, 1978-2023
U.S. Environmental Protection Agency —
This map shows the change in permafrost temperature per decade for long-term borehole sites in Alaska. As the circles get larger, the rate of warming per decade... -
Federal
Change in Unusually Hot and Cold Temperatures in the Contiguous 48 States, 1948–2023
U.S. Environmental Protection Agency —
This map shows trends in unusually hot and cold temperatures at individual weather stations that have operated consistently since 1948. In this case, the term... -
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... -
Federal
Change in First Leaf and Bloom Dates Between 1951–1960 and 2014–2023
U.S. Environmental Protection Agency —
This indicator shows modeled trends in lilac and honeysuckle first leaf dates at weather stations across the contiguous 48 states. This map compares the average first... -
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...