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Federal
U.S. Level III and IV Ecoregions (U.S. EPA) recent views
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
Average Temperatures in the Southwestern United States, 2000–2020 Versus Long-Term Average recent views
U.S. Environmental Protection Agency —
This indicator shows how the average air temperature from 2000 to 2020 has differed from the long-term average (1895 - 2020). To provide more detailed information,... -
Federal
Average Rate of Heat-Related Hospitalizations in 23 States, 2001-2010 recent views
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
Length of Growing Season, 1895–2023 recent views
U.S. Environmental Protection Agency —
This indicator looks at the impact of temperature on the length of the growing season in the contiguous 48 states, as well as trends in the timing of spring and fall... -
Federal
Heating and Cooling Degree Day by State, 1960–2023 Versus 1895–1959 recent views
U.S. Environmental Protection Agency —
This indicator shows how heating and cooling degree days have changed by state, based on a comparison of the first 65 years of available data (1895–1959) with the... -
Federal
Change in Permafrost Temperatures in Alaska, 1978-2022 recent views
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 Reported Lyme Disease Incidence in the Northeast and Upper Midwest, 1991–2018 recent views
U.S. Environmental Protection Agency —
This indicator shows how reported Lyme disease incidence has changed by state since 1991, based on the number of new cases per 100,000 people. The total change has... -
Federal
Change in the Magnitude of River Flooding in the United States, 1965-2015 recent views
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
Change in Glacier Surface Area in Glacier National Park, 1966–2015 recent views
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
Change in Summer Surface Water Temperatures of North American Lakes, 1985-2009 recent views
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
Average Change in Drought (Five-Year SPEI) in the Contiguous 48 States, 1900–2020 recent views
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
Mineral Resource Data System (MRDS) Points, U.S. EPA Region 9, 2016, USGS recent views
U.S. Environmental Protection Agency —
Mineral resource occurrence data covering the world, most thoroughly within the U.S. This database contains the records previously provided in the Mineral Resource... -
Federal
Streamflow in the United States, 1940–2022 recent views
U.S. Environmental Protection Agency —
This map shows percentage changes in the minimum annual rate of water carried by rivers and streams across the country, based on the long-term rate of change from... -
Federal
Change in Growing Degree Days in the Contiguous 48 States, 1948–2020 recent views
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 Ice Thaw Dates for Selected U.S. Lakes, 1905-2019 recent views
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
Change in Ragweed Pollen Season, 1995-2015 recent views
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 First Leaf and Bloom Dates Between 1951–1960 and 2014–2023 recent views
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 recent views
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
Change in Unusually Hot and Cold Temperatures in the Contiguous 48 States, 1948–2023 recent views
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...