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Administered by the U.S. Geological Survey Gap Analysis Project, the Protected Areas Database of the United States (PAD-US) is the nation’s official inventory of public open space and private protected areas. The lands included in PAD-US are assigned conservation status codes that both denote the level of biodiversity preservation and indicate other natural, recreational and cultural uses.

Landsat 9 launched September 27, 2021, to acquire images of Earth, extending Landsat's record of our planet to over half a century. Learn more about the mission.

USGS Pennsylvania Water Science Center, in cooperation with the Pennsylvania Department of Environmental Protection, samples 28 wells biannually to monitor ambient groundwater quality conditions in a variety of settings throughout Pennsylvania. The most recent results for selected constituents can be accessed through the Groundwater Quality Monitoring Network Data Exploration Tool.

Expanding Pacific Research and Exploration of Submerged Systems (EXPRESS) is an inter-agency federal and nonfederal collaborative research effort aimed at gathering new data of the deep ocean, continental shelf and slope offshore of California, Oregon and Washington. This expansive partnership includes three federal agencies and additional principle investigators from leading research institutes.

This interactive map displays the location of water-quality data-collection sites, the drainage area for the Merrimack River, and selected streams in the Merrimack River Basin.

Explore an overview of the Landsat Science Products.