Groundwater in National Parks

What's Going on Down There?

While there are many rivers, lakes, and oceans scattered across the National Park Service, what about all the water you can’t see?

Groundwater is more than just water that is stored underground in between the spaces and cracks in soil and rock, its a dynamic and vital force. While you can’t see the aquifers underground, you can see where the groundwater meets the surface in the form of seeps and springs. Many parks, especially in the arid west, rely on groundwater for park and ecosystem functions.

An aerial view of two rainbow colored hot springs giving off steam.
Excelsior Geyser and Grand Prismatic Spring in Yellowstone National Park are an example of where groundwater meets the surface in the form of springs.

NPS Photo/Jim Peaco

Groundwater is the foundation on which all surface water rests. It provides essential habitat for certain ecosystems, called Groundwater Dependent Ecosystems (GDE’s). Special characteristics like flow, temperature, or the chemical makeup of groundwater are vital for some species to survive, like the Devils Hole pupfish found in Death Valley National Park.

Groundwater not only supports biodiversity, but humans also rely on groundwater for drinking water, food and energy production. Some parks rely exclusively on groundwater for park functions. For example, groundwater supplies 100% of the drinking water at Death Valley and Grand Canyon National Parks!

For human use at national parks, groundwater is typically pumped up to the land surface through a well where it then can be used as potable water in campgrounds and visitor centers.

Sustaining Groundwater

Because groundwater is in such high demand, especially in Western parks, it is important to use it sustainably. Increasing demand for groundwater could cause river levels to decline, loss of habitat for plants and animals or could reduce the amount of water available to visitors.

Aquifers that supply water to parks are often recharged over hundreds to thousands of years. Understanding how, when, and where this recharge occurs is important to ensuring that groundwater withdrawal is conducted in a sustainable manner to maintain the resource over time.

The Water Resources Division works with parks and state water managers to protect groundwater-related resources. You can help use water sustainably too, learn how here.

Learn more about Groundwater

From the field

Showing results 1-10 of 64

    • Type: Article
    • Locations: Dinosaur National Monument
    • Offices: Inventory and Monitoring Division, Northern Colorado Plateau Inventory & Monitoring Network
    A researcher is taking notes walking along a transect line in a vegetation stand.

    The Inventory and Monitoring Division funded a project to study wetland habitats in Dinosaur National Monument, exploring their locations, conditions, and ecological roles. Data from this project will inform park management decisions and future updates to water rights.

    • Type: Article
    • Locations: Organ Pipe Cactus National Monument
    • Offices: Sonoran Desert Inventory & Monitoring Network
    An organ pipe cactus surrounded by small orange yellow poppies near a mountain.

    Sonoran Desert Network scientists monitor key resources and weather at Organ Pipe Cactus National Monument by taking measurements throughout the year, which helps us notice changes over time. This report summarizes weather, groundwater, and springs data from Water Year 2022. The data indicate the park's springs contained near-average levels of water, but high levels of several water chemistry parameters. WY2022 was warm and dry overall, with fewer cold days than average.

    • Type: Article
    • Locations: White Sands National Park
    • Offices: Chihuahuan Desert Inventory & Monitoring Network
    Bushes on grasses grow in the areas between white dunes. Blue mountains loom on the horizon.

    Climate and hydrology shape ecosystems and their functions, particularly in arid and semi-arid environments. Chihuahuan Desert Network scientists monitor climate, groundwater, and springs in White Sands National Park to see how they may be changing over time. This information helps park managers protect key resources. This report summarizes the results of springs monitoring in Water Year 2022.

    • Type: Article
    • Locations: Guadalupe Mountains National Park
    • Offices: Chihuahuan Desert Inventory & Monitoring Network
    Desert scrub and cacti frame the iconic El Capitan in the Guadalupe Mountains.

    Chihuahuan Desert Network scientists visit Guadalupe Mountains National Park every year to monitor climate, groundwater, and springs. By taking measurements of these key resources each year, we can better understand how they may be changing over time. This report summarizes the results from Water Year 2022.

    • Type: Article
    • Locations: Amistad National Recreation Area
    • Offices: Chihuahuan Desert Inventory & Monitoring Network
    The sky glows a gentle orange just after sunset over a rippling lake.

    Climate and hydrology shape ecosystems and how they function. This report summarizes Water Year 2022 climate, groundwater, reservoir level, and springs data. We monitor climate and water by taking measurements throughout the year, which helps us track changes over time.

    • Type: Article
    • Locations: Carlsbad Caverns National Park
    • Offices: Chihuahuan Desert Inventory & Monitoring Network
    Bats fly from the wide mouth of a cave. A path for visitors meanders into the cave.

    Chihuahuan Desert Network scientists monitor climate and water at Carlsbad Caverns National Park. Together, climate and hydrology shape ecosystems and the services they provide. Long-term monitoring provides early warning of potential problems, allowing managers to mitigate them before they become worse. This report summarizes climate, weather, and springs data from Water Year 2022.

    • Type: Article
    • Locations: Fort Bowie National Historic Site
    • Offices: Sonoran Desert Inventory & Monitoring Network
    Leaf-covered ocotillos and a large agave flower stalk on a hillside with a cloud-filled sky.

    Understanding changes in climate, groundwater, and surface water is key to assessing the condition of natural and cultural resources on national parks. At Fort Bowie National Historic Site we conduct long-term monitoring of climate, groundwater, and springs to provide early warning of potential problems, allowing managers to mitigate them before they become worse. In water year 2022, precipitation was boosted by an above average monsoon season.

    • Type: Article
    • Locations: Big Bend National Park
    • Offices: Chihuahuan Desert Inventory & Monitoring Network
    A shallow river flowing through sandy desert flats and hills in front of magestic mountains.

    Climate and water shape ecosystems in arid and semi-arid ecosystems. At Big Bend National Park, Chihuahuan Desert Network scientists monitor climate, groundwater, and 18 springs to help managers protect park resources. Understanding how climate and water may be changing over time can also help explain changes in other resources on the park. This report summarizes the results of our monitoring in Water Year 2022 (October 2021 through September 2022).

    • Type: Article
    • Locations: Bryce Canyon National Park, Cedar Breaks National Monument, Zion National Park
    Water flows out of a pipe in front of snow-capped mountains.

    Two IRA-funded projects are evaluating the impacts of climate change and other stressors on NPS water supplies and groundwater-dependent ecosystems. One project focuses on the implications for people, and another focuses on the implications for ecosystems.

    • Type: Article
    • Locations: Tonto National Monument
    • Offices: Sonoran Desert Inventory & Monitoring Network
    Aerial shot of the lower cliff dwelling, surrounded by saguaro cactus and green desert foliage.

    Sonoran Desert Network scientists monitor key resources and weather at Tonto National Monument by taking measurements throughout the year, which helps us track changes over time. This report summarizes weather and springs data from Water Year 2022. The data describe a dramatic change to Cave Canyon Spring. WY2022 was the third consecutive year of drought, and the park received less than average precipitation in all but three months.

Last updated: December 10, 2018