Skip to main content
U.S. flag

An official website of the United States government

Groundwater

Groundwater is one of our most valuable resources—even though you probably never see it or even realize it is there. There is water somewhere beneath your feet no matter where on Earth you live. Groundwater starts as precipitation, just as surface water does, and once water penetrates the ground, it continues moving, sometimes quickly and sometimes very slowly. Eventually groundwater emerges

Filter Total Items: 11

The Water Science School -- What We Offer

The U.S. Geological Survey's Water Science SchoolWhere anyone of any age can learn all about water.
link

The Water Science School -- What We Offer

The U.S. Geological Survey's Water Science SchoolWhere anyone of any age can learn all about water.
Learn More

Water Science Photo Galleries

Learn about water using pictures
link

Water Science Photo Galleries

Learn about water using pictures
Learn More

Groundwater True/False Quiz

How much do you know about the water below your feet? Take our Groundwater True/False Quiz and find out.
link

Groundwater True/False Quiz

How much do you know about the water below your feet? Take our Groundwater True/False Quiz and find out.
Learn More

Groundwater Photo Gallery

Learn about groundwater using pictures.
link

Groundwater Photo Gallery

Learn about groundwater using pictures.
Learn More

Water Properties True/False Quiz

How much do you know about water properties? Take our Water Properties True/False Quiz and find out.
link

Water Properties True/False Quiz

How much do you know about water properties? Take our Water Properties True/False Quiz and find out.
Learn More

Groundwater Use in the United States

Groundwater is one of our most valuable resource—even though you probably never see it or even realize it is there. Groundwater is essential for irrigation and human use in many parts of the country. The use of groundwater in the United States in 2015 is described below.
link

Groundwater Use in the United States

Groundwater is one of our most valuable resource—even though you probably never see it or even realize it is there. Groundwater is essential for irrigation and human use in many parts of the country. The use of groundwater in the United States in 2015 is described below.
Learn More

How Do Hydrologists Locate Groundwater?

As a non-existent proverb states: "Humans don't live by surface water alone." For thousands of years, people have also relied on groundwater to serve their every need. Groundwater is invaluable for many uses, from irrigation to drinking-water supply. But, you can't see groundwater, so how do water scientists know where it is in order to be able to drill wells and pump it out for use?
link

How Do Hydrologists Locate Groundwater?

As a non-existent proverb states: "Humans don't live by surface water alone." For thousands of years, people have also relied on groundwater to serve their every need. Groundwater is invaluable for many uses, from irrigation to drinking-water supply. But, you can't see groundwater, so how do water scientists know where it is in order to be able to drill wells and pump it out for use?
Learn More

Contamination of Groundwater

Groundwater will normally look clear and clean because the ground naturally filters out particulate matter. But did you know that natural and human-induced chemicals can be found in groundwater even if appears to be clean? Below is a list of some contaminants that can occur in groundwater.
link

Contamination of Groundwater

Groundwater will normally look clear and clean because the ground naturally filters out particulate matter. But did you know that natural and human-induced chemicals can be found in groundwater even if appears to be clean? Below is a list of some contaminants that can occur in groundwater.
Learn More

Artesian Water and Artesian Wells

Artesian water is really not different from other groundwater, except for the fact that it flows to the land surface because pressure in the rocks underground force it to the surface. But, having water flow to the surface naturally is a handy way to tap groundwater resources.
link

Artesian Water and Artesian Wells

Artesian water is really not different from other groundwater, except for the fact that it flows to the land surface because pressure in the rocks underground force it to the surface. But, having water flow to the surface naturally is a handy way to tap groundwater resources.
Learn More

Contamination in U.S. Private Wells

Groundwater is crutial to millions of Americans as well as many more worldwide. Groundwater provides drinking water to many. Thus, having reliably clean groundwater is of concern for many throughout the world. But, groundwater can become contaminated with chemicals, biologic organisms, and other possibly-harmful agents.
link

Contamination in U.S. Private Wells

Groundwater is crutial to millions of Americans as well as many more worldwide. Groundwater provides drinking water to many. Thus, having reliably clean groundwater is of concern for many throughout the world. But, groundwater can become contaminated with chemicals, biologic organisms, and other possibly-harmful agents.
Learn More

Water Dowsing

"Water dowsing" refers in general to the practice of using a forked stick, rod, pendulum, or similar device to locate underground water, minerals, or other hidden or lost substances, and has been a subject of discussion and controversy for hundreds, if not thousands, of years.
link

Water Dowsing

"Water dowsing" refers in general to the practice of using a forked stick, rod, pendulum, or similar device to locate underground water, minerals, or other hidden or lost substances, and has been a subject of discussion and controversy for hundreds, if not thousands, of years.
Learn More