We all need water. It is vital for all life on, in, and above the Earth.

Why should you care? Well, YOU are mostly water. In fact, up to 60% of the human adult body is water.

More fun facts below:

  • Brain and heart = 73% water
  • Lungs = 83% water
  • Skin = 64% water
  • Muscles and kidneys = 79%
  • Bones = 31%

Everyday humans have to drink a certain amount of water to survive.

Where do we get most of our drinking water?

From groundwater.

“99% of all available freshwater comes from aquifers underground.” (Thanks NGWA)

In America, approximately 132 million of us rely on groundwater for drinking water.

Besides needing it to survive, water is used for irrigation, livestock, manufacturing, mining, thermoelectric power, and more, making it one of the most widely used and valuable natural resources we have.

More fun facts below:

  • Americans use 79.6 billion gallons of groundwater each day.
  • Groundwater is 20 to 30 times larger than all U.S. lakes, streams, and rivers combined.
  • 44 percent of the U.S. population depends on groundwater for its drinking water supply.
  • More than 13.2 million households have their own well, representing 34 million people.


Protect Your Groundwater Day (PYGWD) is on September 3. PYGWD is was created to highlight the development, management, and use of groundwater.

Hosted by the National Groundwater Association, they share that Americans are the largest water users, per capita, in the world.

In terms of groundwater, Americans use 79.6 billion gallons per day — the equivalent of 2,923 12-oz. cans for every man, woman, and child in the US.

Maintaining quality groundwater, keeping track of how much we have, and how much we use, is pretty important.

So hats off to all those monitoring groundwater, not only on Protect Your Groundwater Day, but every day!


We are proud to support the hydrologists, researchers and others, who monitor our groundwater with HOBO data loggers for water quality and water level.

Click the links below to read about how some of our customers are monitoring groundwater:

Are you monitoring groundwater using a HOBO data logger? Email us at social@onsetcomp.com. We’d love to share your story!

FYI – thanks to the USGS website for the info about ‘Water in You: Water and the Human Body’