What are US water resources?
The United States has multiple sources of water.
The United States has multiple sources of water that vary depending on geographic location. Some of our water comes from ground water, much of the freshwater the US uses is surface water (streams, lakes, etc), springs are another source, as is rainfall. The Great Lakes hold 1/5th of the planet's freshwater, so they are a valued and important water resource.
The image below shows water source and use in the US in 2005:
The map below shows aquifers (body of rock that contains groundwater) in the US:
You can see an interactive map of water sources from the United States Geological Society here.