Water Butler makes it easy to find the water levels at your nearby river or lake by checking with USGS. When you first open water butler, it will find nearby locations and ask you which one you want to make your default. Then, from there on out, you can say open water butler, and it will give you the water levels at that location. If you want to check other locations, just say ask water butler to check nearby locations. Finally, if you ever want to update the default location, just say ask water butler to update my default location. Data is from the United States Geological Survey (USGS) Water Services.