First you will rarely see pure water as it is not found 

The U.S. Geological Survey (USGS) has been measuring water for decades. Millions of measurements 

No, you don't often hear your local news broadcaster say "Folks, today's pH value of Dryville Creek is 6.3!" But pH

Sediment-data collection in the Little Colorado River

Storms, of course, deliver large amounts of water to a river

The amount of dissolved calcium and magnesium

The U.S. Geological Survey (USGS) has been measuring how much water

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