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    Question ID:   11568         Current Version: 1
Question: What are common water measurements?
Category: Science > Environment & Ecology
Keywords: common, properties, water, measurement
Type: what
Rating:(0 ratings)    Views: 162    Discussions: 0   In Watch Lists: 1  

 
    Answer:
The U.S. Geological Survey has been measuring water for decades. Millions of measurements and analyses have been made. Some measurements are taken almost every time water is sampled and investigated, no matter where in the U.S. the water is being studied. Even these simple measurements can sometimes reveal something important about the water and the environment around it.

The results of a single measurement of a water's properties are actually less important than looking at how the properties vary over time. For example, if you take the pH of the creek behind your school and find that it is 5.5, you might say "Wow, this water is acidic!" But, a pH of 5.5 might be "normal" for that creek. It is similar to how my normal body temperature (when I'm not sick) is about 97.5 degrees, but my third-grader's normal temperature is "really normal" -- right on the 98.6 mark. As with our temperatures, if the pH of your creek begins to change, then you might suspect that something is going on somewhere that is affecting the water, and possibly, the water quality. So, often, the changes in water measurements are more important than the actual measured values.

pH is only one measurement of a water body's health; there are others, too. Choose from this list to find out what they are and how they can reveal something about water.

Source: USGS
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