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The first kit measurement is pH, which is a measure of how acidic or basic a fluid is. An example of an acidic fluid is vinegar, while an example of a basic (alkaline) fluid is bleach. Stream water can best support the largest amount of aquatic life when the pH is neutral. Neutral pH values generally range between 6.5 – 7.5. With a pH reading we can determine whether a stream is capable of supporting a significant amount of aquatic life.
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The second kit measurement is the iron concentration in parts per million. To better understand the impact of abandoned mine drainage we also need to understand what the concentration of iron in the water is. When underground coal mines fill with water, several chemical reactions take place to release large amounts of iron into solution. When iron is released into our streams and exposed to the environment, it has the potential to turn a stream orange/red. High concentrations of iron create a hostile aquatic environment for the invertebrates and fish in streams. Even where the concentration of metals is not high enough to change the appearance of water, metals may still be present and can severely affect the ability of aquatic creatures to live.
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