(Drinking water pH values should be between 6.8-7.3) in General, the water discharged from factories, often with low pH values (PH < 7) which means there is a high acid corrosive. PH measurement made easy by using the litmus in the measurement of acid. – Bass, which, according to the intensity of the color [H +] or pH meter using measurements to make the resolution more. (Alkalinity) is a bass, weather conditions, water has a high bass consists of OH-ions, H 2 CO 3-CO3, calcium, magnesium, sodium, potassium, or element of the ammonia, which will help the weather acts like a buffer against changes in pH value of water. Saphapkrot (acidity) effluent from the general community will be in a buffer so no water bass has a value that is too low but pH effluent from industrial plants often have a lower pH value of 4.5, which comes from the dissolved CO2.
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