A. dissolved oxygen
Water is contaminated with low dropout rates, because the oxygen contained in the water will be used by bacteria to decompose pollutants.
B. Dissolved solids
Water is an effective solvent, it must be that the water soluble substances are innumerable. Substances dissolved in water vary depending on the area where the water is located.
C. Biochemical oxygen demand
BOD stated amount of oxygen required by microorganisms to decompose the impurities contained in water for 5 days at 20 degrees celcius.
D. sediment
Precipitate is formed from the broken-rock debris due to mechanical or chemical processes.
E. PH or exponent
Is a measure of the degree of acidity of a solution. Pure water at normal pH = 7 has a price. In general, water in nature has a PH rates between 6.5 to 8.
F. temperature
The higher the temperature the greater the water solubility of the substance, except for the gas solubility is reduced.
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