The pH ranged 5.8 - 6.5. Each station has almost the same pH. Station 1 sampling 2 denoted low pH (5.8). This
might relate to the activity of bathing, washing, latrines along the water bodies. The residue from those activities
carried organic material and was decomposed by microorganisms. The process also consumed oxygen and released
carbon dioxide. When water sample had taken (sampling 1), the rain fell. Hence, the water pH tended to acidic [11].
GR No. 82/2001 (class II) requires pH of 6-9; therefore pH of three stations reached the criteria of quality standard,
but at the station 2 sampling 1, pH was out of the quality standard.
Dissolved oxygen (DO) is the concentration of oxygen dissolved in the water. Its presence is essential to maintain
variety of biological life forms in water and the effect of waste discharge in a water body is largely determined by
oxygen balance of the system [5]. Natural water bodies have high levels of oxygen which varies depending on
temperature, salinity, water turbulence, and atmospheric pressure [6]. The colder the water, the more oxygen it can
hold [12]. DO ranged 6.91 -9.98 mg/l. The three stations has almost the same DO and still in good criteria.
Dissolved oxygen is necessary for the survival of aquatic organisms. The low DO indicates high demand for oxygen
by the microorganisms [13]
The more organic materials that pollute the water body, the more amount of oxygen consumed to decompose
these materials so that the content of dissolved oxygen in the water decreases so low [14]. It can also be caused by
the study location that is on plateau with low temperature. DO is higher in high altitude than the low altitude [15].
GR No. 82/2001 (class II), DO must be >4 mg/l, hence the DO of the three observation stations reached the quality
standard.
The pH ranged 5.8 - 6.5. Each station has almost the same pH. Station 1 sampling 2 denoted low pH (5.8). Thismight relate to the activity of bathing, washing, latrines along the water bodies. The residue from those activitiescarried organic material and was decomposed by microorganisms. The process also consumed oxygen and releasedcarbon dioxide. When water sample had taken (sampling 1), the rain fell. Hence, the water pH tended to acidic [11].GR No. 82/2001 (class II) requires pH of 6-9; therefore pH of three stations reached the criteria of quality standard,but at the station 2 sampling 1, pH was out of the quality standard.Dissolved oxygen (DO) is the concentration of oxygen dissolved in the water. Its presence is essential to maintainvariety of biological life forms in water and the effect of waste discharge in a water body is largely determined byoxygen balance of the system [5]. Natural water bodies have high levels of oxygen which varies depending ontemperature, salinity, water turbulence, and atmospheric pressure [6]. The colder the water, the more oxygen it canhold [12]. DO ranged 6.91 -9.98 mg/l. The three stations has almost the same DO and still in good criteria.Dissolved oxygen is necessary for the survival of aquatic organisms. The low DO indicates high demand for oxygenby the microorganisms [13]The more organic materials that pollute the water body, the more amount of oxygen consumed to decomposethese materials so that the content of dissolved oxygen in the water decreases so low [14]. It can also be caused by
the study location that is on plateau with low temperature. DO is higher in high altitude than the low altitude [15].
GR No. 82/2001 (class II), DO must be >4 mg/l, hence the DO of the three observation stations reached the quality
standard.
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