Abstract
The water qualities of 5 waterplants were studied by investigating the total bacterial colony, oxygen consumption, free oxygen, and the turbidity. The results showed that the quality of water from ground water in the Industry North Road waterplant is better than those in Yuqing and Quehua which derived from the Yellow River indicated tipical seasonal chang. The quality of the outlet is mainly affected by the quality of raw water. The correlation analysis indicated that total number of colony did not significantly correlated to other indicators.
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