The Use of Statistical Quality Control Tools to Access the Quality of Water Produced. A Case Study of Dalung Headworks, Ghana Water Company Limited –N/R

Abstract

Considerable Water can be said to be one of the most important social amenities in the world. Humans, animals and plants alike depend on water for a lot of uses. For such a valuable commodity, it would be necessary to ensure that its production meets quality standards, so as to prevent the spread of water-borne diseases. Addition of various chemicals to remove impurities must also be controlled. There are choices of methods through which quality in many manufacturing processes could be checked. The leading objective of this project was to determine the quality of treated water supplied to urban areas from the Ghana Water Company Limited. The case study was the Dalung Headwork in the northern region, which supplies water to Tamale metropolis and its environs. Methods used to analyze the data were statistical quality control tools by the aid of SPSS, specifically, control charts.Using Range and Mean control charts, it was discovered that all stages of the water production process were statistically out of control, and there were large variations due to avoidable or assignable causes.

Keywords: Accessing water quality, statistical quality control methods, Ghana-northern region