Water quality monitoring is carried out by measuring the levels of many physical, chemical and biological water quality parameters. This is usually done either by measuring the parameters in the site (e.g. temperature, dissolved oxygen and pH) or by collecting samples and analyzing them in the lab (e.g. coliform bacteria, nitrogen and phosphorus). Consequently, the changes in the water quality parameters can be identified and the possible reasons for such change can be assessed. Many illegal waste discharges to the water bodies are detected by water quality monitoring and assessment. Accordingly, regular water quality monitoring of both surface and groundwater is essential to follow up the change in the quality status of these water bodies and to assess the suitability for using the water for different purposes such as drinking, swimming and for industry.