The pH of natural water remains between 6.0 and 8.5, but could be affected by chemicals entering waterways ( Chapman and Kimstach, 1992). Water quality assessment can be best accomplished with the use of this parameter, as it affects many biological and chemical processes within a water body (Chapman and Kimstach 1992, p. 62) . Extreme pH affects the adaptation of many aquatic macroinvertebrates by disrupting their natural physical and environmental processes. Additionally, the availability of nutrients such as calcium and magnesium can be affected when the pH becomes too low compared to the normal river level..