Groundwater quality assessment near Nullah Lai stream of Pakistan

This study was carried out to evaluate the groundwater quality of tube wells along the length of Nullah Lai, the main sewer line of the Federal area of Pakistan. Water samples from eight locations were taken from the nearby tube-well sources of the public water supply, and analyzed for the water quality parameters using standard procedures. About twelve different physcio-chemical and biological water quality parameters were studied, depending upon their importance in the subject area. The results obtained indicated that the water quality is within the limits of the available water quality standards in terms of physical and chemical parameters, but is very much contaminated with microbial pollutants, which needed to effective disinfection prior to drinking usage. The maximum pH, turbidity, TDS, Nitrates, Chloride, and Total Coliform recorded in the studied area was 8.2, 3 NTU, 645 mg/L, 9 mg/L, 362 mg/L, and 47 MPN/100 mL, respectively. The results of this study suggested that the drinking water sources of the surrounding vicinity were at greater risk in terms of pollution carried by the Nullah Lai stream in Pakistan.