Water Quality Index for the Evaluation of Water Quality from Different Source: A Case Study of Lafia

Water must be significantly free from dissolved solid, plant and animal waste and bacterial contaminants in order to be safe for human use. The Water Quality Index method was used to assess the water quality of several water sources (well and borehole) in the Lafia district of Nasarawa state. In order to determine if groundwater in the study region is suitable for residential use, the current inquiry was conducted to calculate the Water Quality Index. Numerous physico-chemical and biological data, including pH, chloride, sulphate, nitrate, calcium, feacal streptococcus, total coliform, and magnesium, were used to calculate WQI. The computed WQI result, which falls into the Good (Acceptable), Bad, and Very Bad (Rejected) classes, varies from 0 to 58.9 in one instance and from 0 to 98.0 in another, based on the empirical formulas for the groundwater samples. A distinct index range was produced by each parameter. Findings from the research revealed that all wells & borehole sampled have high faecal streptococcus above the recommended level for drinking water, thereby requiring the need for urgent public health intervention