Global Journal of Science Frontier Research, H: Environment & Earth Science, Volume 23 Issue 2

tables. This technique is known as the MPN method. A questionnaire was administered to 100 resi- dents of Nalerigu who were within 50m from the damand 135 residents [29]to ascertain the perception of resi- dents about the quality, usefulness or otherwise of the dam. = 2 (1 − ) 2 ( − 1) + 2 (1 − ) � ………………………… (1) Variables: The respective variables have been given their explanations below. = 2 = ℎ − 1 ( ) (3.841) = ℎ = 135 = ℎ ( 0.5 ℎ ℎ ) = ℎ (0.05) From the information above; S = 3.841(135)(0.5)(1 − 0.5) (0.05) 2 (135 − 1) + (3.841)(0.5)(1 − 0.5) � = 129.63375 1.31025 � = 98.9382 = 99 (Approximately) The data obtained was analyzed using SPSS 16.0 for the physicochemical parameters, Microsoft Word and Minitab 16.0 for the public perceptions. Tables were used to present the findings. IV. R esults and D iscussion a) Physicochemical Parameters for the Dam Water Within the Sampled Period A total of 3 samples were investigated for this work. The water samples from the dam were analyzed in order to compare their levels to WHO water standard for drinking water. The average physical and chemical properties and nutrient content of the dam water sam- ples including pH, electrical conductivity, turbidity, alka- linity, hardness, total dissolved solids (TDS), total sus- pended solids (TSS), colour, chloride, iron content from these sample points are shown in Tables 1, 2 and 3. i. Temperature The mean temperature for all the sampling sites ranged from 30.3 and 30.5 ℃ with the highest tempera- ture of 30.5 ℃ recorded at sample A and the lowest tem- perature of 30.3 ℃ recorded at sample B (Table 1). The little variation in temperatures in the dam water shows some uniformity of the dam water temperature in the study area. ii. Hardness Average total hardness for the dam water sam- ples ranged from 5.0 to 6.0 mg/L (Table 1). The highest value was recorded at sample points A and B and the lowest at sample point C. The least Calcium hardness value of 2.00 mg/L was recorded for sample points A and B and the highest value of 3.00 mg/L. Calcium hardness was recorded for sample point C. also mag- nesium hardness was determined for all three samples with average values ranging from 2.00 mg/L for sample point C to 4.00 mg/L for sample points A and B. The hardness values were low which indicates that the water samples were all soft and within the WHO permissible limit of 500 mg/L. Hardness of water may not have any health implications but may affect the taste of water as well as influence its lathering ability by forming scum with soap when used for washing. Table 1: Mean Values of Physico-Chemical Parameters and Nutrients at Nalerigu Dam Sample Point Temp ℃ pH T Hardness mg/L Ca Hardness mg/L Mg Hardness mg/L WHO Limit 6.5-8.5 500.00 Sample Point A 30.5 6.40 6.00 2.00 4.00 Sample Point B 30.3 6.50 6.00 2.00 4.00 Sample Point C 30.4 6.30 5.00 3.00 2.00 pH- The mean pH ranged from 6.30 to 6.50 with the highest pH of 6.50 occurring at sample B and the lowest pH of 6.30 at sample C (Table 1). The pH values for all the three samples analyzed, two samples (A and C) fell 1 Year 2023 8 © 2023 Global Journals Global Journal of Science Frontier Research Volume XXIII Issue ersion I VII ( H ) Assessment of Water Quality of the Nalerigu Dam in the East Mamprusi Municipality of the North East Region of Ghana the confirmatory test, using specially devised statistical uses the water for domestic purses from a population of