Hydrochemistry; Compliance And Comparative Case Study of Public Water Works In Enugu And Ebonyi States, Southeast of Nigeria

Abstract

Abstract The compliance and comparative case study of public water works in Enugu and Ebonyi State of Nigeria was carried out in this study. The water samples were collected at Ajali water treatment plant Enugu State (Sample A), 9 Works road GRA, Enugu State (Sample B), Ezilo water Scheme Ebonyi State (Sample C) and Ameke in Ezilo Ebonyi State (Sample D). Ten physicochemical parameters and water like- metals such as SO42−, Cl−, NO3, Mg2+, Ca2+, Na+, Pb, Ni, Cr, and Al were determined in rainy season in for one year. The results shows that chloride (Cl−), (A = 97 mg/l, B = 121 mg/l, C = 97 mg/l, D = 119 mg/l); nitrate, (A = 3.11 mg/l, B = 1.29 mg/l, C = 1.10 mg/l, D = 0.70 mg/l); total phosphate, (A = 1.97 mg/l, B = 0.26 mg/l, C = 0.32 mg/l, D = 0.42 mg/l); Biological oxygen demand (BOD), (A = 0.25 mg/l, 6.00 mg/k, C = 1.10 mg/l, D = 7.40 mg/l); Chemical oxygen demand (COD), (A = 50.67 mg/l 10.67 mg/l, C = 30.39 mg/l, D = 26.67 mg/l); Electrical conductivity (EC), (A = 100 µs/cm, B = 30 µs/cm, C = 200 µs/cm, D = 250 µs/cm); and pH, (A = 7.60, B = 6.62, C = 5.50, D = 5.90) mostly conform to the WHO set standard for drinking water. While TS, TDS, and TSS were (A = 205, B = 535, C = 151, D = 183 mg/l), (A =,60 B = 555, C = 121, D = 128 mg/l) and (A = 145, B = 280, C = 30, D = 55 mg/l) respectively. Further more, the results of the heavy metal analysed showed that; Lead (Pb) was not detected in all water samples; Nickel (Ni) was observed to be 0.07 mg/l in the water sample collected from Sample A; Sample B contained 0.03 mg/l; Sample C not detected while in Sample D, it was 0.04 mg/l;. Chromium (Cr) was observed to be 0.01 mg/l in Sample A, it was not detected in both water samples B and C but was 0.02 mg/l in Sample D; which means that all the water samples studied conform to the WHO set standard for chromium in drinking water. Aluminium (Al) was observed to be 0.05 mg/l, 0.01 mg/l, Not detected and 0.03 mg/l in water sample A, Sample B, Sample C and Sample D. There is a variation in the Mg2+ in Ebonyi water. Hpwever, It was observed that the physical parameters of the water samples analysed were within the World Health Organisation (WHO) set standard for drinking water.