Groundwater Quality Assessment of Ikorodu Local Government Area of Lagos State in Nigeria
Oritsedere Pessu
Centre for Occupational Health, Safety & Environment, Institute of Petroleum Studies, University of Port Harcourt, Nigeria.
John N. Ugbebor
Centre for Occupational Health, Safety & Environment, Institute of Petroleum Studies, University of Port Harcourt, Nigeria and Department of Civil & Environmental Engineering, University of Port Harcourt, Nigeria.
Ejikeme Ugwoha *
Centre for Occupational Health, Safety & Environment, Institute of Petroleum Studies,University of Port Harcourt, Nigeria and Department of Civil & Environmental Engineering, University of Port Harcourt, Nigeria.
*Author to whom correspondence should be addressed.
Abstract
An assessment of the quality of groundwater in Ikorodu Local Government Area (LGA) was carried out in September 2020 (Late wet season). A total number of 29 samples were collected from different selected locations of the study area. The samples were collected from private and government bore holes. The pH, Total dissolved solids (TDS), Salinity, Turbidity, Hardness, Biochemical oxygen demand (BOD), Chemical oxygen demand (COD), Phosphate, Nitrate, Sulphate, and Total bacterial count (TBC) were determined according to American Public Health Association (APHA) standard techniques. The results showed that the mean pH, TDS, Salinity, Turbidity, Hardness, BOD, COD, Phosphate, Nitrate, Sulphate, and TBC in the water samples were 7.0 ±0.59, 176.0 ±132.2mg/L, 0.14 ±0.11g/kg, 0.32 ±0.05 NTU, 59.58 ±34.89mg/L, 11.59 ±3.41mg/L, 14.90 ±4.18mg/L, 0.97 ±0.46mg/L, 2.62 ±1.27mg/L, 9.44 ±5.94mg/L, and 4.92 ±2.94 x 102 cfu/mL, respectively. The calculated Water quality index (WQI) of the different sampling points showed the least WQI was 50.3 and the highest WQI was 66.9. Overall, the WQI indicated “Poor” quality of groundwater in the Ikorodu Local Government Area of Lagos State.
Keywords: Water quality index, groundwater quality assessment, physicochemical analysis, biological analysis, Ikorodu