WATER QUALITY ASSESSMENT OF HAND-DUG WELLS IN APAPA LOCAL GOVERNMENT AREA OF LAGOS STATE

Abstract

This study examines water quality assessment of hand-dug wells in Apapa LGA of Lagos State. The aim of the study was to ascertain suitability of quality hand-dug wells. Thirty water samples were collected from hand-dug wells from varied locations from the three major land use types and measured for six physical parameters (FTU, DO, TSS, pH, EC, and TDS) - 2- 3- 3- and eight (8) chemical parameters (Cl , SO , NO , PO , Ca, Mg, Na, and K). The result shows that the quality of sample 4 4 groundwater was unfit and unsatisfactory for consumption. Some of the analysed parameters failed to conform to water quality index and water quality recommended standards. The pH of groundwater samples indicates slightly alkaline close to neutral condition (7.4). The FTU, TDS and EC (13.0, 1100.0, and 1642.0) of the detected level were slightly far above the WHO recommended limit. The O and TSS level detected were far less then WHO accepted recommended limit. Analyses of the chemical parameters shows that only the detected level of Na (210.16) was far above the recommended limit (200) while - 2- 3- 3- others (Cl , SO , NO , PO , Ca, Mg, and K) are all within the minimum and maximum range limit. The way forward is for 4 4 strict compliance to environmental laws, policy and recommend routine monitoring and further treatment of hand-dug wells for consumption.