Scientific Research and Essays

  • Abbreviation: Sci. Res. Essays
  • Language: English
  • ISSN: 1992-2248
  • DOI: 10.5897/SRE
  • Start Year: 2006
  • Published Articles: 2755

Full Length Research Paper

Assessment of groundwater quality in unconsolidated sedimentary coastal aquifer in Lagos State, Nigeria

Adebo B. A1,2* and Adetoyinbo A. A.2
  1Faculty of Information and Applied Sciences, Lead City University, Ibadan, Nigeria. 2Department of Physics, University of Ibadan, Ibadan, Nigeria.
Email: [email protected]

  •  Accepted: 18 February 2009
  •  Published: 30 April 2009



This study assesses the quality of ground water from nine different borehole locations in Lagos State, Nigeria. Borehole water samples were carefully collectedfor physico – chemical analyses. Calcium, magnesium, iron, zinc, copper,manganese, aluminium, and silver, Nitrate, phosphate, fluoride,  chloride, pH, conductivity, total dissolved solid, total suspended solid, hardness, summation of ions as well as the temperature and colour were assessed among the entire samples collected. The results shows that: temperature ranges from 26.6 - 27.8°C, pH (7.27), average conductivity (462.2 μs/cm), TDS (204.73 mg/l), Total hardness (18.48 - 297.70 mg/l) and Chloride concentration (343.3 mg/l). However a high value of chloride,  343.3 mg/l, was recorded in one of the water sample collected but, this is higher and above the limit of WHO guidelines of portable water (250 mg/l). This may be due to the proximity of the area where the sample was collected to the sea. Five samples  of the water are is soft, that is, hardness was within a range of 0 – 75 mg/l recommended for safe drinking water, one is moderately hard while three samples are hard. Also the presence of metals such as zinc, manganese, sodium, copper and magnesium were also observed. Results show that not all the water samples are safe for drinking purposes.


Key words: Borehole water, physico–chemical parameters, water quality, Lagos State.