• 2020-11-10
• Olatunji O, Omogbehin S, Agunbiade O, Umar I.S
• Volume 2, Issue 2

Abstract

This study characterized the surface and ground water sources in Ondo town, Ondo State, Nigeria. It determined the physical properties, Nitrate compounds and Heavy metals in surface and ground water with regard to seasonal and spatial variations as well as bedrock geology in the study area. It also compared the investigated parameters with water quality of the samples with national and international regulatory standards. Fourteen (14) sampling stations comprising nine hand-dug wells, three bore-holes and two rivers were established for the study based on variations in bedrock geology, geographical spread, land use, urbanization and drainage pattern in the study area. Water samples were collected from each sampling area in dry and wet seasons. The physical parameters investigated were (temperature, turbidity and colour), nitrate, biological oxygen demand, dissolved oxygen, chemical oxygen demand) as well as heavy metals (lead, manganese, chromium, iron, zinc and copper). The parameters were determined using standard instrumental methods and non- instrumental methods with adequate quality assurance and quality control measures. Data obtained were subjected to appropriate descriptive, inferential statistics (ANOVA) and multivariate statistics (Cluster Analysis and Principal Component Analysis). This study revealed 64% of the parameters investigated had 100% compliance with the recommended values of World Health Organization (WHO) Drinking Water Quality and Nigerian Standard for Drinking Water Quality (NSDWQ) while among the heavy metals only Fe (210- 1720 μg/L) had 25% compliance.