Assessment of the impact of abattoir effluent on the quality of groundwater in a residential area of Omu-Aran, Nigeria

Background: Water pollution from abattoir efuents may create substantial environmental and public health hazards. Available literature is scanty on the quality of groundwater located near abattoirs in tropical developing countries like Nigeria. This study, therefore, accessed the impact of abattoir activities on the quality of groundwater in Omu-Aran Nigeria. Methods: A total of eighteen water samples were taken from fve privately own wells and one control well located at varying distances and elevations to the abattoir. The physicochemical characteristics of the water were determined using the standard methods. Data were analyzed using descriptive statistics and ANOVA. Results: The mean values of parameters in the water samples collected from the studied wells ranged from 5.80±0.20 to 7.23±0.55 mg/L, 12.0±1.0 to 26.0±2.0 mg/L, 0.06±0.02 to 0.16±0.02 mg/L and 208.0±24.25 to 254.67±12.22 cfu/mL for dissolved oxygen, biological oxygen demand, lead and total coliforms, respectively. There was a signifcant diference in the quality of water from the studied and control wells in the parameters except that of total coliform. The quality of the groundwater improved with increasing distance from the abattoir. Conclusions: Findings revealed that abattoirs have the potential to impact the quality of groundwater. Therefore, careful consideration is required when choosing a location for siting new abattoirs. For existing ones, particularly those close to residential areas, efective pollution control measures should be put in place to protect groundwater. Keywords: Ground water quality, Water pollution, Omu-Aran and abattoir efuent