Quality Valuation of Direct Harvested Rainwater Near Nekede Landfill in Owerri West Local Government Area, Imo State, Nigeria

Abstract

Quality assessment of direct harvested rainwater at Nekede landfill in Owerri west Local Government, Imo State, Nigeria was examined. Some physicochemical and bacteriological parameters were analyzed. The WHO (2006) domestic, irrigation and rules for consumption standards was used to assess if the harvested rainwater is impure or infected. The water samples were collected from four sampling locations at a distance of 20 m away from each other. EP samples (March-April 2019) shows, turbidity ranged 5.0-5.20 NTU, Cl (3.40-3.90), Mn (0.05-0.09), NO3-N (8.40-9.90), PO43- (0.03-0.05) mg l-1 falls within the limit, Cu 1.0-1.10 mg l-1, Zn 3.00-3.10 mg l-1 falls within WHO standards only. Cd, Al and Co2 were above the standards, SAR and Na was Not detected (ND). PP (June - July 2019) shows turbidity, Cu, Cl, Mn, Ca, NO3- N, Na, and PO43- falls within the recommended standards. Cd (0.02), Al (0.02-0.06), CO2 (5.00-5.10) mg l-1 was above the standards, while SAR and Zn has (4.63-47.27) (3.00-3.20) mg l-1 falls within WHO standard and Mg (0.43-0.60) mg l-1 falls within FAO. E-Coli results on EP 20-32, PP 10-35 and Coliform count EP (ND), peak precipitation (1-10) falls within FAO standards, Salmonella EP and PP was above WHO and FAO standards. The bacteriological parameters indicates that the water is not fit for drinking, thus the water has been seriously contaminated with dangerous pollutants.