BACTERIOLOGICAL AND PHYSICOCHEMICAL QUALITY OF GROUNDWATER IN THE SURROUNDING ENVIRONMENT OF SOLOUS LANDFILL, IGANDO

Groundwater contamination occurs from urban activities, industrial discharges, agricultural activities, landfill leachates, and effluent from wastewater treatment plants that have progressed over time without any regards for environmental consequences .The quality of groundwater around Igando area, Lagos State, Nigeria was investigated with the aim of detecting possible influence of solous dumpsite on Bacteriological and Physicochemical quality of groundwater in surrounding environment. Twenty-one (21) samples from 19 borehole taps and 2 wells were
collected from different distances from the landfill site. sampled. Physicochemical and bacteriological parameters of the water samples were analysed using standard procedures. Total heterotrophic coliforms and fecal coliforms counts were carried out using standard microbial procedures. The distance of groundwater samples to the landfills in these studies were between 10-1027m. The colour ranged from colourless, yellowish to brownish. The pH, temperature, conductivity, total dissolved solids (TDS) and salinity which ranged from 4.025-6.77, 28.4-290C, 27-10,030, 30.9-7,165mg/l and 0.5-5450ppt, respectively. Total heterotrophic counts ranged
from 1-316cfu/ml while coliforms counts ranged from 0-1800cfu/ml. Fecal coliforms detected were in 11(52%) of the samples, cadmium contents ranged from 0.909-9.673ppm while magnesium was not detected in any of the water samples. This study shows that 76%, 23%, 85%, 81% and 85% of the groundwater samples do not meet up with the World Health Organization standards for pH, color, conductivity, Total dissolved solids and salinity respectively. Conclusively groundwater obtained from soleus landfill environment are contaminated and therefore, not fit for human consumption