The size of grain and analysis of heavy metals in sediments, waste, and benthic organisms from the Oshunkaye stream due to heavy effluent from the Bodija abattoir are investigated with samples taken from six different sampling points. The mean size analysis in all six sampling points is sand, very rough grain, and rough grain particle sizes between Phi -2.0 to 1.0. The skew values of the sediment size in the samples showed mostly coarse skewed and strongly coarse skewed between -1.0 and 1.0. The highest levels of heavy metals were predominantly found at sampling points 1, 4, and 6. Point 1 is located at the point of discharge of abattoir waste, while points 4 and 6 are situated downstream after the discharge. In contrast, the lowest levels were recorded at points 2 and 3, which are located upstream, before the discharge of abattoir waste. This indicates that waste from the Bodija abattoir negatively impacts the physical, chemical, and biological parameters of the Oshunkaye stream, thereby posing a health risk to individuals living in the surrounding area.  

 

Key words: Heavy metals, benthic organism, Bodija abattoir waste, Oshunkaye Stream.