Contamination of water bodies due to anthropogenic activities of man has been a major concern to mankind particularly in developing nations where regulations put in place by government are either not obeyed or no stringent regulations to monitor and punish the offenders. The biological wealth of a water body is mainly dependent on its physico-chemical parameters' quality. The Physico-chemical qualities of two waterbodies (Bayeiku and Offin Rivers) in Ikorodu division of Lagos State, Southwest Nigeria were sampled and analysed with the intension of determining the extent of pollution and the health of the water bodies. Five sampling stations each were established on both rivers and samples collected monthly for six months (March to August 2018). The physicochemical parameters were analysed using standard methods by APHA
The parameters assessed are temperature, pH, turbidity, conductivity, hardness, salinity and dissolved oxygen (DO). The obtained result revealed that the average value of the parameters analyzed are; turbidity (29.71±23.03 NTU), conductivity (401.94±576.52 µS/cm), DO (33107.92±59091.09 mg/L), hardness (33107.92±59091.09) and that these values are above the WHO allowed limits except for temperature (29.09±1.65°C), pH (7.59±0.34) and salinity (3.05±3.45). One-way analysis of variance (ANOVA) and the 95% confidence level revealed that the value of each parameter was not statistically significantly different (p ˃0.05) from one site to another. The variation of each parameter observed along the river was as a result of pollution from activities that take place along the river bank and the vicinity of the river.