This study was carried out to examine the effect of abattoir activities on ground waters around Bodija and Akinyele abattoirs in Oyo state. The work was premised on the fact that untreated wastes from the abattoir are discharged directly into open drainage which flows into a nearby stream. Sixty structural questionnaires were administered and retrievedin the study areas with thirty used in each of the two abattoirs. The survey shows that 100% of the abattoir operators in both abattoirs disposed wastes manually using spade, 90% sweep and wash the wastes into open drainages as 90% do treat their wastes before disposal at the dumping site. Physical, chemical and microbiological analysis of water samples from the well around the two abattoirs revealed no significant different in the two abattoirs. Turbidity, Total dissolved solid (TDS), and total suspended solid (TSS) were significantly higher in Akinyele abattoir than Bodija abattoir. Total coliform count (TCC) was 6.3x105 in the well aro