25 samples - each of air and corresponding water were taken from slaughter halls in Assiut Abattoir and examined for total colony count, total coliforms, enterococci, staphylococcus aureus, slamonellae, as well as yeast and mould counts. Water in the slaughter halls was found to be contaminated with coliforms, faecal coliforms, enterococci, yeast and moulds. The aerobic plate count exceeds 2 X 100/100 ml water, while in air was 2 X 10^/m . E.coli, Citrobacter spp. and Klebsiella spp. were the most frequently isolated total coliforms from water samples, whereas in airborne state. Strept faecalis, Klebsiella and Citro bacter spp. were the most common. It was concluded that strept faecalis is considered as indication of airborne state, while coliforms of water contamination. The hygienic signifi cance of the isolated organisms was discussed.