Background: Many potential pathogens could be acquired from swimming pool water duringrnbathing. Hence microbial examination of swimming pool water samples is necessary to ensurernthat the water is safe for swimming. As it is impractical to screen all samples for all possiblernpathogens, indicator organisms have been used as surrogate markers of risk.rnObjectives: The study aimed at assessing the physico-chemical (chlorine, PH, temperature)rnand microbiological conditions of swimming pools and evaluating the compliance ofrnthese pools with the WHO standard.rnMethods: A cross sectional study was conducted from February for four months(2016-Mayrn2016).A total of 60 swimming pool water samples from 10 swimming pools (6 from eachrnpool)were collected on a weekly basis for physicochemical and bacteriological analysis usingrnthe MPN method. PH, residual chlorine and Temperature of the swimming pool water samplesrnwere measured. In addition, total viable count and coli form count (total coli form, fecal colirnform and (E.coli) were determined. Chi-square test was used for association and data wasrnanalyzed using SPSS Version 20.Results were compared with the WHO recommended limits forrneach parameter.rnResults: The swimming pool water samples had average pH and temperature of 7.1 and 29crnrespectively.58.4%(n=35/60) of the samples had PH in the range of 7.2-7.8 whilern58.3%(n=35/60) of samples had temperature in the range of 21c-32c.25%(n=15/60)of thernswimming pool water samples had residual chlorine in the range of 2-3mg/l.73.3%(n=44/60) ofrnswimming pool water samples had a total viable count below 200cfu/ml and 70 %(n-42/60) ofrnswimming water samples had TCC values less than 2MPN/100ml.More over, 66.7%(n=40/60)rnof the samples had fecal coli form counts falling bellow 1MPN/100ml.E. coli was present inrn30%(n=18/60) of swimming pool water samples while it was absent in 70%(n=42/60) poolrnwater samples. It was also found out that PH and residual chlorine had association with potrnability while temperature was not.rnConclusion: It was observed that 70% (n=42/60) of the swimming pool water samples metrnthe WHO microbial standard while 30%(n=18/60) did not.rnKey words: Swimming pools, microbial contaminations, Addis Ababa, Ethiopia.