ABSTRACT This study was focused on the microbiological and physicochemical evaluation for tap water which collected from six districts namely, Fayoum City, Senoris, Tamiea, Ietsa, Abshway and Youssef El-Sedeek in Fayoum Governorate during summer and winter seasons 2018/2019. Results indicated that, in general, all tested water samples showed high appearance rate of total bacterial counts (log cfu/ml) at incubation of 37⁰C than incubation of 22⁰C. The highest bacterial counts were recorded for both incubation at 22⁰C and 37⁰ C during summer. Total coliform, faecal coliform as well as faecal Streptococci were absolutely absent in all tested samples during both seasons. No detectable bacteria (Staphylococci sp., Peudomonas sp. Aeromonas sp., Salmonella,sp. Vibrio sp., listeria sp. , as well as yeast and fungi in all tested water samples. Also, results  showed that, in general, temperature and pH as well as electric conductivity (EC), total hardness , total dissolved salt (TDS) values were fluctuated between 16-34 ⁰C, 6.7- 7.8, 0.30-0.49 mg/L, 40-60 mg/L.,3.83-31.83 mg/L respectively. In addition, results indicate that, the values of calcium, magnesium, sodium , potassium, chloride and sulphate values were ranged  15.37-35.72 mg/L, 25.19-43.32 mg/L , 16.33- 31.97 mg/L, 6.28- 14.8 mg/L, 29.24- 48.52 mg/L and 55.52- 91.52 mg/L respectively in all tested tap water samples at different location. No carbonate detection in all tested tap water samples except low concentration (0.1mg/L) was obtained in summer in Senoris. The highest and lowest bicarbonate values were recorded in winter in Youssef EL-Sedeek and Senoris respectively. Also, results indicated that, no ammonia was detected in water samples in winter in Senoris, Tamiea and Youssef EL-Sedeck. The lowest value of ammonia was obtained in winter in Ietsa but the highest value was recorded in summer in Fayoum and Abshway cities.Nitrate concentrations in tap water in summer season ranged (0.01mg/L) and (0.22 mg/L). In winter, nitrate contents ranged between (0.003 mg/L) and (0.09 mg/L) No nitrite content was detected in Fayoum and in Senoris cities in both two seasons. The highest value (0.6 mg/L) was recorded in summer in Abshaway, but the lowest value (0.05 mg/l) was obtained in winter in Abshway too. The highest value of total phosphorus was recorded in summer in Fayoum while the lowest value was observed in winter in Youssef EL-Sedeck. No lead detected in all tested water samples in both seasons except, very low lead concentration (0.007 mg/ml) was detected in Ietsa in summer. No cadmium was detected in all tested water samples in both seasons of the study. No copper were detected in all water samples under investigation in winter. While in summer, copper values ranged between (0.01mg/L- 0.05 mg/L) and the lowest value was obtained in Fayoum but the highest value was in Abshaway.