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Assessment of drinking water quality was done by selecting Nine Government senior secondary schools of three blocks in Solan district of Himachal Pradesh. The water quality parameters such as physical, chemical and biological parameters of water samples were analyzed. The water quality parameters such as temperature, pH, EC, TDS, temperature, BOD and COD ranged from 18.3 to 21.2°C,6.95 to 7.13, 0.24 to 0.51 dS m^-1, 107.90 to 194.02 mg l^-1, 0.69 to 2.26 mg l^-1and 56.50 to 119.75 mg l^-1; trace elements (As, Cd, Zn, Pb, Cu, Mn and Ni) nil, 0.000 to 0.001 mg l^-1, 0.001 to 0.003 mg l^-1, 0.00 to 0.01 mg l^-1, 0.00 to 0.02 mg l^-1, 0.03 to 0.06 mg l^-1l和0.00至0.02毫克^-1respectively and biological parameters like total coliform as 20.00 to 54.00 MPN ml^-1, which were within the permissible limits except Fewhich ranged from 0.63 to 0.95 mg l^-1was above the permissible limits. The water quality index of drinking water for nine schools was in the rangeof 25.80 to 36.38,which categorized as excellent.