The quality of water is getting decreased due to overexploitation. The present study was conducted to evaluate the drinking water quality of three different residential areas namely; Jallo More, Bhagbanpura, and Islampura in Lahore, Pakistan. Total ninety samples were collected, 45 from government filter plants (F) and 45 from their nearest tap water supply (T), and compared their various Physico-chemical parameters and heavy metals using standard methods. These parameters include temperature by using a mercury glass thermometer, pH, Electrical Conductivity (EC), Turbidity, total dissolved solids (TDS) by using specialized multimeters, total suspended solids (TSS) by filter paper method, Total Hardness by Complexometric titration, Total Acidity and Total Alkalinity by Acid-Base titration, Chloride Contents by Argentometric titration, sodium, potassium, calcium, and magnesium by flame photometer, and heavy metals such as iron, lead, copper by Atomic Absorption Spectrophotometer. The results were obtained in the following range; temperature (F=31-34°C, T=30-33°C), pH (F=7.03-7.82, T=7.12-7.73), EC (F=332-1584µS/cm, T=382-2850µS/cm), Turbidity (F=0.25-0.4NTU, T=0.35-0.48NTU), TDS (F=199.6-960ppm, T=397-998ppm) TSS (F=320-880ppm, T=300-970ppm), Total Acidity (F=80.06-205ppm, T=300-970ppm), Total Alkalinity (F=90.07-240.19ppm, T=140.1-370.26ppm), Total Hardness (F=75.06-410.32ppm, T=115.09- 395.31ppm), Chloride content (F=177.3-999.97ppm, T=312.04-1241ppm), Na (F=156.73-190.04ppm, T=184.38- 201.17ppm), K (F=0-7.92ppm, T=0-8.25ppm), Ca (F=74.31–139.2ppm, T=100-201ppm), Mg (F=11.56-25.33ppm, T=20.08-31.66ppm), Fe (F=0.20-0.85ppm, T=0.5-1.95ppm), Cu (F=1.26-1.97ppm, T=1.38-2.32ppm), Zn (F=0.04- 0.15ppm,T=0.03–0.08ppm), Ni (F=0.01-0.078ppm,T=0.05-0.074ppm), Pb (F=14-19ppb, T=19-27ppb), Cd (F=0-25, T=11-29ppb). The results obtained fell within the maximum allowable limit set by WHO and PAK-EPA for drinking water except for chloride content and Pb metal.