Take two different water samples from two different bodies in a clean test tube.Label them as A and B.Dip the pH stripes in both the test tubes, which have different water samples.Keep the strips on the tile and let the strips dry.Simultaneously, pH levels of the water samples can also be found through the Universal Indicator Solution or (UI solution).With the help of a dropper, take five drops of UI solution in both A and B test tubes.Note the change in colour of both water samples in A and B, and compare them with the colour chart to identify the pH level.