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Acid Rain Experiments – Experiment 4 – Measuring the pH of Natural Water

In this experiment, you will measure the pH of natural water located near your home or school.



  1. Locate a stream, river, lake, or pond. Go with an adult.
  2. Scoop some of the surface water into a cup.
  3. Measure the pH of the water using either pH paper or a garden soil pH testing kit and record the result.

Questions and Answers

How acidic is the water?

Based on where you live and what you have learned about acid rain, are you surprised by the result? Discuss the findings with your parents or teacher.

How does the measured pH compare to the pH levels that affect plants and animals in aquatic habitats?

See the chart explaining how acid rain affects animals living in the water.

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