Grade level: 4-12
Subject areas: Environmental science, math, chemistry

Summary:
Using prepared sample solutions and test strips, students will measure the sample’s pH, alkalinity and chlorine to determine which one is safe enough to drink.

Students will discover that through a series of simple tests, they can determine which water sample is safe to drink. They will discover that the Philadelphia Water Department also runs a series of scientific tests on a regular basis to ensure good quality drinking water.