When finding water quality, there are many measurements that can be made. In this experiment, you will measure water temperature, conductivity, and pH. Water temperatures in streams can range from 0°C in the winter to above 30°C in the summer. Cooler water in a stream is generally considered healthier than warmer water. Problems generally occur when changes in water temperature are noted along one stream on the same day.


  • Use a Temperature Probe to measure water temperature.
  • Use a Conductivity Probe to measure the conductivity of water.
  • Use a pH Sensor to measure the pH of water.
  • Make visual observations at the test sites.
  • Compare water quality.