Getting water ready to drink
If you live in a town or city, have you ever wondered where your drinking water comes from? Water is collected from a natural source, then has to go through a treatment process. Treating drinking water is a complex and expensive task, requiring many resources.
In this activity, students learn about water treatment processes for drinking water in Waikato. Explore the steps in the process and the inputs and outputs.
Steps in getting water ready to drink
Step 1 Collection and screening
Step 2 Sedimentation
Step 3 Sand filtration
Step 4 Carbon filtration
Step 5 Disinfection UV
Step 6 Storage and usage
Unused items
- Water is pumped from the source and screened to remove large debris like leaves.
- Chemicals are added to clump impurities together and remove them.
- Fine sand is used to filter out remaining floc (impurities) in the water.
- Activated carbon granules absorb unwanted particles, smells and algae.
- UV and chlorine remove remaining microorganisms like harmful bacteria.
- Water is pumped to reservoirs, which store it until needed.
Steps in getting water ready to drink
Most urban drinking water is cleaned and treated in an ordered series of steps.
This activity is part of a suite of resources that support Smart Water – a context for learning, which provides students and teachers with opportunities to connect with water and learn more about drinking water in the Waikato region. The science and mātauranga concepts that underpin Smart Water are transferable to other locations in Aotearoa New Zealand.
By the end of this activity, students should be able to:
order the steps in the drinking water treatment process
describe the purposes of water treatment.
Download the Word file (see link below).
Nature of science
This activity relates to the Nature of Science ‘Investigating in science’ strand. Students ask questions, find evidence and explore simple models to find out how drinking water is sourced and treated.
