Steps in getting water ready to drink
Most urban drinking water is cleaned and treated in an ordered series of steps.
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.
Drinking water in urban areas is collected from a surface water source (river, lake or spring) or groundwater source (aquifer). The water goes through several processes to clean, treat and store it so it’s safe to drink when it comes out of the tap.
This interactive uses Hamilton City Council’s drinking water treatment plant as an example of the treatment process. Most urban locations will use similar steps to treat and store their drinking water. There are additional steps not pictured, such as backflow prevention, which stops any water flowing backwards in the treatment process. The water is carefully monitored before it is piped to homes and other locations.
Use your mouse or finger to drag and drop a text box onto the image that represents six of the steps in the drinking water treatment process. The steps are shown in the order that occurs during treatment.
If you want to redo an answer, click on the text box and the answer will go back to the bottom so you can move it to another image. Note: If the text box has not changed to blue, check it is fully within the image area. If you want to check your answers, use the Reset Incorrect button. This will reset incorrect answers only. When you are happy with your selection, use the Check Answers button to check them. Use Reset All to practise again from the start.
For optimal viewing of this interactive, view at your screen’s default zoom setting (100%) and with your browser window view maximised.
Use the Download Exercise button for a PDF version of this interactive.
See the activity Getting water ready to drink for additional support in using this interactive.
Acknowledgement
This resource has been produced with the support of Smart Water.
Smart Water
Smart Water is a partnership between Hamilton City Council, Waipā District Council and Waitomo District Council. Aiming to foster a greater understanding and appreciation of water from source to tap, it supports schools, organisations and the community to use water sustainably.
