Drinking water treatment (at 12.32 minute)
In the UK each of us uses an average of about 150 litres of
water per day. Most of it is taken by rivers, but before it
can be piped to our taps, it needs to go through a multistage
treatment
process. Rainfall is seasonal and increasingly unpredictable. So we often use storage
reservoirs to make sure there is always a supply for treatment