An easy way to save the UK 2,912,000,000 litres of water each day!
This could apply to any country with modern sanitation:
Given the degree of drought in the UK, I think it's time we Brits ramped up our water-saving habits.
The average adult goes to the toilet (number 1) six to eight times each day.
The average toilet cistern in modern British homes holds six to nine litres of water per flush.
Britain has approximately 52 million adults.
If we assume that each adult is flushing the toilet (after each number 1) consistently, then an adult in Britain is flushing approximately 56 litres of clean water down the toilet each day (taking the number of number 1s each day to be seven, and the average cistern storage capacity as eight litres (many older household toilets can store upwards of ten litres, so I'm assuming slightly higher than average for modern toilets)).
This equates to 2,912,000,000 litres of fresh water down the drain each day in Britain (and this only assumes adults are flushing).
Instead, why not flush the toilet only after doing a number 2? We'd save a lot of water!
Obviously, this water comes from the water supply lines, so we would still need a way to get this excess water to areas affected by drought. At the very least, people might save a little on water bills.