Millions of households will see their water bills increase from next week - but there are ways to cut your costs. In England and Wales, water bills will rise by an average of £33 a year, or 5.4%, from April 1. Your bill can be calculated either by measuring the amount of water you use, if you have a water meter, or by using the value of your property. Your bill will also depend on where you live, as there are different rates and charges for different regions. Water companies were previously