The monthly cost of water depends on where you live and how much water you use - the more you use, the more you’ll pay. Unfortunately there’s no switching market for water - the supplier for your area is the supplier you have to use - and the cost of water is rising in the UK in line with other utilities like energy. Costs in some regions are also higher because they’re larger and require more infrastructure to be maintained to ensure that water can be transported to the homes, businesses and commercial buildings that need it.