A larger bill can be a warning sign that you have a leak. We suggest that you check your meter when no water is being used and if the meter is still moving, then you have a leak and you should call a plumber as a matter of urgency as you are still responsible for the water usage, even if it is a leak. If there is no leak, a larger bill could be due to an increase in employees or an installation of new equipment. You could also have dripping taps or overflows.
You can also provide us with a meter reading, (Submit a meter reading) and we will check your bill.