When an unexpected change in your water bill occurs, this can be a sign that something is amiss in your plumbing. Unless your water use changes expectedly due to using an irrigation system, filling a pool or spa, or other unusual circumstances, an increase in water bill charges should be viewed as a warning. If you have a water bill that is suddenly higher than normal, pay attention. You may have a serious plumbing leak which needs repaired that is causing this increase in water bill charges and needs immediate attention.