How to Check for a Plumbing Leak When Your Water Bill Rises

A larger water bill is worth investigating, but the amount alone does not identify a leak. Begin with the dates and reported consumption. A useful record of normal demand and visible symptoms helps an assessor choose the next checks without assuming the source is underground.

Compare the same kind of period

Look at the billing dates, number of days and reported usage. Separate a change in consumption from a change in the total charge. Note whether the household, business or irrigation schedule changed during the period. If a reading or billing detail is unclear, ask the water provider to explain it.

Avoid comparing one unusually short period with a longer one as if they represent the same demand. A holiday, added occupant, new equipment or outdoor work can be relevant context. Record those changes rather than guessing what fraction of the bill they explain.

Notice common accessible sources

A toilet that continues filling, a dripping connection or an appliance-use change can matter. Describe what you can observe without dismantling plumbing. If irrigation shares the supply, note its operation and any persistent outdoor wetness. A controller being off does not establish that every buried valve or line is sound.

Moisture and water use may be related, but they can also have separate causes. A drain backup or rainwater stain does not by itself explain continuous loss from the drinking-water supply. Record the timing of each symptom independently.

Keep meter observations non-invasive

If the meter can be viewed safely without opening or altering utility equipment, a reading with normal demand stopped may be useful. Account for appliances and other automatic use. Do not operate unfamiliar utility valves, remove equipment or attempt a pressure test yourself.

Meter activity is an observation, not a precise leak location. Shared supplies and automatic equipment can complicate interpretation. Explain the arrangement and let the utility or an appropriate professional advise on the next step.

Match the investigation to the suspected system

A supply-loss assessment may involve isolation and suitable pressure or listening checks. A sewer camera addresses accessible drain interiors instead. Ask what each proposed check can establish and how its limitations will be reported. An unexplained bill is not a reason to open concrete before the affected system has been investigated.

Check the ownership boundary

For Charlotte Water connections, its [public and private service-line guidance](https://www.charlottenc.gov/water/Water-Quality/Lead-and-Copper) distinguishes utility infrastructure from the property-side service and internal plumbing. For a different provider, ask that provider about the actual boundary. Do not assume the utility will repair all pipework because it supplies the water.

Keep records for any adjustment enquiry

Save the bills, observations, assessment findings and repair description. If you want to ask about a leak adjustment, use the utility’s current process and confirm documentation and eligibility directly. A repair does not automatically create an entitlement to a credit.

Read high water bill leak diagnosis and underground water leak detection. Call (323) 916-2854 to discuss an address-specific assessment and availability.