Is a Water Leak Before or After Your Water Meter? How to Tell and Who Pays.

Why the meter is the dividing line.

Water utilities measure what you use at the meter. Everything between the street main and the meter is part of the utility's system. Everything between the meter and your fixtures is yours. In practice the boundary can sit at the curb stop or at the meter, depending on the utility, so confirm yours.

A leak before the boundary does not show up on your meter at all, because the water has not reached it. A leak after the boundary does show up, and you pay for it. That asymmetry gives you a simple test.

A fifteen-minute test.

What the result means.

In the West Chester water system.

Aqua Pennsylvania supplies the borough system, and its 2025 West Chester report lists a customer line at 877-987-2782 and a service line inventory at aquawater.com/leadmap. If your test points to the street side, call Aqua and report it. If it points to your side, document where it is before digging.

Many West Bradford and nearby township properties are on different systems or private wells, so the boundary and the owner differ. Ask your own supplier where its responsibility ends, and keep the answer in writing.

Finding the leak once you know the side.

If the leak is inside the house, leak detection visits uses pressure isolation, acoustic tools and thermal imaging to narrow it to a few feet. If it is between the meter and the house, the repair is a buried-pipe job covered by service line leak repair.

In either case, pressure tests come before digging. Opening a trench on a guess is how a small leak becomes a landscaping project.

Before anyone digs.

Pennsylvania law requires an 811 call at least three business days before excavation. Utilities mark their lines for free, and a contractor should submit their own ticket. Keep the markings visible, and do not dig inside them without hand tools.

What a service line looks like from the street to the house.

A typical residential service line begins at a tap on the water main, runs to the property line, and continues underground to the house. Along the way there is usually a shutoff valve near the curb that the utility can operate, and a meter that may sit in a pit near the street or in the basement. The line enters the house through the foundation or under the slab.

The pipe can be made of copper, galvanized steel, plastic or, in older systems, lead. Utilities keep inventories of their side of the line and are required by federal rules to identify lead service lines. The inventory Aqua mentions is meant to help customers see what material their service line is made of.

Evidence a plumber can bring to a utility.

When the leak turns out to be inside.

If closing the main stops the meter, the leak is inside the house. Common sources are toilets, water heaters, hose bibs, supply lines to appliances and pipes in walls or under the slab. Start with the cheap checks: dye in the toilet tank, a look at the water heater and a walk around the outside faucets.

If those turn up nothing, detection equipment helps. A plumber isolates sections of the house plumbing with shutoff valves, watches the meter after each one, and listens along the pipe. This usually finds the zone in under an hour, and then the exact spot.

Why waiting costs more than it seems.

A slow leak outside the foundation can undermine soil. A slow leak inside a wall can feed mold. A slow leak under a slab can erode the soil beneath it.

In every case, the water bill is only part of the cost. The longer the leak runs, the more of the house it can reach.

A fifteen-minute test is a small price against that. If it shows movement, act within days rather than weeks.

What to do if water is near the electrical panel.

Do not step into standing water to reach the panel or a shutoff. Close the main water valve if you can do it from a dry spot, and call the electric utility or an electrician about cutting power from outside the wet area. Water and electricity together are the real emergency, and the meter test can wait.

Where to go next.

Once you know the side, leak detection or service line leak repair is the next step, and West Bradford has its own notes on wells and older houses.

Sources and standards.

Sources: Aqua Pennsylvania's 2025 Water Quality Report for the West Chester Division (customer line 877-987-2782) and the Pennsylvania Public Utility Commission's 811 guidance.

Meter and leak questions.