High water bill investigation

A bill is a symptom with no location attached. Before hunting for a leak, spend ten minutes establishing two things: whether water is genuinely moving, and whether the bill measures what you think it does.

Start at the meter, not at the bill

Turn off every tap, appliance and ice maker. Shut the irrigation at its isolation valve and the pool auto-fill at its valve. Then look at the meter face: most have a small low-flow indicator — a triangle, a dial or a star — that turns on very small flows. If it is moving with everything shut, water is leaving somewhere. Note the reading, leave it an hour and read again; a figure you can compare beats an impression.

That test also splits the property. If the indicator stops when the irrigation valve closes, the loss is in the irrigation. If it stops when the house valve closes, it is inside. If it keeps going with both closed, it is the service line.

Read the bill properly before you panic

Billing periods are not all the same length, and a few extra days look like a jump that is not one. Then there is the part that catches people out: several Valley cities work out your sewer charge from how much water you used in winter and apply that figure to every bill for the following twelve months. Goodyear uses January, February and March. Peoria runs December through March. So an auto-fill stuck open in February does not just show up that month — it can quietly lift the sewer line on every bill until the following spring, and Goodyear’s own guidance tells residents not to fill a pool during those months for exactly this reason.

There is a page for the detail by provider: bills by water provider.

Outdoors is where it hides

According to City of Phoenix Water Services, most of the water a Valley home uses goes outdoors. That makes an outdoor leak both the easiest one to miss and the one it hurts most to leave alone: irrigation, drip, a pool auto-fill and the buried service line can all lose water for months without a single damp wall to warn you. And in this ground — clay, caliche and hardpan at shallow depth — the water runs sideways rather than surfacing, so the yard can look perfect.

How we work a property when the bill is the only symptom

Staged isolation, in order of how much water the thing can waste. The pool and its auto-fill first, because a stuck fill valve is a common one. Then irrigation, mainline before zones. Then the house, hot and cold separately. Then the service line on its own gauge. Each stage either clears a section or hands us the next, and by the end the meter and the story agree. Whatever it turns out to be gets located properly and, where it is ours to do, put right — see leak repair.

The limit worth stating: a static test only catches a leak that is running while you watch. A valve that passes water only when a zone is called, or a fill valve that sticks intermittently, will sit perfectly still during a meter test. That is why we run systems rather than only watch them, and why an intermittent problem sometimes takes a second look to catch in the act.

About adjustments

Please do not count on one, and we will never promise one. Leak adjustments are rarer than people assume. Of the Valley providers we checked, Cave Creek was the one publishing a policy we could verify; Phoenix, Glendale, Chandler, Tolleson and EPCOR were each checked and do not publish one. Ask your own provider directly. Either way the water stops going to waste the day the leak is fixed.

When the bill is right and there is no leak

A pool filled or refilled, new landscaping being established, houseguests, a longer billing period, a rate change, a summer of genuine evaporation, or last winter’s average still sitting on this year’s sewer line. Any of those can explain a jump, and if that is what yours is, that is what we will tell you. If it is the pool you are wondering about, the bucket test answers that at home in ten minutes.