Before assuming a hidden leak, or ruling one out, a five-minute water meter check settles the question more reliably than guessing based on a water bill alone. Here is exactly how to do it.
Finding And Reading Your Meter.
Most Prescott-area water meters sit in a small in-ground box near the property line, often covered by a metal or plastic lid marked with a water symbol. Opening the lid reveals a dial display, and most modern meters include a small leak indicator, often a red or blue triangle, star, or spinning dial that moves whenever any water is flowing through the meter, no matter how small the flow.
The Actual Test.
Turn off every water-using fixture and appliance in the house, including anything on an automatic cycle like an ice maker or irrigation timer, and make sure no one runs water during the test. Then check the leak indicator. If it is moving at all with everything off, water is flowing somewhere in the system that should not be. If it is completely still, there is no active leak large enough for the meter to detect at that moment, though a very slow, intermittent leak can sometimes be missed by a single short test.
A More Thorough Version Of The Test.
For a more conclusive result, note the exact meter reading, avoid using any water for two to three hours, then check the reading again. Any change in the numbers, even a small one, confirms water moved through the meter during that window with nothing intentionally running. This version catches slower leaks that a quick visual check of the leak indicator might miss.
What A Positive Result Does Not Tell You.
Confirming a leak exists is only the first step. The meter cannot tell you where the leak is, only that one exists somewhere between the meter and every fixture in the house, including outdoor irrigation and hose bibs if they are on the same meter. A running toilet is the most common culprit and worth ruling out first, since it is inexpensive to check and easy to miss, followed by an outdoor irrigation valve that has failed to fully close.
When To Call For Professional Leak Detection.
If you have ruled out toilets and irrigation and the meter still shows movement, the leak is most likely inside the plumbing system itself. It could be under a slab or inside a wall, and that is where electronic leak detection equipment becomes necessary rather than continuing to guess. Acting on a positive meter test promptly limits both water waste and any structural damage a hidden leak might eventually cause.
How Much Water A Small Leak Actually Wastes.
A leak too small to see or hear can still waste a genuinely significant amount of water over weeks or months, since even a slow, continuous flow adds up around the clock. This is part of why a water bill spike is often the first sign homeowners actually notice, well before any visible water damage appears, and why the meter test is worth running periodically even without an obvious symptom prompting it.
Checking For Leaks Before They Become Expensive.
Running this test once or twice a year as routine maintenance, rather than only after a suspiciously high bill arrives, catches problems earlier and keeps the eventual repair smaller. This is a genuinely useful five-minute habit for any homeowner, and it costs nothing beyond the time it takes to walk out to the meter box and check.
Comparing Your Bill Month To Month.
Beyond the meter test itself, keeping a rough sense of your typical monthly water usage makes a genuine leak much easier to spot early. A bill that jumps noticeably above your normal range, without a clear explanation like extra guests or new landscaping, is worth investigating with the meter test even if nothing seems obviously wrong around the house. Utility companies can often provide a usage history showing month-by-month trends, which makes an unusual spike easy to spot at a glance.
Toilets Specifically Deserve A Second Look.
A running or silently leaking toilet is often invisible to a homeowner because the leak runs down the drain rather than onto the floor, leaving no visible evidence at all. A simple test using a few drops of food coloring in the tank, checked after fifteen minutes without flushing, reveals whether color has seeped into the bowl, confirming a leak between the tank and bowl that a visual inspection alone would likely miss entirely.
Outdoor Irrigation Leaks Are Easy To Miss.
An irrigation system on the same water meter as the house can develop a leak at a buried fitting or a cracked valve that never surfaces as visible standing water, especially in well-draining soil. If your property has an irrigation system, running the meter test with the irrigation controller's automatic cycles fully disabled, not just paused, rules out a common and easily overlooked source of the flow a meter test might otherwise pick up.
What A Genuinely Fast-Moving Leak Indicator Means.
A leak indicator spinning rapidly, rather than moving slowly, suggests a larger active leak, such as a supply line break rather than a small pinhole leak or a running toilet. This is worth treating with more urgency. A larger leak can cause meaningful water damage in a much shorter time than a slow drip would. It is reasonable to shut off the main water valve immediately if a fast-moving indicator accompanies any visible sign of water somewhere in or around the house.
Meter test came back positive?
Same-day service across Prescott and the Quad City area.
If your meter test comes back positive and toilets and irrigation are ruled out, our leak detection service pinpoints the actual location. Our slab leak team handles it specifically if the leak turns out to be under a concrete foundation, a pattern we see often in Prescott Lakes' newer construction.