5 Signs You Have a Water Line Leak (And What to Do Next)

The line from your water meter to your house is pressurized, buried, and invisible — so a small crack can leak for months before anyone notices. A pinhole leak wastes 5–10 gallons an hour, or 3,500–7,000 gallons a month, and by the time it’s obvious you may be looking at eroded soil, foundation stress, and a much bigger repair. The five warning signs below, plus a 15-minute meter test, catch it early.

We’ve done water line repair across Canton, Cherokee County, and North Georgia for 25+ years as a licensed Georgia Master Plumber operation. The area’s aging galvanized and polybutylene lines, shifting red clay, and occasional hard freezes keep supply lines failing on a schedule — here’s what to watch for.

The 5 Signs at a Glance

Sign 1: Your Water Bill Suddenly Jumped

Usually the first clue — a bill 30%, 50%, or 200% higher with nothing changed in the household. Pull your last 12 months of bills and compare year-over-year, not month-over-month: Cherokee County bills rise naturally in summer from irrigation and pool filling, and you want to rule that out before blaming the line. If the bill is up but the yard looks dry, a silent toilet is also a suspect — worth ruling out with a food-coloring tank test first.

Sign 2: A Wet Spot, Lush Patch, or Sinkhole in the Yard

Leaking water surfaces eventually, though not always directly over the leak — it travels the pipe trench through the clay before it breaks out. Look for a lawn patch that stays wet days after rain, a strip of grass greener and thicker than the rest (the leak is fertilizing it), spongy ground between the meter and the house, a new depression or settling, or water bubbling at the curb near the meter.

Sign 3: Low Pressure Throughout the House

A leaking supply line bleeds pressure before water reaches you. Quick triage: one weak fixture is a clogged aerator or a valve at that fixture; pressure that’s fine in the morning but weak at dinner is usually the city side; a whole-house drop that arrived with any other sign on this list is the supply line or pressure regulator.

Sign 4: Running Water Sounds When Everything Is Off

Stand somewhere quiet late at night — no appliances, no toilet refilling, no ice maker. A faint, constant hiss or trickle from the walls, floor, or near the main shutoff is pressurized water moving when it shouldn’t be. People write this sound off as the fridge or HVAC for weeks; if it’s constant and nothing is drawing water, investigate.

Sign 5: Discolored Water or Sediment

A cracked line can pull in dirt and silt, especially as soil shifts around the failure point. Brown-tinted cold water at first draw, grit in a glass, or persistent cloudiness are the tells. Two innocent explanations to rule out: the utility flushing mains (affects neighbors too, clears in hours) and a failing water heater anode — if only the hot side is rusty, look at the water heater, not the supply line.

Confirm It: The 15-Minute Meter Test

1. Turn off every fixture and water-using appliance — toilets, ice maker, washer, dishwasher, irrigation.
2. Find your meter in the covered box at the curb or property line.
3. Watch the small triangular or star-shaped leak indicator dial for 60 seconds. Movement with everything off means a real leak.
4. Close the home’s main shutoff valve and wait 5 minutes. If the dial stops, the leak is in the buried line between meter and house. If it keeps moving, the issue is the meter or utility side — call the water company.

Once confirmed, don’t dig based on where you think the leak is — gas and electric often run alongside water in these yards, and blind digging makes small problems bigger. Acoustic leak detection pinpoints the failure within a few feet so the repair is one hole, not a trench.

Why Waiting Costs More

A leak that adds $30 a month to the bill runs $360 a year — and leaks grow. Constant moisture near the house undermines the slab; wet pressurized pipe attracts tree roots that widen the crack; underground voids collapse into sinkholes under driveways and walkways. Spot repairs in our service area run $800–$2,500, while a line that’s leaked for a year often needs full replacement at $3,500–$8,000 plus landscaping. Catching it early is the whole game — and for the bigger repairs, financing through Wisetack is available.

FAQ

How long can a water line leak before it becomes serious?

A pinhole mid-yard might go months before visible damage; a leak near the foundation, driveway, or a large tree can cause structural trouble in weeks. Once the meter test confirms it, get it diagnosed within a week or two.

Does homeowner’s insurance cover water line repair?

Sometimes. Most policies cover sudden accidental damage but exclude gradual leaks and often exclude the buried service line entirely unless you carry a service line endorsement. Call your agent before repairs start.

Do you have to dig up the whole yard?

No. Acoustic detection localizes the leak so a spot repair needs one hole. Full replacements can often use trenchless methods — two small access pits instead of a yard-length trench.

Should I shut off the main valve if I suspect a leak?

Only for a bad one — visible surface water, sudden total pressure loss, or a leak near the foundation. A small confirmed leak can usually wait, water on, until the appointment. When in doubt, call and we’ll tell you.

Active leak with water surfacing or pressure gone? That’s an emergency call — (678) 758-3493, 24/7, with a 60-minute response target across Canton and Cherokee County from Precision Plumbing & Septic.