WEST PALM BEACH, FL · UNDERGROUND LEAK DETECTION
Find the leak in your yard before anyone starts digging.
A patch of grass that stays wet no matter how dry the week’s been. A water bill that jumped even though nothing changed inside the house. The meter still spinning with every fixture shut off. That combination almost always points to an underground leak, and a proper leak survey can trace it without digging up the whole yard — whether it’s the supply line between the meter and your house or a buried irrigation line.
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How we trace an underground water leak without tearing up the yard
Underground leaks are diagnosed differently than the ones under your slab, mainly because there’s more open ground to work with and the pipe is usually shallower. Not sure which you have? Read slab leak vs underground leak for a side-by-side comparison.
- Meter isolation test. With everything in the house shut off, a still-spinning meter confirms continuous flow somewhere on the property side of the line — the starting point for every underground call.
- Acoustic listening. A ground-contact microphone picks up the specific sound of pressurized water escaping underground, and we walk the suspected line to narrow the location.
- Ground microphone / correlator. For longer runs or deeper lines, correlating the sound from two points along the pipe pinpoints the leak to within a few feet, without probing blindly.
Once the leak is marked, the actual dig is usually a single, targeted hole a couple of feet across — not a trench along the whole line.
Main line, irrigation line, or something else?
Two different underground lines cause two very different problems, and telling them apart matters for both diagnosis and who’s actually responsible for the fix.
| Main supply line | Irrigation line | |
|---|---|---|
| Typical sign | High bill, low household pressure | One unusually green or soggy patch of lawn |
| Where it runs | Meter to the house | Sprinkler zones throughout the yard |
| Usual cause here | Aging copper or galvanized pipe, ground shift | Cracked PVC from root intrusion or settling |
| Who it’s usually on | Homeowner, past the meter | Homeowner |
If the leak turns out to be before your meter, on the utility’s side, we’ll tell you plainly — that’s a call to the utility, not a repair we’d charge you for.
Why West Palm Beach Yards Need Underground Leak Detection More Often
- Sandy, shifting soil. Ground sitting over the Biscayne Aquifer moves with every heavy rain, putting steady stress on buried pipe joints.
- Pipe lifespan cut short. Cast iron typically runs 25–50 years elsewhere; in South Florida’s soil and climate that’s often closer to half. Older polybutylene, used in some homes through the 1990s, can fail in as little as 10–15 years.
- Root intrusion. Mature landscaping in neighborhoods like Old Northwood and El Cid means tree roots are a real factor for shallow irrigation and supply lines.
- A long wet season. June through November, saturated ground adds pressure to lines already under strain.
What underground leak detection costs
A shallow, single-source irrigation leak is usually the fastest and least expensive of the underground calls we get — often resolved within an hour or two of testing. A main line leak on a larger property, or one with multiple suspected sources, takes more time to correlate and is priced accordingly. Either way, our underground water leak detection services come with an exact price before anyone picks up a shovel. Our leak detection cost guide covers what drives the price.
UNDERGROUND LEAK BASICS
What Counts as an Underground Water Leak?
An underground water leak is any leak in a buried pressurized line on your property — most commonly the main supply line running from the meter to the house, or an irrigation line feeding sprinkler zones around the yard. Because these pipes sit below grade, the leak itself is invisible; what you actually notice is the water’s effect on the surface above it, which is exactly what a trained technician reads to find the source.
Common Signs of an Underground Leak
The EPA WaterSense program notes that a single undetected household leak can waste thousands of gallons a year, which is exactly why catching the signs early matters. Beyond the soggy patch, bill spike, and spinning meter already mentioned above, other signs worth watching for include:
- Standing or pooling water in a spot with no obvious drainage explanation
- One area of grass or landscaping that’s noticeably greener or grows faster than the surrounding lawn
- Unusually soft or spongy ground when you walk across a specific area
- Lower water pressure at fixtures throughout the house
- A hissing or running-water sound audible near the ground in one area
- Cracking or settling in a nearby walkway, driveway, or foundation edge, in more advanced cases
If the affected area is under the house itself rather than out in the yard, that’s more likely a slab leak — our comparison FAQ below covers how to tell the difference.
HOW IT’S FOUND
More on How Professional Underground Leak Detection Works
The meter isolation test, acoustic listening, and ground correlator described above are the core of most underground calls. A couple of related steps round out the process:
Pressure Testing
On properties with more than one buried line, isolating and pressure testing each section helps confirm which specific line is losing water before acoustic equipment is used to pinpoint the exact spot.
Line Tracing and Pipe Location
Before testing even starts, a pipe locator is often used to trace the actual path of the buried line, since it doesn’t always run exactly where old plans or assumptions suggest. Knowing the real path narrows where acoustic testing and any eventual digging need to focus.
What Happens During an Underground Leak Inspection
Here is what a typical underground leak detection visit in West Palm Beach looks like, step by step:
- You describe what you’ve noticed — a wet patch, a bill spike, or a pressure drop — and where.
- A meter isolation test confirms whether water is moving through the line when it shouldn’t be.
- The line is traced and, if there’s more than one buried line, pressure tested to identify which one is affected.
- Acoustic listening and, for longer or deeper runs, correlation narrow the leak to a specific spot.
- The location is marked and shown to you, along with a real price, before any digging happens.
RESIDENTIAL VS. COMMERCIAL
Residential vs. Commercial Underground Leaks
Residential underground leak detection in West Palm Beach is usually limited to one main supply line and a handful of irrigation zones, which keeps the testing area fairly contained. A commercial or multi-building property typically has longer distribution runs, more zones or connections to check, and sometimes shared lines serving several units — which is why underground detection on a commercial site, covered on our commercial leak detection page, often takes more time to fully trace and isolate.
What Can Affect Underground Leak Detection Cost
Beyond the irrigation-versus-main-line distinction already covered above, cost within that range depends on how long the suspected line run is, how deep it’s buried, whether more than one line needs to be isolated and tested, and how easy the area is to access. As with our other services, you’ll get a specific number once testing confirms what’s actually going on, not a flat rate quoted sight unseen — the price follows the diagnosis, not the other way around.
COMMON QUESTIONS
Frequently asked questions
How is this different from a slab leak?
A slab leak is under your home’s foundation; an underground leak is out in the yard, in the supply or irrigation line. If you’re not sure which one you’re dealing with, our water leak detection overview walks through how to tell, or just call and describe what you’re seeing.
Will you need to dig up my whole yard?
No. Acoustic tracing and correlation narrow the leak to a specific, small area before any digging starts. The typical result is one targeted hole, not a trench.
How do you detect an underground water leak?
Start at the meter. Turn off everything inside, note the reading, and check again after 30 to 60 minutes. If it has moved, water is escaping somewhere on your side of the line. From there, a technician uses a ground microphone and, on longer runs, a correlator to pinpoint the spot. Our guide to finding an underground water leak covers the homeowner checks in more detail.
Can a plumber find an underground leak?
Sometimes, but it takes acoustic and correlation equipment that a general plumbing visit does not always include. Locating the leak first means whoever repairs it, whether that is us or your own plumber, opens one spot instead of searching by digging.
What is a leak survey?
A leak survey is a systematic check of where a property is losing water. It combines a meter isolation test, pressure testing of individual line sections, and acoustic listening along the buried pipe. On a single home that usually means the supply line and irrigation zones; larger or multi-building properties have more lines to cover and take longer. A leak survey is how larger or unclear cases are covered.
What if the leak is on the utility company’s side of the meter?
We test for that specifically. If it’s before the meter, it’s the utility’s responsibility to repair, and some municipalities will even credit the water lost to a confirmed leak on your bill.
How fast does grass recover after a repair?
Since we’re typically opening one small area rather than trenching the yard, most lawns recover within a few weeks with normal watering — nothing close to full re-sodding.
Can tree roots really cause an underground leak?
Yes. Roots seeking moisture can put pressure on or grow into aging PVC or older pipe joints, especially on shallower irrigation lines, eventually cracking them. This is common in neighborhoods with mature, established landscaping.
Could a soggy area actually be a sewer line issue instead of a water leak?
It’s possible, and the two can look similar at the surface. Part of a thorough inspection is ruling out whether a drain or sewer line is contributing before focusing entirely on the pressurized supply or irrigation side.
Is an underground leak an emergency?
Not usually in the way a burst pipe indoors is, but a main line leak that’s affecting your household water pressure or driving up your bill significantly is still worth prompt attention rather than letting it run indefinitely. If you are not sure how urgent yours is, our emergency leak detection service can help you decide.
Do commercial properties need a different approach to underground detection?
The core methods are the same, but a commercial or multi-building property often has more lines and longer runs to trace, so an inspection can take more time to fully isolate the source. See our commercial leak detection page for more on what’s different about that setting.
Is underground leak detection pricing different in West Palm Beach?
The methods and pricing factors are the same everywhere, but West Palm Beach’s sandy soil and shallow water table can make some leaks easier to trace acoustically, which is why local underground jobs are often quicker than in areas with denser clay soil.
Noticed a soggy patch or a bill that doesn’t add up?
Call +1 (728) 224-6444 and we’ll walk you through what’s likely happening before we ever schedule a visit.