Underground irrigation leaks can be some of the most expensive and damaging issues homeowners face, largely because they’re easy to miss. Unlike broken sprinkler heads or visible geysers, leaks below the surface can quietly waste water, damage your landscape, and drive up utility bills before you realize something is wrong. Knowing the early warning signs can help you catch problems sooner and avoid costly repairs down the line.
Below are some of the most common indicators that your irrigation system may be leaking underground.
#1: Unusually wet or soggy spots in your yard
If parts of your lawn feel soft, spongy, or muddy even when your irrigation schedule hasn’t changed, it may point to a leaking underground line [1]. Persistent moisture without rainfall is often one of the earliest signs of a hidden irrigation issue.
#2: Grass that’s suddenly greener or growing faster in one area
While healthy grass is usually a good thing, patches that look noticeably greener or grow faster than the rest of your lawn can indicate excess water from a leak. Underground breaks often feed one section of turf continuously, creating uneven growth patterns [1].
#3: Dry patches caused by pressure loss
Leaks don’t always lead to overwatering. In many cases, a break in the line reduces pressure throughout the system, preventing sprinkler heads from delivering enough water [2]. This can leave some areas dry or stressed while others appear overwatered.
#4: Low water pressure or weak sprinkler performance
If sprinkler heads no longer pop up fully, spray unevenly, or mist instead of producing a strong stream, an underground leak could be diverting water before it reaches the heads [3]. Pressure changes are a key mechanical warning sign.
#5: Standing water or bubbling soil
Pooling water, bubbling soil, or water surfacing during irrigation cycles are strong indicators of a broken underground pipe [1]. These signs should never be ignored, as leaks can quickly worsen and lead to erosion or structural issues.
#6: A sudden spike in your water bill
One of the most common ways homeowners discover irrigation leaks is through unexpected increases in water usage [2]. Even small underground leaks can waste thousands of gallons each month, making your water bill a valuable diagnostic tool.
#7: A water meter that moves when everything is off
A simple test can reveal hidden leaks. If your water meter continues to move when all water sources, including irrigation, are turned off, it may indicate a leak somewhere in the system [3].
When to call a professional
Underground irrigation leaks rarely resolve on their own. Left unchecked, they can damage landscaping, wash out soil, and significantly increase water costs. Professional inspections allow trained technicians to locate leaks efficiently and repair them before they escalate.
If you’ve noticed any of these warning signs, James River Irrigation can help. Our team specializes in irrigation inspections, leak detection, and system repairs designed to protect your landscape and conserve water. Contact James River Irrigation today to schedule a professional system evaluation and keep your irrigation system running efficiently.
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