Common Signs of Underground Leaks

Homeowners need to be aware of the common signs of underground leaks to avoid more severe problems and know when to contact a residential plumber for help.

Underground leaks can be particularly troublesome because they are often hidden from view and are challenging to detect until they have already caused damage. Whether the issue stems from a broken water main, a leaking sewer line, or a damaged irrigation pipe, underground leaks can lead to water waste, property damage, and high utility bills if not addressed promptly. Homeowners need to be aware of the common signs of underground leaks to avoid more severe problems and know when to contact a residential plumber for help.

Unexplained Increase in Water Bills

One of the earliest signs of an underground leak is an unexpected spike in water bills. Even a tiny leak can waste hundreds of gallons of water over time, resulting in unusually high bills. If the water usage remains consistent but the bill increases significantly, it may indicate a hidden leak. A residential plumber can help locate and repair the leak, preventing further water waste and additional costs.

Damp or Soggy Patches in the Yard

Another clear indication of an underground leak is the presence of damp or soggy patches in the yard. Even in dry weather, certain areas of the lawn may appear wet or muddy due to water seeping to the surface from a leaking pipe. In some cases, these wet spots may also cause the grass to grow more quickly or appear greener than surrounding areas due to the excess moisture. A residential plumber can assess the situation and determine whether a leaking underground pipe is the cause.

Low Water Pressure

A sudden drop in water pressure throughout the home may be another sign of an underground leak. When water leaks from a buried pipe, less water reaches the plumbing fixtures inside the home, resulting in lower pressure. If multiple fixtures, such as sinks, showers, and toilets, experience reduced pressure simultaneously, it may indicate a more serious leak in the main water line. A residential plumber can inspect the plumbing system and identify the source of the pressure loss.

Cracks in the Foundation or Driveway

Underground water leaks can cause the ground to shift, leading to cracks in the foundation, driveway, or other concrete surfaces around the property. The excess water from the leak can erode the soil beneath these structures, weakening their stability and causing them to crack or settle unevenly. Noticing new cracks or changes in the structure of the foundation or driveway may indicate a leak below the surface. Prompt repair by a residential plumber can help prevent further damage to the property.

Unpleasant Odors

Leaking sewer lines can cause foul odors around the property or inside the home. They often release unpleasant gases and wastewater into the surrounding soil. If there is a persistent bad smell, especially near the foundation or in the yard, a damaged sewer line may be to blame. A residential plumber can locate the source of the leak and repair the sewer line, restoring the system to proper working order.

Unusual Sounds of Running Water

Homeowners who hear the sound of running water when no faucets or appliances are in may have an underground leak. Water leaking from a buried pipe may create a faint hissing or whooshing noise as it escapes the pipe and travels through the ground. If unusual water sounds are detected in the home, particularly near the walls or floors, contacting a residential plumber for an inspection is recommended.

Puddles or Water Accumulation in Unusual Areas

Water accumulation in unusual areas, such as around the home's exterior walls, near the water meter, or in other unexpected places, can be another sign of an underground leak. Puddles may form even when there has been no recent rainfall, indicating water is coming from a leaking pipe. Addressing this issue quickly can prevent more extensive water damage and help protect the property from flooding.

Increased Humidity or Mold Growth Indoors

Underground leaks can cause moisture to seep into the home, raising the humidity levels and contributing to mold growth in basements, crawl spaces, or other areas. Mold flourishes in damp environments, and its presence or mildew, especially in typically dry places, may signal a leak. A residential plumber can assess the home for leaks and recommend the necessary repairs to prevent further moisture-related issues.

Sudden Drop in Water Quality

Underground leaks, particularly those involving sewer lines or contaminated water, can lead to a noticeable decline in water quality. Discolored or foul-smelling water coming from faucets or other fixtures may indicate a cross-contamination issue caused by a leaking pipe. A residential plumber can investigate the source of the contamination and take steps to resolve the problem, helping to restore the home's water quality.

Underground leaks can cause a range of problems, from water waste and high utility bills to significant property damage. Being aware of common signs such as unexplained spikes in water bills, damp patches in the yard, low water pressure, and unusual odors or sounds can help homeowners identify leaks early. Prompt action by a residential plumber can mitigate damage, reduce water waste, and restore the plumbing system to full functionality. By addressing underground leaks in a timely manner, homeowners can protect their property and avoid more costly repairs down the line.


Flow Tech Plumbing offers residential and commercial plumbing installation, maintenance, and repair services in the Phoenix area. We repair and replace pipes, faucets, toilets, garbage disposals, and more. We install and repair bathtubs, showers, gas lines, pumps, kitchen plumbing, bathroom plumbing, water heaters, water filters, water softeners, sewers, drains, leaks, and more. We offer hydrojetting and 24/7 emergency service. Call us at (623) 267-2703.

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