Subtle Signs of a Hidden Underground Leak

Water is the lifeblood of many homes. It nourishes your gardens, sustains your daily routines, and is integral to countless household tasks. Yet, when this vital resource seeps out of designated pipes and drains, the results can be catastrophic.



Water leaks are unseen and undetected, slowly wreaking havoc on your property. They can undermine the structural integrity of your home, drive up your utility bills, and breed unwanted mold growth.

While some leaks are obvious, others are more subtle. This guide will help you uncover the subtle signs of a hidden underground leak so you can act swiftly.

Increased Water Bills

Have you noticed a sudden, unexplainable surge in water bills? While this could result from careless usage, it could also point to an underground leak. When water escapes from the main pipeline or any subsidiary pipes underground, it still continues to be metered. This means you're paying for water that you're not using, which can substantially increase your water bills.

The severity of the leak and the rate at which water is lost will dictate how much your bill increases. So if you notice a sudden spike in your water usage that doesn't align with your normal household activities, it's a good sign you may have an underground leak.

Narrowing down on this issue requires a systematic approach. First, eliminate the common causes of increased water usage, such as additional occupants in the house, a new appliance, or seasonal changes like watering the garden in hot weather.

If these factors don't account for the rise in your bill, turn off all the water outlets in your house, and check the reading on your water meter. If the meter is still running, you likely have a leak.

To confirm if the leak is underground, shut off the water supply valve inside your home and observe the meter. If it continues to run, the leak is likely between the meter and your home, indicating an underground leak.

Low Water Pressure

Another subtle sign of an underground water leak is a drop in water pressure throughout the house. This happens when a portion of the water intended to reach your fixtures and appliances leaks out along the way, resulting in an insufficient flow rate.

A lower pressure can significantly impact your daily activities and routines, especially if you're taking a shower or washing dishes. So if you notice a consistent decrease in your water pressure and can't connect this to municipal supply issues or internal plumbing faults, an underground leak could be the likely culprit.

Pinpointing this leak through a water pressure drop involves a combination of observation and deduction. First, contact your local water company. They can inform you of whether there are any known issues affecting your area.

If the supply is normal, the next step is to determine if the low pressure is confined to a single faucet or if it's systemic throughout your home. A widespread pressure drop is a stronger indicator of an underground leak.

Just like with the water bill issue, shutting off the water supply valve and observing the meter can help you determine if the leak is underground. But in many cases, you need an expert eye to accurately locate the source of the leak. You might have more than one leak, which can be difficult to locate if you don't have the right equipment.

You should be vigilant when it comes to your water supply. Hidden underground leaks can be costly and can cause damage to your property. While these signs can apply to other plumbing issues, take them as a warning sign for possible underground leaks.

If you suspect an underground leak, call us at Express Plumbing & Septic. Remember, prevention can help protect your property. The earlier you detect a leak, the better it is for your home and wallet.