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How to Find a Water Leak Underground

Unlike leaks in visible pipes or fixtures, underground water leaks often go undetected for a very long time because the pipes...

May 05, 2026
How to Find a Water Leak Underground

Unlike leaks in visible pipes or fixtures, underground water leaks often go undetected for a very long time because the pipes are buried deep below the surface. Luckily, there are simple ways to discover a water leak underground. Here at Mr. Rooter Plumbing, we specialize in leak detection and water leak repair in Little Silver Township. We are equipped with specialized leak detection tools, including acoustic leak detectors, moisture meters, thermal imaging cameras, and video inspection cameras, to accurately detect underground water leaks.

Examine Your Water Bills

One of the initial indicators of an underground water leak is an unexplained increase in your water bills. If you notice a significant spike in your water usage without any change in your consumption pattes, it could signal a hidden leak. Compare your recent water bills to previous ones and be attentive to unusual fluctuations. If there is a consistent upward trend, it's time to call a leak detection expert to perform a thorough inspection.

Our Customers Reviews

Larry R.

Howell Township, NJ

It was a late Saturday night. We had a super stubborn clog in some old galvanized pipes. Mr. Rooter send out Phil. Phil was great! He found the problem pretty quick. With determination and professionalism he final got it cleared out. I would recommend Mr. Rooter and Phil to anyone! He even cleaned up. We are so happy we choose Mr. Rooter!

Rose Bernard

Red Bank, NJ

We had a plumbing emergency and found Mr. Rooter while frantically searching for a 24-hour plumber. We feel like we hit a gold mine. Not only did we get a timely response. Everyone at Mr. Rooter was friendly, professional, competent and went above and beyond. Our plumber, Phil, was extremely helpful and gave us tips we could use moving firwars. Not to mention, the cost was extremely reasonable.

Joseph Chis

Hillsborough, NJ

Had sewer water backup in toilet and tub. Received callback as promised and arrived early. The tech determined we needed the main line to be cleared. He quickly located the opening and had us cleared in minutes. Very happy with the service. I was not prepared for the fee but it was an emergency.

Christopher Cox

Little Silver Township

Plumber, Phil, came out on short notice on a Saturday night and fixed our issue quickly, professionally and courteously. I contacted a different, well known plumbing company right before Mr. Rooter. The receptionist was rude and they didn’t call me back to say they couldn’t make it until after Phil left! The Mr. Rooter receptionist was very nice and they called me back quickly. I’m glad they did.

Debbie Dimitrion

Colts Neck, NJ

I just wanted to say James did a great job at my house. Excellent service, professional and very nice. Thank you so much for helping me with my plumbing problem. Did wonderful job.

Rachel Turunen

Jackson Township

I was very happy that I went with Mr. Rooter’s. The service was very quick and up front. Jessie James was very helpful answering my questions and replacing my hot water heater. He was pleasurable to do business with. If another problem arises in my home, I will be using this company again.

William Holden

Brick Township, NJ

A thorough, professional, pleasant experience. I had a back-up in the 50 year-old pipes of my new home. I called Mr. Rooter to have them locate the blockage, snake the line, and then use their video snake to get a visual of the integrity of the pipes. I’m glad that I called and will use them again for future needs.

LarJ MarJ

Oakhurst, NJ

You get what you pay for. Edwin Robles of Central NJ educated me as a 1st time homebuyer on why and what he was repairing, prevention, PROMPT,(on a sunday at that!) clean, knowledgeable, super professional but DOWN TO EARTH and at a REASONABLE PRICE! Sewer pipes unclogged and main water line fixed. I was no longer crying once job was thoroughly executed. After all $#@* $tinks but somebody has to do it and I HIGHLY recommend him and this company for a job well done. THANK YOU VERY MUCH!!

Margie Rafferty-Criscione

Ocean Township

Absolutely lovely office staff! I always knew when the repair person was coming. Lorenzo our repair guy was awesome, I really don't think there is anything he can't do. He looks young, but don't let that fool you! So happy all the repairs are behind us. We really just did a one-stop shopping and decided to have everything we've put off fixed because it was such a tremendous experience!

How to Find a Water Leak Underground

In this article, we will highlight some of the methods and techniques for finding underground water leaks and the steps to take after you’ve discovered the leak.

Perform a Water Meter Leak Detection Test

To determine if there is a leak in your water supply line, conduct a simple water meter test. Ensure all water-consuming appliances and faucets are tued off, and no one is using water inside or outside your property during the test. Locate your water meter and take note of the readings. Wait for a few hours without using any water, and then recheck the meter. If the meter readings have changed despite no water usage, it's likely that you have an underground water leak.

Keep An Eye On Noticeable Signs

Although underground water leaks are not visible, they often leave noticeable signs on the surface. Unfortunately, the signs are only seen from the surface when they’ve done extensive damage. Look out for damp or soggy spots in your yard, especially when there has been no recent rainfall. Areas with unexplained lush green patches or uneven grass growth might also indicate a water leak beneath the surface. Reduced water pressure, cracked pavement, and the sound of running water when no taps are open are additional signs that may point to an underground water leak.

Hire A Professional Plumbing Service

If you are unable to locate the leak using the above methods, or if you suspect a more complex issue, consider hiring a professional plumbing service to help you. Experienced plumbers have the expertise and specialized equipment, such as leak detection devices and cameras, to pinpoint the exact location of the leak without causing unnecessary damage to your property. They can conduct a thorough inspection of your plumbing system, identify the source of the leak, and recommend the most appropriate repair method.

Contact Mr. Rooter Plumbing For Professional Leak Detection And Water Leak Repair

If you suspect an underground water leak or have noticed any of the signs mentioned above, do not hesitate to call in a trusted plumbing service to perform a comprehensive inspection and carry out the necessary repairs. If you’re looking for a reputable plumbing service to help you with leak detection and water leak repair, look no further than Mr. Rooter Plumbing. With decades of experience in the plumbing industry, we have the expertise to detect all types of plumbing leaks and provide you with long-lasting solutions.

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