5 Warning Signs You Have a Hidden Water Leak in Your San Antonio Home

If your monthly SAWS bill suddenly jumps and your usage habits have not changed, a hidden leak is one of the most likely causes. Even a small slab leak or a slow drip inside a wall can waste hundreds of gallons per month. Compare your current bill to the same month last year — if there is a noticeable increase with no obvious reason, it is time to investigate.

Water stains on ceilings, bubbling paint on walls, or unexplained damp patches on floors often point to an active leak behind the surface. In San Antonio homes — especially those in neighborhoods like Alamo Heights, Terrell Hills, and Monte Vista where older plumbing is common — these signs should not be ignored. What looks like a minor stain today can become a major mold and structural issue within weeks.

A persistent musty smell in a specific room or area of your home usually means moisture is accumulating somewhere out of sight. Mold thrives in dark, damp environments, and a hidden pipe leak provides the perfect conditions. This is especially concerning in bathrooms, kitchens, and laundry rooms where plumbing runs through walls and under floors.

A sudden or gradual decrease in water pressure can indicate a leak somewhere in your supply line. If the pressure drop affects your entire house rather than a single fixture, the leak may be in your main water line or under your foundation. San Antonio's expansive clay soils shift with seasonal moisture changes, putting stress on underground pipes and making slab leaks a recurring issue in areas like Stone Oak, Shavano Park, and the far northwest side.

If you can hear the faint sound of water running through pipes when every faucet, toilet, and appliance is turned off, that is a strong indicator of a leak. Try turning off all water-using fixtures and check your water meter — if the dial is still moving, water is escaping somewhere in your system.

Do not wait. Hidden leaks cause cumulative damage every day they go undetected. A licensed plumber with professional leak detection equipment can pinpoint the exact location of the leak without tearing up your home. At CSW Power Solutions, our licensed plumbers use acoustic listening devices, infrared cameras, and moisture meters to locate leaks quickly and accurately.

As a veteran-owned company, we take pride in honest, transparent service. We identify the problem, explain your repair options, and get the job done right the first time — whether that means a targeted pipe repair or a full re-route. We serve homeowners and businesses across San Antonio and surrounding communities including Boerne, Schertz, New Braunfels, Helotes, and Converse. Call us at 210-504-9796.