Pinpointing an underground water leak can be achieved using various methods, including: Listening devices: Specialized equipment like ground microphones or acoustic listening discs can be used to detect the sound of leaking water underground. Pressure testing: By isolating sections of the water line and pressurizing them, the specific section of the line where the leak is occurring can be identified. Infrared technology: Infrared cameras can detect temperature variations caused by leaking water underground, aiding in pinpointing the precise location of a leak. Ground Penetrating Radar (GPR): GPR uses radar pulses to image the subsurface, helping to locate underground pipes and potential areas of water leakage.