Unexplained increase in your water bill
Wet or soggy spots in your yard
Areas of grass that are greener or growing faster than the rest
Soft, muddy, or sunken ground
Standing water with no clear source
Cracks in pavement, driveway, or foundation
Low water pressure inside the home
Hissing, bubbling, or running water sounds when no water is being used
Water meter moving when all fixtures are off
Musty smell or signs of mold near floors or walls
Warm spots on the floor if the leak is from a hot water line
Persistent puddles near outdoor plumbing or irrigation lines
Foundation shifting or basement moisture
Air in the water lines or sputtering faucets
Visible corrosion or damage near exposed pipe entry points