First, shut off all water inside your house. Everything. No dishwasher, no toilets running, no sprinklers crying for attention. Go look at your water meter—usually that box near the street.
If that little red triangle or dial is still spinning, you’ve got a leak. It’s like the meter is whispering, “Hey, pal, water is moving somewhere it shouldn’t.” This is the cheapest and most obvious clue you’ll ever get.
Seriously, don’t skip this step. It’s like checking your pockets for keys before you call a locksmith. You’d be amazed how many people skip it.