1. Your water bill suddenly increases: A running toilet, dripping faucet, damaged supply line, irrigation problem, or concealed pipe leak may increase water use. Compare recent bills and consider a plumbing inspection if nothing else has changed.

2. The water meter keeps moving: Turn off faucets, appliances, irrigation, and other expected water use. A meter that continues registering water use may indicate a leak, although it cannot show where the water is escaping.

3. You hear water when everything is off: Running or dripping sounds behind a wall may indicate a concealed leak. First confirm that toilets, washing machines, dishwashers, ice makers, and irrigation systems are not operating.

4. A wall feels damp or the paint bubbles: Moisture can cause stains, peeling paint, bubbling surfaces, or soft drywall. The source may be plumbing, a roof, window, appliance, or exterior water, so the area should be inspected before the wall is opened.

5. A stain appears on the ceiling: Ceiling moisture may come from a bathroom, kitchen, laundry area, water heater, or pipe above it. Request emergency plumbing service if water is actively spreading or the ceiling begins to sag.

6. The floor feels warm, wet, or damaged: A warm area may be associated with a hot water line beneath the floor. Warped flooring, loose tiles, or damp carpet may indicate moisture from a pipe, fixture, appliance, or exterior source.

7. The property has a persistent musty smell: Moisture trapped inside a cabinet, wall, ceiling, or floor may create a musty odor. The smell does not confirm a plumbing leak, but it can identify an area that needs professional inspection.

8. Water pressure drops throughout the property: Low pressure may result from a hidden leak, corroded pipe, valve problem, pressure regulator issue, or water-service condition. Older plumbing may also need a galvanized pipe inspection.

9. Moisture keeps returning under a sink: Water may come from the faucet, supply lines, shutoff valves, drain connections, or garbage disposal. Dry the cabinet and watch where the water first returns.

10. Water pools near the foundation: Plumbing, irrigation, drainage, rainfall, or another exterior source may be responsible. The timing, location, and water-meter activity can help determine whether professional leak detection is appropriate.

11. A toilet loses water silently: A toilet can leak internally without leaving water on the floor. A worn flapper, fill valve, flush valve, or seal may require toilet repair.

12. The water heater area stays damp: Moisture may come from a valve, drain connection, supply line, nearby pipe, or the water heater itself. Avoid touching wet electrical components and request water heater service.