Mysterious Water Leak?Let’s Find the Source.
Answer a few simple questions to narrow down the cause and see what to do next.
Which clue sounds familiar?
Choose one starting point. You can change categories at any time.
Not sure? Use the blue Text Me button and describe what you’re seeing.
Follow the clues
Get help with your leak
- Tap Text Me to open your text-message app.
- Hi there! Please describe the issue and, if possible, attach a photo.
- Replace the prompt with your description, attach a photo if possible, and tap Send.
You can text at any point, even if you haven’t finished the guide. Photos are added in your messaging app.
Helpful checks
Optional observations to help you prepare for an inspection.
Water-meter check & controlled hose test
The 30-minute meter check
Turn off faucets and pause appliances that use water. Note or photograph your water-meter reading. Use no water for 30 minutes, then compare readings.
A changed reading can point to water use or a supply leak. An unchanged reading does not rule out drain leaks, rain entry, intermittent leaks, or a slow leak the meter has not registered. This 30-minute check is preliminary; EPA recommends comparing readings over two hours with no water use.
A controlled hose test
Discuss the test with a professional first. With a helper observing inside, apply gentle water to one small exterior area at a time, starting low and moving upward.
Stop when moisture appears. Never climb onto a roof, use a pressure washer, or spray into vents or electrical equipment. A test can recreate a leak and cause damage.
Keep a leak log — see an example
Note the weather, location, and what was running. This is an example—keep your own notes and photos.
| Day | Conditions | What you noticed |
|---|---|---|
| Tue | Heavy rain + wind | Watermark near an exterior wall |
| Wed | Dry weather | No new moisture |
| Thu | Rain returned | Same area became wet again |
Some leaks need
immediate help.
- Water near wiring, outlets, a light fixture, or an electrical panel.
- A bulging or sagging ceiling, falling material, or major wall movement.
- Sewage, contaminated water, or rapidly rising water.
- A gas smell or damaged utilities: leave the area and contact emergency services or the utility.