Why Is My Water Bill Suddenly High?
A sudden jump usually means hidden water use—often a leak. Here’s how to confirm it safely and what to do next.
Most common causes: running toilet, irrigation valve leak, underground service line leak, faucet/fixture leak, or a failed pressure regulator causing excess flow.
Immediate safe check (5 minutes)
- Turn off all water use (no showers, no laundry, no dishwasher, no hose bibs).
- Look at your water meter and find the leak indicator/needle.
- If it moves while everything is off, you have active water flow somewhere.
Is it inside the house or outside underground?
Use your home’s main shutoff valve (usually where the water line enters the house).
- Shut off the main valve into the house.
- Check the meter again.
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If the meter still moves: the leak is likely between the meter and the house (often underground service line).
If the meter stops: the leak is likely inside the house (toilet, fixture, appliance).
Do not ignore a moving meter. Underground leaks can wash out soil and cause damage beyond the utility bill.
About yard puddles
If you see persistent pooling that doesn’t dry out in warm weather, it’s a strong clue—but not a precise leak location. Water migrates through soil and can surface away from the actual pinhole.
When to call a plumber
- Meter shows movement when all water is off
- Leak appears to be underground (meter still moves with house shutoff closed)
- Persistent wet spot/puddle, soft ground, or sinking areas
- You cannot identify a leaking fixture quickly
Related Field Note: High water bill + yard puddle traced to underground service line leak (why the puddle wasn’t the leak)
When the increase points toward an underground or hidden leak, these are the services and related notes in our work:
- Leak detection — pinpoint hidden leaks without unnecessary demo
- Related field note: underground service line leak — real case study