Why is my water bill suddenly higher when I'm not using more water?
A water bill that climbs while your habits stay the same usually means water is escaping somewhere you can't see. The most common culprits are a toilet that runs quietly, a leak in a supply line, or irrigation that is using more than you think.
Not every jump is a leak. A longer billing period, an estimated meter reading or a rate change can raise a bill too, so it is worth ruling those out first. A simple meter check will tell you which case you have.
Why it happens
Small leaks waste a lot of water over a month because they never stop. A dripping fixture or a failing water heater relief valve works the same way. You rarely notice any of it, but the meter does.
Leaks in the pipes themselves are harder to spot. Many Florida homes are one-story concrete block on a slab, and the supply lines often run in or under that slab. A pinhole leak there can run for weeks without a wet spot on the floor, because the water drains into the soil. Older supply pipe such as polybutylene or galvanized steel is more prone to developing leaks as it ages. Hard water scale can also wear on fixtures and water heaters.
Outdoor use is another common cause. In Florida's heat and heavy rain, sprinkler timers get changed, zones crack or stick open, and pool auto-fill valves keep topping off. Irrigation water often goes through the same meter, so a stuck zone shows up on the bill the same way an indoor leak does.
What you can check yourself
Turn off every fixture, appliance and sprinkler, then look at your water meter. If the leak indicator or the dials keep moving, water is going somewhere in the system.
Put a few drops of food coloring in each toilet tank and wait without flushing. If color shows up in the bowl, the flapper or fill valve is leaking.
Run each sprinkler zone and look for geysers, soggy patches or heads that won't shut off. Check that a pool auto-fill valve isn't stuck open.
Compare the billing period length, whether the reading was estimated, and any rate or fee changes. Your water utility can explain a charge you don't understand.
Check under sinks, around the water heater and at outdoor hose bibs. A warm area on a tile or concrete floor, or the sound of running water when everything is off, can point to a leak in the slab.
When to call a pro
If the meter keeps moving with everything off and the toilets and outdoor lines check out, the leak is probably inside a wall, under the slab or in a buried line. Finding and repairing that takes leak detection equipment and, often, opening a wall or floor. In Florida, plumbing work must be done by a plumbing contractor licensed through the state's Department of Business and Professional Regulation. If the repair involves re-piping or a water heater replacement, a permit is generally required. The licensed plumbing contractor pulls it, so verify the details with your local building department.
Call USA Home Repairs and we match you with a licensed plumbing contractor near you. The estimate is free, and you approve the price before any work starts.
What a pro will do
- Locate the leak
The pro confirms the leak with a pressure test and leak detection equipment. That narrows down where it is before anything is opened up.
- Repair or replace fixtures
Running toilets, failing faucets and worn valves are usually fixed by replacing the worn parts.
- Repair slab or in-wall leaks
Depending on access and pipe condition, the pro may repair the damaged section or reroute the line around it.
- Re-pipe aging supply lines
If polybutylene or galvanized pipe keeps leaking, replacing it may make more sense than patching. The licensed plumbing contractor handles the permit.
- Check pressure and the water heater
High water pressure strains pipes and fixtures. The pro can test it, along with the water heater and its relief valve.
Related questions
Can a leak under the slab raise my bill without any visible damage?
Yes. Water from a slab leak often drains into the soil, so you may see nothing inside the house. A bill that keeps rising, a moving meter with everything off, or a warm spot on the floor are the usual clues.
Can high water pressure make my bill go up?
It can contribute. Higher pressure pushes more water through any leak or open fixture and puts extra strain on pipes, valves and the water heater. A pro can test pressure and fit a regulator if the numbers are too high.
What affects the cost of finding and fixing a hidden leak?
The main factors are where the leak is, how hard it is to reach, the pipe material, whether a wall or slab must be opened, and whether a permit is needed. A pro can only tell you what is involved once the leak is located, which is why the estimate is free.
Does a plumber need a permit to fix a leak?
Simple repairs often don't. Re-piping and water heater replacement generally do, and the licensed plumbing contractor pulls the permit. Requirements are set locally, so verify with your building department.
Want a pro to look at it?
Leave your number and we call you right back to set a time. Every visit is a free estimate, with no obligation, and we'll match you with a licensed plumbing contractor near you.
Rather talk to someone? Call (888) 996-7488.