A sudden increase in your water bill can come from higher water use, but it may also point to a hidden leak. Common causes include a silent toilet leak, a dripping faucet, or an underground water line leak. Start by checking your water meter when no water is running.
A water bill that jumps for no clear reason is stressful. You start wondering if something is wrong with your pipes, and you’re not sure where to even start looking.
The good news is that a high bill does not always mean you have a leak. Higher household water use, extra outdoor watering, a longer billing period, or a rate change from El Paso Water can all push a bill up without anything being broken.
But hidden leaks are common, and they can run for weeks before anyone notices. This guide walks you through how to rule out normal causes first, then how to check your home for a leak, and when it’s time to call a licensed plumber.
First, Make Sure Your Water Use Really Increased
Before you assume a leak is behind your bill, take a few minutes to compare it with your past bills.
Look at your water usage in gallons or CCF (hundred cubic feet), not just the dollar amount. Rates change from time to time, so a higher bill doesn’t always mean you used more water.
Check how many days were in this billing period. A billing cycle that ran a few days longer than usual will naturally show higher use.
Think about anything that changed around your home. House guests, a new lawn or landscaping, filling a pool, a construction project, or simply a hotter month with more outdoor watering can all raise your usage.
It’s also worth checking El Paso Water’s site for any rate updates or utility notices that might explain part of the increase. Once you’ve ruled out these normal explanations, a leak becomes a more likely cause.
Hidden Plumbing Leaks That Can Raise Your Water Bill
If your usage really has gone up and nothing about your routine has changed, a hidden leak is worth investigating. Here are the most common sources.
A Silent Toilet Leak
Toilets are one of the most common causes of a high water bill, and they can leak without making a sound. A worn flapper or a fill valve that isn’t seating properly can let water trickle from the tank into the bowl around the clock.
Because this kind of leak doesn’t overflow or puddle anywhere, it’s easy to miss for weeks.
Dripping Faucets and Shower Valves
A faucet that drips once every second or two doesn’t look like much, but it adds up fast over a full billing cycle. A worn washer, cartridge, or valve seat is usually the cause.
Shower valves can leak the same way, often behind the wall where you can’t see it directly.
Irrigation and Sprinkler Leaks
If you have a sprinkler system, a cracked line, a broken sprinkler head, or a valve that’s stuck open can send water into the ground long after the watering cycle should have ended. This kind of leak often happens overnight or while you’re away, so nobody notices it happening.
Evaporative Cooler Water Problems
Some El Paso homes use evaporative coolers, and these units rely on a float valve and a water supply line to keep the pad wet. If the float valve sticks or the drain isn’t set up correctly, the cooler can use more water than it should.
This isn’t the case for every home, but it’s worth checking if your house has one.
Water Heater and Appliance Supply-Line Leaks
Water heaters, washing machines, dishwashers, refrigerators with ice makers, and water softeners all have supply lines that can develop small leaks over time. Depending on where the leak is, the water may drain away through a floor drain or collect in a spot you rarely check, like behind an appliance or under a utility sink.
Pool or Fountain Auto-Fill Problems
If you have a pool or a fountain with an automatic fill valve, a faulty valve can keep adding water even when the level is already where it should be. Since the system is designed to top off water automatically, this kind of leak can go unnoticed for a long time.
Underground Water-Service Line Leaks
The pipe that runs between your water meter and your house is called the water service line. A leak in this line doesn’t always reach the surface, especially if the soil around it can absorb the water for a while.
You might notice a soft or unusually green patch of ground above the line before you ever see standing water.
Leaks Behind Walls or Below the Foundation
A slab leak is a leak in a water pipe that runs below or inside a home’s concrete foundation. Concealed leaks can also occur inside walls.
Warning signs include a warm spot on the floor, a damp patch on a wall, or a sound of running water when nothing is turned on. None of these signs confirm a leak on their own, but together they’re worth a closer look.
How to Check Your Home for a Hidden Water Leak
You can check for an obvious leak yourself before calling anyone. Here’s a simple process to follow.
- Turn off all faucets, fixtures, irrigation systems, and water-using appliances.
- Make sure no toilets are running and no automatic systems, like a pool fill or cooler, are active.
- Record your water meter reading, or check its flow indicator if it has one.
- Wait at least 30 minutes to an hour without using any water.
- Check the meter again to see if the reading changed or the flow indicator moved.
- Test your toilets by adding a few drops of food coloring to the tank. Wait 10 minutes without flushing, then check the bowl. If color shows up in the bowl, the toilet is leaking.
- Walk around your property and look for damp soil, standing water, or patches of grass that are greener than the rest of your yard.
- Listen for hissing or running water in a quiet part of the house, especially near walls with plumbing behind them.
A safety note: do not force open a meter box or enter a confined or unsafe area. Stay away from any standing water near electrical outlets or equipment. If you have an active pipe burst or serious flooding, call a professional right away instead of trying to handle it yourself.
Meter designs vary by property, so it’s a good idea to follow the current instructions from El Paso Water for reading your specific meter type.
Signs You May Need Professional Leak Detection
Some signs point toward a leak that’s harder to find on your own. These include:
- Your meter shows water use even when every fixture and appliance is off
- Your bill stays high for more than one billing cycle
- Water pressure drops without an obvious reason
- Floors, walls, or cabinets feel damp to the touch
- Paint is bubbling or drywall shows a new stain
- You hear water moving inside a wall
- One area of the floor feels warmer than the rest
- The ground near your water service line stays wet even without rain or watering
Any one of these signs can have more than one explanation, so a proper inspection is the only way to know for sure what’s causing it. If a home inspection doesn’t turn up an obvious source, it’s time to call a plumber who offers professional leak detection.
How a Plumber Finds a Hidden Leak
A licensed plumber approaches a hidden leak systematically instead of guessing. The process typically includes:
- Reviewing your recent water use patterns and billing history
- Checking toilets, fixtures, appliances, and shutoff valves throughout the property
- Isolating sections of the plumbing system to narrow down where the water loss is happening
- Pressure testing the system to check for a drop that points to a leak
- Inspecting exposed pipes and the water heater for visible signs of moisture or corrosion
- Using specialized leak-detection equipment when the situation calls for it
- Explaining what was found before any repair work begins
No single method finds every leak. A slab leak repair or a water-line repair usually starts with this kind of methodical process rather than one quick test.
How Much Does Hidden-Leak Repair Cost?
There’s no single price that applies to every hidden leak repair. The cost depends on several factors:
- Where the leak is located
- What type of pipe material is involved
- How easy the pipe is to reach
- Whether walls, flooring, concrete, or landscaping need to be opened to reach it
- What type of repair the situation calls for
- Whether there’s water damage beyond the plumbing itself that also needs attention
Because of these variables, it’s best to request a written diagnosis and estimate before any repair work begins. A plumber should be able to explain what they found and what the repair involves before you approve anything.
Can El Paso Water Help With a High Bill Caused by a Leak?
El Paso Water offers a water leak adjustment program for customers dealing with a qualifying hidden leak, such as one behind a wall, underground, or under a foundation. Adjustments are generally based on your average usage history and apply only to a limited number of billing periods, with restrictions on how often you can use the program.
El Paso Water also automatically enrolls eligible customers in a separate leak protection program for an additional monthly fee, which customers can opt out of if they choose.
Because program details, fees, and eligibility rules can change, verify current requirements directly on the official El Paso Water website before assuming your situation qualifies. Keep in mind that a bill adjustment, if approved, only affects the water portion of your bill and does not cover the cost of the plumbing repair itself. The leak still needs to be fixed.
How to Prevent Another Surprise Water Bill
A few regular habits can catch a leak long before it shows up as a shockingly high bill.
- Check your toilets for silent leaks a few times a year using the food coloring test
- Glance at your water meter occasionally when you know no water should be running
- Inspect appliance hoses and shutoff valves for wear or corrosion
- Walk your yard periodically to check for irrigation leaks
- Review your monthly water use so you notice a change early
- Repair small drips as soon as you notice them
- Know where your main water shutoff valve is located in case of an emergency
- Schedule an inspection if warning signs continue even after you’ve checked the obvious spots
When to Call an El Paso Plumber
Most homeowners can rule out the simple causes on their own. But once you’ve checked your fixtures, tested your toilets, and watched the meter with everything off, a hidden leak that still won’t show itself usually needs a professional set of eyes.
If your meter shows water use while every fixture is off, [COMPANY NAME] can inspect your plumbing and help locate the source. Call [PHONE NUMBER] or request service online.
Frequently Asked Questions
Can a leaking toilet cause a very high water bill?
Yes. A worn flapper or fill valve can let water run continuously into the bowl without ever overflowing. Because it’s silent, this type of leak can waste a large amount of water over a full billing cycle before anyone notices it.
Why is my water bill high when I cannot see a leak?
Many leaks happen in places you can’t see, like underground, behind a wall, or under a foundation. The water meter test is one of the most reliable ways to confirm whether water is being used even when everything in the house is off.
How can I tell whether my water meter is showing a leak?
Turn off every fixture and appliance, then check your meter reading or flow indicator. Wait without using water for 30 minutes to an hour, then check again. If the reading changed or the indicator moved, water is flowing somewhere in the system.
Can an underground pipe leak without creating a puddle?
Yes. Soil can absorb water for a while before it ever reaches the surface. A patch of unusually green or damp grass above your water service line is sometimes the only visible clue before a puddle ever forms.
Should I call the water utility or a plumber first?
If you suspect a leak on your side of the meter, a licensed plumber can inspect your plumbing and locate the source. El Paso Water can help with billing questions and possible adjustments, but they generally do not repair private plumbing.
Can El Paso Water adjust a bill caused by a hidden leak?
El Paso Water offers a leak adjustment program for qualifying hidden leaks, based on specific eligibility rules and usage history. Requirements and limits can change, so check the current policy on the official El Paso Water website before assuming your situation qualifies.
