Key Takeaway
A water bill that jumps 30% or more with no change in how you use water almost always means a hidden leak - most often a running toilet, an irrigation line, or a slab leak under your foundation. Shut off every fixture and watch your water meter's leak dial: if it moves, water is escaping somewhere. In the Permian Basin, hard water and slab foundations make under-slab pinhole leaks especially common.
First, Run the 5-Minute Water Meter Test
Before you assume a billing error, prove whether you have a leak. It takes five minutes and no tools. Turn off every water-using fixture and appliance in and around the house - faucets, the washing machine, the dishwasher, the ice maker, and the irrigation system. Then walk out to your water meter, usually in a concrete box near the curb or the front of the property in most Odessa and Midland neighborhoods.
Lift the lid and look for the small triangular or star-shaped dial (the leak indicator). With everything shut off, that dial should be perfectly still. If it is spinning, creeping, or twitching, water is moving through your meter right now - which means you have a leak somewhere between the meter and your fixtures. For a slower confirmation, write down the meter reading, leave the water off for one to two hours, and check it again. Any change means water is escaping.
This simple test is the fastest way to separate a real leak from a temporary spike (a month with house guests, filling a pool, or a hot summer of extra irrigation). If the dial moves with everything off, skip the guesswork and get professional water leak detection - a licensed plumber can pinpoint the source without tearing up your home.
The Most Common Hidden Leaks Behind a High Water Bill
In our experience across the Permian Basin, the same handful of culprits are behind almost every high water bill. The sneakiest is a running toilet. A worn flapper or fill valve lets water trickle from the tank into the bowl 24 hours a day, and because it is nearly silent, homeowners often go months without noticing. According to the EPA, a single running toilet can waste up to 200 gallons a day - enough to move your bill by $30 to $70 a month on its own.
Irrigation and outdoor lines are the next biggest offender in West Texas, where sprinkler systems run hard eight months a year. A cracked lateral line, a stuck valve, or a broken sprinkler head buried in a flower bed can dump water into the ground where you never see it. A leaking hose bib or outdoor spigot does the same thing on a smaller scale.
Inside the house, dripping faucets and a failing water heater add up quietly. A tank water heater that has started to weep from a fitting or the tank itself can run continuously. And the most serious hidden leak of all is a slab leak - a break in a copper supply line running under your concrete foundation, which we cover in detail below.
| Hidden Leak | Water Wasted | Typical Monthly Cost | How to Spot It |
|---|---|---|---|
| Running toilet | Up to 200 gal/day | $30-$70 | Dye tablet in tank; phantom refills |
| Irrigation line/valve | 50-500+ gal/day | $20-$150 | Wet or greener spots in the yard |
| Dripping faucet | 5-20 gal/day | $2-$10 | Visible drip; stained sink |
| Water heater tank | 20-100 gal/day | $10-$40 | Puddle or rust near the base |
| Slab leak | 50-500+ gal/day | $25-$200 | Warm floor; sound of running water |
When a High Water Bill Means a Slab Leak
If you have ruled out toilets, fixtures, and irrigation and the meter is still spinning, the leak is likely underground - either in the yard water line between the meter and the house, or under the slab itself. A slab leak is one of the more expensive problems to ignore because the water is escaping beneath your foundation, where it can erode soil and eventually cause the slab to shift.
The classic warning signs that point to a slab leak rather than a simpler leak are a warm or hot spot on the floor (from a leaking hot-water line), the faint sound of running water when every fixture is off, a drop in water pressure, and new cracks in flooring or drywall. Damp or warped spots on carpet or tile without an obvious source are another red flag.
Slab leaks are unusually common here. Permian Basin municipal water runs 15 to 25 grains per gallon of hardness, which corrodes copper supply lines from the inside and creates the pinhole leaks that show up under slabs. Combine that with the expansive caliche soil common across Odessa and Midland, and you have the exact conditions that stress under-slab piping. If your high water bill lines up with any of these signs, get slab leak detection before the damage spreads.
How Much a Leak Really Costs You
It is easy to underestimate a small leak because the drip looks harmless, but the meter runs around the clock. The EPA estimates that household leaks waste nearly one trillion gallons of water nationwide every year, and that the average home's undetected leaks can account for 10,000 gallons annually - roughly the amount needed to wash 270 loads of laundry.
In West Texas, where water is metered and increasingly expensive, that waste shows up fast. A leak large enough to move your bill by $50 a month is costing you $600 a year, and that number climbs every billing cycle you wait. A slab leak or yard line leak that runs at higher volume can add $100 to $200 a month while quietly causing structural damage that costs far more to repair than the water itself.
The math almost always favors fixing the leak now. Professional detection is a small, one-time cost compared to months of inflated bills plus the eventual damage a hidden leak causes to drywall, flooring, cabinets, or a foundation.
What to Do If You Find (or Suspect) a Leak
If the meter test confirms water is moving with everything off, start by isolating the source. Shut off the toilet supply valves one at a time and re-check the meter - if the dial stops, you have found your leak. Turn off the irrigation system at its controller and main valve to rule out sprinklers. If you can see or hear the leak, or you find a puddle near the water heater, you have your answer.
If the meter keeps moving after you have isolated the obvious fixtures, the leak is hidden - in a wall, underground, or under the slab - and that is where professional equipment pays for itself. We use acoustic and electronic leak detection to pinpoint the exact spot without jackhammering your whole floor or digging up the entire yard, so the repair is targeted and the cost stays down.
If you suspect a major leak and water is actively causing damage, shut off your home's main water valve (usually near the meter or where the line enters the house) to stop the loss, then call (432) 290-8511. Resolv Services is a licensed, local plumbing company - TX Master Plumber License #42668 - and we offer free estimates on leak detection and repair across Odessa, Midland, and the Permian Basin.