Why Your Water Bill Suddenly Increased Even Though Nothing Changed

While seasonal factors such as summer irrigation can increase water consumption, a sudden unexplained spike in your water bill often indicates that water is being used somewhere without your knowledge.

Sometimes the cause is easy to identify. Other times, the problem can remain hidden for weeks or even months. Although pinpointing the location of a hidden leak can be difficult without professional help, determining that a leak exists is relatively easy to do.

First, Make Sure Water Usage Actually Increased

Before assuming there is a plumbing problem, it is worth checking whether your water usage actually increased.

Review your current bill and compare it to previous months. Contact your water provider to confirm your home actually used more water during the billing period, because mistakes can happen on their end.

In some cases, a longer billing cycle, municipal rate increase or unusually high seasonal water use may account for part of the change.

If it’s not some billing mix-up or change and your water usage did increase significantly despite no obvious changes in household habits, you should investigate further.

Running Toilets Are One of the Most Common Causes

A running toilet is one of the most common causes of unexpectedly high water bills.

Problems such as worn flappers, faulty fill valves or leaking seals can allow water to continuously move from the tank into the bowl. In some cases, the toilet may run constantly. In others, it may refill every few minutes.

Running toilets are one of the easiest causes to diagnose. They’re too loud to be missed completely, especially at night in a quiet house when you’re trying to sleep. If you have a running toilet, you would very likely know about it before you open a high water bill.

Irrigation Systems Can Use More Water Than Intended

Sprinkler systems are another common source of unexpected water consumption, particularly during Arlington and Fort Worth summers.

Potential Irrigation System Causes

• A zone valve that becomes stuck open
• Controller programming changes
• Multiple watering cycles being scheduled accidentally
• Failed rain sensors
• Broken sprinkler heads that discharge excessive amounts of water

Diagnosing irrigation-related problems often involves checking for unusually wet areas, irrigation activity at unexpected times or water meter movement when the system should not be running.

Because irrigation systems operate outdoors and often on automatic schedules, problems can sometimes go unnoticed for extended periods.

Hidden Plumbing Leaks

Not every plumbing leak leaves obvious signs of water damage.

Leaks behind walls, beneath floors, in attics or underground can waste substantial amounts of water before they become visible.

Potential warning signs include:

• Rising water bills
• Damp drywall or flooring
• Musty odors
• Low water pressure
• Water meter movement when no fixtures are being used
• The sound of running water when everything is turned off

Unlike running toilets, hidden leaks can be difficult to diagnose without professional equipment or inspection.

Slab Leaks Can Be Especially Difficult to Identify

Slab leaks occur when water lines beneath a concrete foundation develop leaks.

Because the pipes are concealed beneath the home, these leaks can sometimes continue for long periods before obvious symptoms appear.

Potential warning signs include:

• Unexplained increases in water bills
• Warm spots on flooring
• The sound of running water
• Cracks in flooring or foundation
• Water meter movement when all fixtures are off

Water Softeners and Other Equipment Problems

Water treatment equipment can also contribute to unexpected water usage.

A malfunctioning water softener, for example, may regenerate more frequently than intended or fail to complete cycles properly. Certain filtration systems, valves and plumbing accessories can also allow water to flow continuously under the wrong conditions.

These problems are generally less common than running toilets or hidden leaks, but they can still contribute to higher utility bills.

How to Tell If Water Is Still Running Somewhere

One of the simplest ways to begin troubleshooting is by checking your water meter.

Turn off all faucets, appliances, irrigation systems and fixtures that use water. Then observe the water meter. If it continues to register usage, water may still be flowing somewhere within the plumbing system.

While this test cannot identify the source of the problem, it can help confirm whether water is actively being used when it should not be.

If You Know Something Is Wrong, Call an Arlington Plumber

A sudden increase in your water bill does not always indicate a major plumbing problem, but it is usually worth performing the water meter test. If the test confirms something is leaking, it’s best to call a plumber as soon as possible.

The plumbers at Tom’s Mechanical are always on standby to provide emergency leak repair. We have the equipment and know-how to find leaks and get them repaired quickly. Call 817-277-4493 to schedule plumbing service.