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Why Does My Water Bill Keep Going up With No Explanation?

Last updated October 26, 2026

The short answer

Check for Hidden Leaks First

A silent leak is the most common reason for a rising water bill. A dripping faucet, a running toilet, or a small crack in a pipe can waste hundreds of gallons each month. You might not notice the water, but the meter keeps spinning. Start by checking your toilet tank for a leak by adding a few drops of food coloring to the tank and waiting a short time without flushing. If color appears in the bowl, you have a leak.

Also inspect areas where pipes run through walls, floors, and crawl spaces. Look for damp spots, discolored drywall, or a musty smell. In a humid climate like Arlington, moisture can hide behind surfaces and go unnoticed. If you find any signs of water, turn off the water supply to that area and call a plumber for a repair. Acting quickly can stop the waste and prevent further damage to your home.

Review Your Water Usage Habits

Sometimes the cause is not a leak but a change in how you use water. A new appliance, a garden hose left running, or an extra person in the home can increase consumption. Look at your water bill over the past year to see if the rise is gradual or sudden. Compare your usage in gallons, not just the dollar amount, because rates can change.

If you have a sprinkler system, check for broken heads or misaligned sprays that water the sidewalk. Also, consider whether you have been filling a pool, watering new grass, or washing your car more often. These activities add up quickly. If your usage seems normal but the bill still climbs, the issue may be with the meter itself.

Test Your Water Meter for Accuracy

A faulty meter can overcount your water usage. To test it, turn off all water inside and outside your home. Check that no toilets are running and no appliances are in use. Then, go to your meter and record the reading. Wait a short period and check again. If the reading changed even though no water was used, you have a leak or a meter problem.

If the meter does not move, the issue might be a misread by the utility company. Contact your water provider to ask for a re-read or to check your meter for errors. Keep a record of your own readings to compare with the bill. If you suspect a leak in your main line, a water damage inspection can help locate it without digging up your yard.

Look for Leaks in Unseen Areas

Leaks under your foundation or in your yard can be easy to miss. A crack in the main water line from the street to your house can waste thousands of gallons. Check for unusually green grass patches, standing water, or a drop in water pressure. These signs may indicate a break in the underground pipe.

If you notice any of these, turn off your main shutoff valve and call a plumber or a water line break cleanup service. They can locate the leak using specialized equipment. In the meantime, keep your shutoff valve location written down so you can act fast in an emergency. Cold weather can cause pipes to shift and crack, so regular checks help.

When to Call in the Pros

If you have checked your toilets, fixtures, and meter but still see no obvious cause, it may be time to have a professional assessment. A water damage assessment can detect moisture hidden in walls, floors, and ceilings using moisture meters and thermal imaging. These tools reveal leaks that are invisible to the naked eye.

The pros can also document the source of the water and help you understand the extent of the problem. This information is useful if you decide to file an insurance claim. Policies vary, and your insurer decides what is covered. A thorough inspection can give you peace of mind and stop the upward trend in your bill before it becomes a bigger issue.

When you call, ask about their process for locating leaks and what you should do next. They can often identify the problem in a single visit, saving you from months of high bills and potential water damage to your home.

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Frequently asked questions

What is the most common cause of a high water bill?

A silent leak, such as a running toilet or a dripping faucet, is the most frequent culprit. These leaks can waste hundreds of gallons monthly without making noise. Check your toilet by adding food coloring to the tank, and inspect your faucets for drips.

Can a water meter be faulty and cause a high bill?

Yes, a meter can malfunction and overcount your usage. To test, turn off all water and record the meter reading. Wait a short period and check again. If the reading changes, you have a leak or a meter issue. Contact your utility provider for a re-read.

Should I worry about a leak under my house?

A leak under your foundation can cause serious damage and high bills. Look for wet spots, mold, or a drop in water pressure. If you suspect a leak, turn off your main valve and call a plumber or a water damage pro to inspect the area.

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