If you’ve opened your latest water bill and wondered why it’s suddenly much higher than normal, you’re not alone. While seasonal changes and increased water usage can contribute to higher bills, an unexpected spike often indicates an underlying plumbing issue.
The good news is that many causes of high water bills can be identified and corrected before they lead to more significant problems or costly water damage.
Let’s take a look at some of the most common reasons your water bill may be higher than usual.
Increased Summer Water Usage
During the summer months, it’s normal for water usage to increase.
Common seasonal activities include:
- Watering lawns and gardens
- Filling swimming pools
- Washing cars
- Running sprinklers
- Additional showers and laundry
If your household is using more water than usual, some increase in your water bill may be expected.
However, if the increase seems excessive, it’s worth investigating further.
A Running Toilet
One of the most common causes of high water bills is a running toilet.
Many homeowners don’t realize that a toilet can continuously waste water without making obvious noise.
In some cases, a running toilet can waste hundreds of gallons of water each day.
Signs of a running toilet include:
- Water movement in the bowl
- Phantom flushing
- A constantly running refill sound
- Unexpected increases in water usage
Replacing a worn flapper or internal component is often a simple fix.
Hidden Plumbing Leaks
Not all plumbing leaks are easy to spot.
Some leaks occur behind walls, beneath floors, or underground where they can go unnoticed for weeks or even months.
Common hidden leak locations include:
- Water supply lines
- Pipe connections
- Crawl spaces
- Basements
- Underground service lines
Even a small leak can waste a surprising amount of water over time.
Leaking Faucets
A dripping faucet may seem minor, but it can contribute to increased water consumption.
A faucet that drips continuously can waste thousands of gallons annually.
Common causes include:
- Worn washers
- Damaged cartridges
- Loose fittings
- Corrosion
Addressing small faucet leaks early can help reduce water waste and prevent future repairs.
Outdoor Faucet and Hose Bib Leaks
Many homeowners overlook outdoor plumbing fixtures.
Leaking hose bibs, garden hose connections, and outdoor faucets can waste substantial amounts of water throughout the summer.
Signs to watch for include:
- Constant dripping
- Wet soil near the faucet
- Reduced water pressure
- Visible corrosion
Outdoor leaks are especially common after winter freeze damage.
Irrigation System Problems
Automatic sprinkler systems are convenient, but they can also contribute to high water bills when something goes wrong.
Common irrigation issues include:
- Broken sprinkler heads
- Underground leaks
- Misaligned spray patterns
- Faulty timers
- Overwatering
Many homeowners don’t notice these problems until they receive their next utility bill.
Water Heater Leaks
A leaking water heater can increase both water and energy costs.
Signs of a potential water heater leak include:
- Water around the base of the tank
- Rust-colored water
- Reduced hot water supply
- Increased utility bills
Because water heater leaks can worsen quickly, they should be inspected as soon as possible.
Underground Water Line Leaks
One of the more serious causes of unusually high water bills is a leak in the underground water service line connecting your home to the municipal supply.
Signs may include:
- Wet patches in the yard
- Unusually green grass
- Reduced water pressure
- Significant increases in water usage
Because these leaks are often hidden underground, professional leak detection is usually required.
How to Check for a Hidden Leak
A simple way to determine whether your home may have a leak is to monitor your water meter.
Try this test:
- Turn off all water fixtures and appliances.
- Avoid using water for several hours.
- Check the water meter before and after.
If the meter continues to move despite no water being used, a leak may be present somewhere in the system.
When Should You Call a Plumber?
If you can’t identify the source of increased water usage, it’s best to have your plumbing system inspected.
Professional leak detection can help locate:
- Hidden pipe leaks
- Underground water line issues
- Running toilets
- Irrigation system leaks
- Fixture problems
The sooner a leak is identified, the less water and money you’ll waste.
How to Prevent High Water Bills
A few simple habits can help reduce unnecessary water usage:
- Repair leaks promptly
- Inspect outdoor faucets seasonally
- Monitor sprinkler systems regularly
- Check toilets for running water
- Watch for unexplained increases in usage
- Schedule plumbing inspections when concerns arise
Preventative maintenance is often far less expensive than repairing water damage caused by an undetected leak.
Trust BMB & Sons for Plumbing Repairs and Leak Detection
At BMB & Sons, we help South Jersey homeowners identify plumbing problems before they become major headaches. Whether you’re dealing with a hidden leak, a running toilet, a leaking faucet, or a water line issue, our experienced team can quickly diagnose the problem and recommend the right solution.
As a family-owned and operated company, we’re committed to providing honest recommendations, dependable service, and quality workmanship you can trust.
If your water bill seems unusually high and you’re not sure why, contact BMB & Sons today to schedule a plumbing inspection.





