A water bill that jumps without explanation can point to the sprinkler system. Irrigation can use a lot of water, and small problems can add up quickly.
The cause may be a leak, a valve that isn’t closing, broken heads or simply a schedule that waters more than needed.
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Quick Answer
Sprinkler-related high water bills usually come from a hidden leak (especially on the mainline), a valve that won’t close fully, broken heads, or a controller that waters too often or too long. Start by checking the schedule and watching the yard while each zone runs.
What You May Be Seeing
- A water bill much higher than usual
- Soggy areas in the yard
- Water running into the street
- A zone that keeps running
- Sprinklers running more often than expected
- Low pressure in a zone
Leaks on the pressurized side of the system and valves that don’t close can waste water around the clock, while scheduling problems waste water every time the system runs.
The First Question to Ask
Is there a visible problem, or does everything look normal?
Visible water, broken heads or a running zone point to a repair. If everything looks normal, check the schedule and watch for hidden leaks.
If You See Water Where It Shouldn’t Be
A leak or failed part is likely.
Common causes include:
- Broken head: gushing or misdirected spray
- Lateral or mainline leak: soggy or bubbling areas
- Valve not closing: a zone that keeps running
If Everything Looks Normal
The cause may be hidden or schedule-related.
Common causes include:
- Schedule waters too often: multiple start times or programs
- Run times too long: more water than needed
- Hidden mainline leak: water lost underground
- Valve seeping: water passing through slowly
The Bill Jumped Suddenly
A sudden increase usually points to a new leak, a stuck valve or a broken head.
The Bill Has Crept Up Over Time
Gradual increases may come from schedule changes, added programs or small leaks that are getting worse.
The Sprinklers Seem to Run Twice
Extra start times or overlapping programs can double watering. See our guide on sprinklers running twice.
What You Can Check Yourself
- Review the controller’s programs, start times and run times
- Watch each zone run and look for broken heads or leaks
- Look for soggy areas or water in the street
- Check whether any zone keeps running after its cycle
- Watch the water meter with all water off, if you can read it
What a Technician May Test
- Zone-by-zone inspection
- Leak detection
- Valve inspection
- Controller and schedule review
Most Common Causes
- Mainline or lateral leak
- Valve not closing
- Broken heads
- Too many start times or programs
- Run times too long
Repair or Replace?
Most causes of high water use are fixed with a targeted repair or a schedule adjustment. A system inspection can help when the cause isn’t obvious.
When to Call a Sprinkler Professional
Call a professional if:
- The bill jumped and you can’t find a cause
- The area stays wet with the system off
- A zone keeps running
- You suspect a hidden leak
Find a sprinkler repair pro or read our emergency shutoff guide if water won’t stop.
Related Sprinkler Problems
- How Do I Know If I Have an Underground Sprinkler Leak?
- Why Is My Sprinkler System Leaking?
- Why Won’t My Sprinkler Zone Shut Off?
- Why Are My Sprinklers Running Twice?
- Why Is My Sprinkler Valve Leaking?
Related Repairs
- Sprinkler System Inspection
- Sprinkler Leak Repair
- Sprinkler Valve Repair
- Sprinkler System Adjustment
Typical Repair Cost
What you pay depends on the cause, the parts and your area. See our Sprinkler System Inspection Cost Guide for typical ranges. Prices vary, and only an on-site diagnosis can give you an actual quote.
Frequently Asked Questions
Can a sprinkler leak cause a high water bill?
Yes. Leaks on the mainline or at valves can leak around the clock.
How do I know if my sprinkler is causing my high water bill?
Check the schedule, watch each zone run and look for leaks or a zone that keeps running.
Can my sprinkler schedule raise my water bill?
Yes. Extra start times, overlapping programs and long run times all add up.
What should I do first?
Review the controller schedule and look for visible leaks. If you can’t find the cause, a system inspection can help.
Bottom Line
A sprinkler system can raise a water bill through leaks, stuck valves, broken heads or an overactive schedule.
If the cause isn’t obvious, a technician can inspect each zone, check the valves and look for hidden leaks.
Diagnose My Sprinkler Problem See Typical Repair Cost Find a Sprinkler Pro
