Why Your Water Bill Spikes in Summer — And How Your Sprinkler System May Be to Blame

Every summer, Omaha homeowners open their MUD bill and do a double take. The number is significantly higher than it was in spring, and for most households with a sprinkler system, irrigation is the primary reason. Some of that increase is completely normal — your lawn genuinely needs more water in July than it does in April. But sometimes the spike is larger than it should be, and the culprit is a sprinkler system that's running inefficiently, running when it shouldn't be, or quietly leaking underground without any visible signs on the surface.

Here's how to make sense of your summer water bill, what a normal increase looks like versus a sign that something is wrong, and what you can do about it.

How much water does a sprinkler system actually use?

The numbers surprise most homeowners when they see them laid out. A typical residential sprinkler system in Omaha flows at roughly 15 gallons per minute. On a standard five-zone system — two spray zones running 15 minutes each and three rotor zones running 30 minutes each — that adds up to approximately 1,800 gallons per cycle. If your system runs three days per week through July and August, you're looking at roughly 21,600 gallons of water per month dedicated entirely to irrigation. At MUD's current residential rates, that translates to a meaningful addition to your monthly bill — and that's for a system that's running exactly as intended. If something is wrong with your system, that number can climb significantly higher without you realizing it.

What a normal summer bill increase looks like

A reasonable rule of thumb for Omaha homeowners is that your water bill during peak irrigation season — typically June through August — will run two to three times higher than your winter baseline when your sprinkler system is off. If your winter bill is $40 to $50 per month and your summer bill climbs to $90 to $130, that's generally within the normal range for a properly functioning five-zone system.

If your summer bill is climbing to $200, $250, or higher — or if it jumped dramatically compared to the same month last year with no obvious change in how you're watering — that's a signal worth investigating. Abnormal bill spikes almost always have a cause, and in most cases it's something your irrigation system is doing rather than something in your household.

The most common causes of abnormally high water bills

A stuck or partially open valve is one of the most common and most expensive causes of unexpectedly high water bills. Zone valves are designed to open when your controller signals a watering cycle and close completely when the cycle ends. When a valve fails to close fully — due to debris in the diaphragm, a worn solenoid, or a mechanical failure — that zone runs continuously or seeps water constantly even when your system isn't scheduled. Depending on how many heads are in that zone, a stuck-open valve can waste thousands of gallons per day without producing any visible puddles if the water is soaking into the ground gradually.

A broken or missing sprinkler head is another common culprit. A head that's been struck by a lawn mower, cracked by foot traffic, or simply worn out can produce an uncontrolled stream of water rather than a controlled spray pattern. These are often more visible than valve issues — you may notice a small geyser or an unusually wet area in your lawn — but they can go unnoticed for days or weeks if they're in an area you don't regularly walk through.

An underground mainline leak is the most serious and often the hardest to detect. The mainline is the pipe that runs from your backflow preventer to your valve manifold and carries water under constant pressure whenever your water supply is on. A crack or failed fitting in the mainline can leak continuously — not just during watering cycles — and the water often travels along the pipe and soaks into the soil without surfacing. Signs include unusually soft or wet ground in an area that shouldn't be wet, a section of lawn that's greener than everything around it, or a water meter that's moving even when nothing in your house is running.

How to check your meter for a leak

Your MUD water meter is one of the most useful diagnostic tools available to you and most homeowners never use it. Here's a quick test that takes about two minutes.

Turn off every water-using fixture in your house — faucets, dishwasher, washing machine, and your irrigation system. Make sure your sprinkler controller is in the off position, not just between cycles. Then go to your water meter, which is typically located near the street in a small covered box, and look at the dial or digital readout. If the meter is moving at all while everything is off, water is flowing somewhere it shouldn't be. The faster it's moving, the larger the leak.

If your meter is moving and everything inside is off, call us. That's an active leak that's costing you money every minute it runs. Our team can diagnose the source quickly during a service visit and get it repaired before your next bill arrives.

How a rain sensor and Wi-Fi module reduce your bill

Two of the most cost-effective upgrades you can make to an existing sprinkler system pay for themselves directly through reduced water consumption. A rain sensor prevents your system from running after rainfall, eliminating unnecessary cycles that add to your bill without benefiting your lawn. In a typical Omaha summer with regular storm activity, a rain sensor can prevent 15 to 30 cycles per season — a meaningful reduction in water usage that shows up directly on your MUD bill.

A Wi-Fi module goes further by monitoring local evapotranspiration rates and automatically adjusting your run times based on actual weather conditions rather than a fixed schedule. On a mild, overcast day it runs less. During a heat wave it adjusts to compensate. The result is a system that uses exactly as much water as your lawn needs and no more. Both devices qualify for a $75 rebate from MUD, making them even easier to justify. Visit our installation page to learn more about both options.

The bottom line

A higher water bill in summer is expected — but it should be proportional to what your lawn actually needs. If your bill seems higher than it should be, a quick meter check and a zone-by-zone walk of your system can often identify the problem in minutes. If you find something that doesn't look right or you're not sure what you're looking at, our team at Alternate Rain is here to help.

Give us a call at (402) 289-4019 or contact us online to schedule a repair or inspection visit. And if you're enrolled in our Seasonal Care Package, your mid-season check is the perfect time to catch anything that might be driving your bill higher than it needs to be.