The billing period
Monthly on some systems, every other month on others, and rarely aligned to a calendar month. A leak starting mid-period looks half as bad as it is, then twice as bad on the next bill.
High water bill →Reading the bill
Water bills across the Valley, and what a leak looks like on one
The Phoenix metro is not served by one water utility but by dozens, each with its own bill layout, billing period and way of grouping usage — which is why comparing your bill to a neighbour’s rarely helps.
Start with the shape, not the total
A leak is a pattern, not a number
The total at the bottom is the least useful part of the bill for this purpose.
Almost every Valley provider puts a usage history on the bill or in an online account — a bar per period, going back a year or more. That history is the most useful leak-detection tool most households already have.
Normal Valley usage has a shape: it climbs through spring, peaks in the hottest months and falls back in autumn, because that curve is the irrigation and the pool answering the weather. A leak puts a step in the history that never comes back down. You are looking for a floor that has risen, not a tall bar.
Read the unit as well. Providers do not all measure in the same one, so check what is printed on your own bill before comparing anything to anything.
What differs between providers
Four things to check
How usage is grouped
Many providers split usage into blocks, some of them seasonal. So a leak does not affect a bill in simple proportion to the water lost.
Why bills jump →How sewer is worked out
Several Valley cities calculate the sewer portion from winter water use and apply that figure to later bills. Goodyear uses January through March and Peoria runs December through March.
Empty houses in winter →The unit of measure
Gallons on some bills, hundred-cubic-feet units on others. Read the unit first.
Rule the pool out →Who bills whom
Municipal, private and irrigation water
City and town utilities
Most of the big names in the Valley run their own water utility and bill their own residents directly — City of Phoenix Water Services, Scottsdale Water, Mesa, Chandler, Gilbert, Glendale, Peoria and Tempe among them. Each sets its own billing period, bill design and usage structure.
Regulated private water companies
Parts of the metro are served by private water companies regulated by the Arizona Corporation Commission rather than by a city — EPCOR Water Arizona, Liberty Utilities and Global Water among them. We will not tell you which company serves your street; the bill is the authority on that.
Irrigation water, billed separately
Flood irrigation is a different supply with its own bill. Salt River Project delivers irrigation water to parts of the Valley, and other irrigation districts — the Roosevelt Water Conservation District among them — serve other areas. SRP’s responsibility ends at its delivery gate: beyond it, the ditches, standpipes, valves and buried laterals are the property owner’s. A losing lateral is not a call to the utility.
The meter
Where it is, and how to make it talk
The meter measures every drop you are billed for, which makes it the referee in any argument about a leak. On most Valley lots it sits in a box in the ground near the footpath, and on some older streets in the alley behind. The lid is usually marked for water and often needs a screwdriver or a meter key. Look before you reach in.
- Turn off everything that uses water: the irrigation controller, the pool equipment, the auto-fill, and nothing running indoors.
- Find the low-flow indicator on the meter face — a small dial, star or triangle that turns at the slightest flow.
- Watch it for a minute or two. Any movement means water is moving on your side of the meter.
- Write the full reading down, photograph it, and read it again an hour later.
Ask your provider about their own policies
Providers handle billing questions, usage history and any adjustment process their own way, and the ones we checked do not all publish the same things. Ask yours directly.
Where the water usually went
Outdoors, almost always
According to City of Phoenix Water Services, most of the water a Valley home uses goes outdoors, and that single fact reorders the whole search. An outdoor leak has no ceiling to stain and no wall to go damp, so it can run for months with the only evidence arriving in the post: irrigation valves and drip runs, a pool auto-fill replacing a loss, and the buried service line between the meter and the house. Which is why the bucket test comes first — it either eliminates the biggest suspect in the yard or identifies it, before anybody drives anywhere.
Straight answers
Bill and meter questions
My bill doubled and nothing changed. What does that mean?
Usually that water is leaving the property somewhere you cannot see. Look at the usage history rather than the total, then run the meter test with everything off. If the low-flow indicator moves, water is going somewhere on your side of the meter.
Can a leak in winter really affect my bills all year?
In some Valley cities, yes, because the sewer portion is worked out from winter water use and applied to later bills. Goodyear uses January to March, Peoria December to March.
Will my provider adjust a bill after a leak is repaired?
Do not assume so, and we will never promise it. Of the Valley providers we checked, Cave Creek was the one publishing a policy we could verify; Phoenix, Glendale, Chandler, Tolleson and EPCOR were each checked and do not publish one. Ask your own provider what they do.
My usage is high but the yard is dry. Where else could it be?
The service line between the meter and the house can lose water into caliche or clay and never show on the surface, and so can a line under a slab or a driveway.
Services this leads to
High Water Bill InvestigationThe bill went up and nothing about the household changed.Underground Leak DetectionBuried supply lines between the meter and the house.Water Main Leak DetectionThe main service line, often under a driveway or front yard.Irrigation & Drip System Leak DetectionWet patches, soggy gravel or a bill that climbed with no change in use.Water Leak DetectionFinding a hidden water leak anywhere on the property.
Tell us what the water is doing
Who bills you, what the usage history looks like and whether the meter moves with everything off. Those three answers get us a long way.
Send us a photo of the usage history
The bar chart on your bill or in your online account often tells us when the loss started, which is half of finding it.
5.0 on Google
What customers in the Phoenix valley have written. The words are theirs, on listings we cannot edit.
“Humberto has been amazing! Prompt, professional, and patient. He has gone above and beyond, taking the time to show me how to operate the water valves and educating me so I can continue to monitor for future leaks. He identified multiple leaks and made thoughtful recommendations.”
“Beto was very professional, thorough and patient in explaining everything he was doing and why. It was an excellent and well worth it experience, and this is saying something for an architect who had a hundred questions!”
“The owner and operator of this company is everything a contractor should be. On time, honest, competent, reachable, comprehensive. Hope to work with him again in the future.”