Water Hardness in Gilbert, Arizona
Town of Gilbert Water
Utility-reported range
8–10 GPG
137–171 ppm as calcium carbonate
Source period
Utility FAQ (undated)
Source checked 2026-09-15
What the local data tells you
The utility describes average hardness as 8–10 GPG; this is a typical range, not the minimum and maximum from an annual sampling programme. It also suggests 10–12 GPG for softener settings; check your own measurement and appliance instructions.
Water sources listed for Gilbert: Surface water and groundwater. Source blends, sampling locations and treatment can affect the hardness at a particular property.
The endpoints describe the range published by the utility. We do not treat the midpoint as a measured city average, or assign a value to an individual neighbourhood without supporting data.
Source and coverage
Town of Gilbert water FAQ, water hardnessPublic water system ID: AZ0407092
This is municipal water information, not a test of your home. Check the utility on your water bill, particularly near city boundaries or if you use a private well.
How we verify sources and handle estimatesChoosing a softener for your home
Start with a hardness test on the water entering the softener. Next, estimate the household water use that actually passes through it. Outdoor irrigation is usually a separate demand and should not automatically be included.
A softener needs enough usable exchange capacity between regenerations and enough service flow for fixtures used at the same time. The advertised grain capacity is not necessarily the capacity at an efficient salt setting. Compare the manufacturer's capacity and salt-dose table, ongoing salt use, installation requirements and warranty.