Chandler water hardness and the softener it calls for

The City of Chandler gives one citywide range and an average. The average is among the highest of the Valley cities we cover, so a correctly sized softener matters here.

Chandler water hardness by area

Figures published by City of Chandler. The dial setting is the number to enter on your softener.

City or areaHow hardRange (grains per gallon)Softener dial settingSource
ChandlerVery hard5 to 20, average 16.517City of Chandler, water quality questions and answers, undated web page

1. Where do you live?

2. How many people live in your home?

the number your kit shows, in grains per gallon
Your water is
Very hardAbout 190 lb of minerals flow into your home each year
Softener size to buy
32,000-grain
the size number on the box
Salt it will use
About 11
40 lb bags a year
Set the hardness dial to
17
recharges about every 8 days

What the dial setting means

Every softener has a control valve on top with a setting for your water's hardness, usually labelled "hardness" or "grains". Enter this number there. It tells the softener how hard your water is, so it knows when it is full.

"Recharging" (some manuals say "regenerating") is the softener cleaning itself: it rinses its resin beads with salty water to flush out the minerals they have caught. With this setting it happens on its own, about every 8 days in your home, usually at night.

Set the number too low and hard water slips through before the next recharge. Set it too high and the softener recharges early, wasting salt and water.

Chandler's figure is a citywide average; your street can differ. Source: City of Chandler, water quality questions and answers, undated web page.

We don't make, sell or install water softeners or filters, and no company pays to be listed or ranked.

How this figure was measured

Who published it

Water authority
About the authority
The city government that runs Chandler's public water system, including its surface water treatment plant and 32 groundwater wells. A public agency; no company supplied or paid for this figure.
Type of source
Water quality questions-and-answers page published by the utility for its own customers.
Data year
undated web page
Last checked
15 October 2026, against the original document

What the figure is

What was measured
Hardness, in grains per gallon: 5 to 20 grains per gallon (86 to 342 mg/L), average 16.5 (282 mg/L)
Area covered
The whole Chandler water system
How it was sampled
One citywide range (lowest and highest) and a citywide average.
Where the water comes from
About 60 percent from the city's surface water treatment plant, which takes Salt and Verde river water from the Consolidated Canal; about 20 percent from a treatment plant shared with the Town of Gilbert; the rest from 32 city groundwater wells.

How we use it

Figure we use
Published average (16.5 grains per gallon).
Unit conversion
1 grain per gallon = 17.1 milligrams per litre (mg/L), the same as parts per million (ppm)
How we calculate
Daily hardness to remove = people × 75 gallons × grains per gallon. We pick the smallest standard size that lasts about 7 days between recharges, at 3,300 grains removed per pound of salt.
Limits
Hardness varies by street and by season as utilities switch between water sources. A home test result is more exact and overrides this figure.

Where Chandler’s water comes from

According to the City of Chandler, about 60 percent of its water comes from the city’s surface water treatment plant, which draws Salt and Verde river water from the Consolidated Canal. Another 20 percent comes from a treatment plant shared with the Town of Gilbert, and the rest is pumped from 32 city groundwater wells.

An average, not a promise

Chandler publishes one range for the whole city, 5 to 20 grains per gallon, and an average of 16.5. We size with the average. Because the range is so wide, a home test kit is more useful in Chandler than in cities that publish a single zone figure: if your test reads 12, your softener can be smaller and use less salt; if it reads 20, it needs to be bigger.

Sizing a softener for a Chandler home

At 16.5 grains per gallon the calculator gives a 32,000-grain softener for three people and a 40,000-grain one for four, each recharging about every 8 days. A five-person household moves up to 48,000 grains and roughly 17 bags of salt a year. Chandler water softener installers should be working from a similar figure; if a quote is far bigger, ask why.

How Chandler compares

Chandler’s average is above Phoenix’s published range midpoint (about 13.8) and Mesa’s City Zone (about 12), and close to Mesa’s Eastern and Southern Zones (about 16).

Common questions

Does Chandler have hard water?
Yes. The City of Chandler gives a range of 5 to 20 grains per gallon with an average of 16.5, which is very hard on the U.S. Geological Survey scale.
Why does Chandler's hardness range so widely?
Chandler blends several supplies: about 60 percent from its surface water treatment plant, about 20 percent from a plant it shares with the Town of Gilbert, and the rest from 32 city wells. The city publishes one range covering all of them rather than figures by area.
Should I test my water in Chandler?
It is worth it here. With a citywide range of 5 to 20, your street could be well above or below the average. Enter your result in the calculator and it replaces the city figure.