Do I need a water softener with city water in Sacramento?
For most Sacramento homes on city water, the honest answer is probably not. River-fed city water here averages about 2 to 5 grains per gallon (gpg). That is soft to moderately hard. Homes that get a lot of groundwater are the exception.
What are the actual numbers?
The City of Sacramento's 2025 report (PDF, opens in new tab) lists these averages. The County Water Agency numbers are in the chart too:
Average hardness by water source
Grains per gallon. Shorter bar means softer water. From each utility report.
The full range was 0.9 to 9.0 gpg. So some homes do get hard water some of the time. County water agency numbers and other utilities are on our Sacramento water hardness page.
A simple way to decide
| Your hardness | What it means | Softener? |
|---|---|---|
| Under 3.5 gpg | Soft | Skip it |
| 3.5 to 7 gpg | Moderately hard | Only if spots and scale bother you |
| Over 7 gpg | Hard | Most people notice the benefit |
Ranges based on the USGS hardness scale (opens in new tab), converted to grains per gallon (mg/L divided by 17.1).
Signs you might be the exception
- White crust on faucets that comes back in a week or two
- Cloudy spots on dishes, even with rinse aid
- Your area gets more groundwater in summer and the spots get worse then
- You are on a private well
What if you are on the fence?
Start with your real number. Test strips cost a few dollars and give a rough reading. A meter test at your tap is more exact. If you land in the middle range, ask yourself what bugs you. If it is mostly drinking water taste, a reverse osmosis system may be the better buy. Read reverse osmosis vs. a softener to compare. If it is scale everywhere, a softener is the fix. And if you want to know what it costs first, see water softener cost.
Know your water before you buy anything
We test hardness, TDS, chlorine and pH at your kitchen sink for free, and you keep a printed report. If you do not need a system, we will tell you.
Book my free water testCommon questions
Do I need a water softener with city water?
Often not in Sacramento. River-fed city water here averages about 2 to 5 grains per gallon, which is soft to moderately hard. A softener makes more sense above about 7 grains per gallon, or if you see heavy spots and scale.
What hardness level needs a softener?
There is no legal line. A common rule of thumb: under 3.5 gpg is soft and does not need one, 3.5 to 7 gpg is a judgment call, and over 7 gpg is hard enough that most people notice the benefit.
Can I test my water hardness myself?
Yes. Hardness test strips are cheap and give a rough number. For an exact reading in grains per gallon, a meter test at your tap is better. We do it free.
Keep reading
ServiceWater softeners in Sacramento CountyWho needs one in Sacramento, and who can skip it.
DataHow hard is Sacramento water?Hardness by utility, from each utility report.
GuideHow much does a water softener cost installed?Installed price ranges, running costs, and what drives the price.
GuideReverse osmosis vs. water softener: which one do you need?They do different jobs. Here is how to pick.