How hard is Sacramento water?

Most Sacramento County tap water is soft to moderately hard, about 2 to 5 grains per gallon (34 to 83 mg/L) on average. That is what the utilities' own water quality reports show. Homes that get water from wells can be harder. In the City of Sacramento the full range runs up to 9 grains per gallon, and some county wells go higher.

Updated October 15, 2026. Every number below comes from a utility's yearly Consumer Confidence Report. Links are in each row.

What do the numbers mean?

Hardness is mostly calcium and magnesium. Reports list it in mg/L, which is the same as ppm. Softener companies use grains per gallon (gpg). To convert, divide mg/L by 17.1.

Scale from the USGS (opens in new tab) and used in the Sacramento County Water Agency report.

Hardness by utility

Where does your water come from? Most Sacramento utilities blend river water and well water, so your number depends on the source that feeds your street and the season.

City of Sacramento figures cover samples from 2023 to 2025, with a full range of 15 to 154 mg/L (0.9 to 9.0 gpg). Sacramento County Water Agency figures cover 2020 to 2023. Its groundwater ranged from 18 to 220 mg/L (1 to 13 gpg).

Other utilities in Sacramento County

We have not yet pulled numbers from these reports. Each link goes to the utility's own page.

• Sacramento Suburban Water District (opens in new tab). Customers may get river water, well water or a blend.
• City of Folsom (opens in new tab)
• Golden State Water, Arden (opens in new tab)
• Elk Grove Water District (opens in new tab)
• Not listed here? Find your water report on the EPA site (opens in new tab).

Why might your water be harder than the average?

An average hides a lot. Is your home fed by a well? Well water in the county ranges far wider than river water. Does it change by season? Several districts add groundwater in summer, when demand goes up. Some websites quote 12 to 15 gpg for all of Sacramento. The utility reports above do not show that as a typical level.

Do you need a water softener?

Many homes on river water do not. A softener makes the most sense if your water comes from wells, if you see white spots and scale, or if a test at your tap shows hard water. Hardness is not a health risk. It is about scale, spots and how long your water heater lasts.

The fastest way to know? Test the water that actually comes out of your tap.

Keep reading

GuideDo I need a water softener with city water in Sacramento?A simple way to decide, using real local numbers. ServiceWater softeners in Sacramento CountyWho needs one in Sacramento, and who can skip it. GuideIs Sacramento tap water safe to drink?What the utility reports say, and what they cannot tell you. ServiceWell water testing in Sacramento CountyPrivate wells are up to you. Here is what to test.

Next steps: Do I need a softener with city water?, water softeners in Sacramento, and is Sacramento water safe to drink? On a well? See well water testing.