Water hardness in Roseville
1.8 gpg soft
Tap water in Roseville is soft: 1.8 gpg (32 mg/L · 1.8 °dH · 3.1 °fH).
Source: California SWRCB Division of Drinking Water, EDT lab results, system CA3110008 (2025-12) · data checked 2026-10-19
Range across supply zones: 23–100 mg/L.
The Roseville figure comes from State Water Resources Control Board lab results for the City of Roseville system. The median of 6 results from 2022 to 2025 is 31.5 mg/L as CaCO3 (1.8 gpg), with a range of 23 to 99.5 mg/L. The sample is small, and the top of the range is in the moderate band. On the median, this is soft water, scale is minor and a softener adds little.
USGS classes: soft 0–60, moderately hard 61–120, hard 121–180, very hard >180 mg/L.
Water data
| Total hardness | 1.8 gpg |
|---|---|
| Utility | City Of Roseville |
How Roseville compares
- Tap water in Roseville is 80 % softer than the median of the 1372 cities we track in the United States (9.1 gpg).
- By hardness it ranks 1276 of 1372 in the United States (1 = hardest); 7 % of these cities have softer water.
- In California it is number 313 of 336 cities; the regional median is 9.5 gpg.
- Nearest city with clearly softer water: Rocklin, 8 km away (1.3 gpg).
- Nearest city with clearly harder water: Antelope, 7 km away (6.1 gpg).
Ranking of the hardest and softest water in the United States →
What it means at home
- Little or no limescale in kettles, water heaters or washing machines.
- Soap lathers easily; water does not dry skin or hair.
- Dishwasher: salt setting at minimum or off.
- No softener needed; a jug filter only changes taste.
How much salt will you use for softening?
No. Water this soft does not need softening.
Descale a coffee machine or kettle about every 6 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Roseville
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 2 °dH |
| AEG / Electrolux | 1 |
| Beko | 1st |
| Hoover | S0 |
| LG | H0 |
From each brand's manual for the model family named in the source; your model may differ, so check its manual. All brands and how to change the setting →
FAQ
Is Roseville water hard or soft?
It is soft: 32 mg/L as CaCO₃ (1.8 gpg, 1.8 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Roseville safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. USGS classes: soft 0–60, moderately hard 61–120, hard 121–180, very hard >180 mg/L.
How many grains per gallon is Roseville water?
1.8 gpg, equal to 1.8 °dH, 3.1 °fH or 32 mg/L calcium carbonate.
What dishwasher salt setting should I use in Roseville?
For 32 mg/L (1.8 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in Roseville?
No. With soft water a softener adds nothing.
Source
Source: California SWRCB Division of Drinking Water, EDT lab results, system CA3110008 (2025-12). Method: own measurement. California SWRCB Division of Drinking Water, EDT lab results, system CA3110008 · Outdated figure? Tell us