Water hardness in Hesperia
4.4 gpg moderately hard
Tap water in Hesperia is moderately hard: 4.4 gpg (75 mg/L · 4.2 °dH · 7.5 °fH).
Source: California SWRCB Division of Drinking Water, EDT lab results, system CA3610024 (2025-02) · data checked 2026-10-19
Range across supply zones: 37–120 mg/L.
The Hesperia figure comes from State Water Resources Control Board lab results for the Hesperia Water District. The median of 31 results from 2021 to 2025, taken at 16 well points, is 75 mg/L as CaCO3 (4.4 gpg), with a range of 37 to 120 mg/L. That is moderately hard water, though wells differ. Scale builds slowly.
USGS classes: soft 0–60, moderately hard 61–120, hard 121–180, very hard >180 mg/L.
Water data
| Total hardness | 4.4 gpg |
|---|---|
| Utility | Hesperia Wd |
How Hesperia compares
- Tap water in Hesperia is 52 % softer than the median of the 1372 cities we track in the United States (9.1 gpg).
- By hardness it ranks 1127 of 1372 in the United States (1 = hardest); 18 % of these cities have softer water.
- In California it is number 278 of 336 cities; the regional median is 9.5 gpg.
- Nearest city with clearly softer water: Coachella, 134 km away (3.2 gpg).
- Nearest city with clearly harder water: Victorville, 16 km away (5.5 gpg).
Ranking of the hardest and softest water in the United States →
What it means at home
- Visible kettle scale every few weeks; vinegar or citric acid is enough.
- Water heater and washing machine: some long-term scale; a scale inhibitor slows it.
- Dishwasher: medium salt setting.
- Softener optional; pays off mainly with a gas boiler or tankless heater.
How much salt will you use for softening?
Optional. A scale inhibitor or a small softener protects the heater; soap savings are modest.
Descale a coffee machine or kettle about every 3 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Hesperia
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 4 °dH |
| AEG / Electrolux | 2 |
| Beko | 1st |
| Hoover | S1 |
| LG | H1 |
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 Hesperia water hard or soft?
It is moderately hard: 75 mg/L as CaCO₃ (4.4 gpg, 4.2 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Hesperia 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 Hesperia water?
4.4 gpg, equal to 4.2 °dH, 7.5 °fH or 75 mg/L calcium carbonate.
What dishwasher salt setting should I use in Hesperia?
For 75 mg/L (4.2 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Hesperia?
Not essential; a scale inhibitor protects the heater cheaply.
Source
Source: California SWRCB Division of Drinking Water, EDT lab results, system CA3610024 (2025-02). Method: own measurement. California SWRCB Division of Drinking Water, EDT lab results, system CA3610024 · Outdated figure? Tell us