Water hardness in Huntington Beach
10.5 gpg hard
Tap water in Huntington Beach is hard: 10.5 gpg (180 mg/L · 10.1 °dH · 18 °fH).
Source: City of Huntington Beach drinking water quality page (2026) · data checked 2026-10-19
Range across supply zones: 154–205 mg/L.
2 supply zones — hardness varies by neighbourhood; the figure above is the median.
Hardness by district / supply zone
| gpg | mg/L | ||
|---|---|---|---|
| imported water (Colorado River and Northern California) | 9 | 154 | hard |
| local well water | 12 | 205 | very hard |
The city's water page describes two supplies. Local well water averages about 12 gpg (205.4 mg/L), and imported water from the Colorado River and Northern California averages about 9 gpg (154.1 mg/L). The page shows the median of 179.8 mg/L (10.5 gpg). The web page is undated and the linked 2026 report could not be read, so treat both values as approximate.
USGS classes: soft 0–60, moderately hard 61–120, hard 121–180, very hard >180 mg/L.
Water data
| Total hardness | 10.5 gpg |
|---|---|
| Utility | City of Huntington Beach Public Works (Water) |
How Huntington Beach compares
- Tap water in Huntington Beach is 16 % harder than the median of the 1372 cities we track in the United States (9.1 gpg).
- By hardness it ranks 602 of 1372 in the United States (1 = hardest); 56 % of these cities have softer water.
- In California it is number 148 of 336 cities; the regional median is 9.5 gpg.
- Nearest city with clearly softer water: Costa Mesa, 8 km away (6.4 gpg).
- Nearest city with clearly harder water: Westminster, 10 km away (14.4 gpg).
Ranking of the hardest and softest water in the United States →
What it means at home
- Fast scale on taps, shower screens and kettle; white spots on glassware.
- Water heater: efficiency loss and element failures within years if unprotected.
- Dry skin and dull hair after showering are common.
- Softener recommended; jug or reverse osmosis for drinking.
How much salt will you use for softening?
Recommended, especially with a heater or boiler: scale cuts efficiency and shortens its life.
Descale a coffee machine or kettle about every 2 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Huntington Beach
| Brand | Setting for this water |
|---|---|
| Bosch | H02 |
| Miele | 10 °dH |
| AEG / Electrolux | 2 |
| Beko | 3rd |
| Hoover | S2 |
| LG | H2 |
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 Huntington Beach water hard or soft?
It is hard: 180 mg/L as CaCO₃ (10.5 gpg, 10.1 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Huntington Beach 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 Huntington Beach water?
10.5 gpg, equal to 10.1 °dH, 18 °fH or 180 mg/L calcium carbonate.
What dishwasher salt setting should I use in Huntington Beach?
For 180 mg/L (10.1 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in Huntington Beach?
Recommended if you have a water heater, boiler or tankless unit: it saves repairs and detergent.
Source
Source: City of Huntington Beach drinking water quality page (2026). Method: figure published by the water supplier. City of Huntington Beach drinking water quality page · Outdated figure? Tell us