Water hardness in Newport Beach
11.5 gpg very hard
Tap water in Newport Beach is very hard: 11.5 gpg (198 mg/L · 11.1 °dH · 19.8 °fH).
Source: California SWRCB Division of Drinking Water, EDT lab results, system CA3010023 (2026-05) · data checked 2026-10-19
Range across supply zones: 50–437 mg/L.
The Newport Beach figure comes from State Water Resources Control Board lab results for the City of Newport Beach system. The median of 16 results from 2022 to 2026, taken at 4 well points, is 197.5 mg/L as CaCO3 (11.5 gpg), but results run from 49.8 to 436.5 mg/L. The water is very hard on median and varies a lot by well and date. Ask the city which supply reaches your address.
USGS classes: soft 0–60, moderately hard 61–120, hard 121–180, very hard >180 mg/L.
Water data
| Total hardness | 11.5 gpg |
|---|---|
| Utility | City Of Newport Beach |
How Newport Beach compares
- Tap water in Newport Beach is 27 % harder than the median of the 1372 cities we track in the United States (9.1 gpg).
- By hardness it ranks 533 of 1372 in the United States (1 = hardest); 61 % of these cities have softer water.
- In California it is number 126 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: Tustin, 17 km away (17.9 gpg).
Ranking of the hardest and softest water in the United States →
What it means at home
- Severe scale: heater elements and washing-machine heaters fail early.
- Detergent use is very high; taps and screens coat within days.
- Dishwasher at maximum salt setting.
- An ion-exchange softener is practically essential; RO for drinking water.
How much salt will you use for softening?
Yes. At this hardness a softener pays for itself through appliance life and detergent.
Descale a coffee machine or kettle about every 1 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Newport Beach
| Brand | Setting for this water |
|---|---|
| Bosch | H03 |
| Miele | 11 °dH |
| AEG / Electrolux | 3 |
| 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 Newport Beach water hard or soft?
It is very hard: 198 mg/L as CaCO₃ (11.5 gpg, 11.1 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Newport 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 Newport Beach water?
11.5 gpg, equal to 11.1 °dH, 19.8 °fH or 198 mg/L calcium carbonate.
What dishwasher salt setting should I use in Newport Beach?
For 198 mg/L (11.1 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Newport Beach?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: California SWRCB Division of Drinking Water, EDT lab results, system CA3010023 (2026-05). Method: own measurement. California SWRCB Division of Drinking Water, EDT lab results, system CA3010023 · Outdated figure? Tell us