Water hardness in Fair Oaks Ranch
10.9 gpg very hard
Tap water in Fair Oaks Ranch is very hard: 10.9 gpg (187 mg/L · 10.5 °dH · 18.7 °fH).
Source: Fair Oaks Ranch Utilities Annual Drinking Water Quality Report 2015 (2015) · data checked 2026-11-03
This figure is over 3 years old; hardness may have changed.
The 187 mg/L (10.9 gpg) figure comes from the 2015 annual water quality report of Fair Oaks Ranch Utilities. It is more than ten years old, so today's value may be different, and we are looking for a newer report. If the current value is close to this one, expect scale on heaters and fixtures.
USGS classes: soft 0–60, moderately hard 61–120, hard 121–180, very hard >180 mg/L.
Water data
| Total hardness | 10.9 gpg |
|---|---|
| Utility | Fair Oaks Ranch Utilities |
How Fair Oaks Ranch compares
- Tap water in Fair Oaks Ranch is 21 % harder than the median of the 1372 cities we track in the United States (9.1 gpg).
- By hardness it ranks 573 of 1372 in the United States (1 = hardest); 58 % of these cities have softer water.
- In Texas it is number 21 of 60 cities; the regional median is 8.6 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 Fair Oaks Ranch
| Brand | Setting for this water |
|---|---|
| Bosch | H03 |
| 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 Fair Oaks Ranch water hard or soft?
It is very hard: 187 mg/L as CaCO₃ (10.9 gpg, 10.5 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Fair Oaks Ranch 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 Fair Oaks Ranch water?
10.9 gpg, equal to 10.5 °dH, 18.7 °fH or 187 mg/L calcium carbonate.
What dishwasher salt setting should I use in Fair Oaks Ranch?
For 187 mg/L (10.5 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Fair Oaks Ranch?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Fair Oaks Ranch Utilities Annual Drinking Water Quality Report 2015 (2015). Method: older figure, source currently unavailable. Fair Oaks Ranch Utilities Annual Drinking Water Quality Report 2015 · Outdated figure? Tell us