Water hardness in Hyrum
12.7 gpg very hard
Tap water in Hyrum is very hard: 12.7 gpg (217 mg/L · 12.2 °dH · 21.7 °fH).
Source: Hyrum City Public Works, CCR Report page (hardness check 15 Mar 2022) (2022) · data checked 2026-11-03
This figure is over 3 years old; hardness may have changed.
Hyrum City Public Works lists a hardness of 217 mg/L (13 grains per gallon) from a check on 15 March 2022. The city tests about every five years, and its 2023 to 2025 annual reports print no hardness figure. So the value is from 2022 and may have shifted since. At this level the water is very hard, and scale on kettles and heaters is likely.
USGS classes: soft 0–60, moderately hard 61–120, hard 121–180, very hard >180 mg/L.
Water data
| Total hardness | 12.7 gpg |
|---|---|
| Utility | Hyrum City Public Works |
How Hyrum compares
- Tap water in Hyrum is 40 % harder than the median of the 1372 cities we track in the United States (9.1 gpg).
- By hardness it ranks 472 of 1372 in the United States (1 = hardest); 65 % of these cities have softer water.
- In Utah it is number 5 of 14 cities; the regional median is 10.9 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 Hyrum
| Brand | Setting for this water |
|---|---|
| Bosch | H04 |
| Miele | 12 °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 Hyrum water hard or soft?
It is very hard: 217 mg/L as CaCO₃ (12.7 gpg, 12.2 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Hyrum 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 Hyrum water?
12.7 gpg, equal to 12.2 °dH, 21.7 °fH or 217 mg/L calcium carbonate.
What dishwasher salt setting should I use in Hyrum?
For 217 mg/L (12.2 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Hyrum?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Hyrum City Public Works, CCR Report page (hardness check 15 Mar 2022) (2022). Method: figure published by the water supplier. Hyrum City Public Works, CCR Report page (hardness check 15 Mar 2022) · Outdated figure? Tell us