Grantsville Water Hardness & Quality Report (2026)
Water Hardness
14.5 grains per gallon
Source
mixed
pH Level
8.5
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
643.5 mg/L
Est. Daily Cost
$0.66
energy & soap waste
Source: USGS Water Quality Portal · Updated 2026
0–60
mg/L
Soft
61–120
mg/L
Moderately Hard
121–180
mg/L
Hard
180+
mg/L
Very Hard
Appliance Damage Report
In Grantsville, your appliances are currently losing 33% efficiency due to mineral buildup.
| Appliance | In Grantsville | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.5 yrs | 8.5 yrs | -82% |
| Washing Machine | 4.4 yrs | 12 yrs | -63% |
| Water Heater | 5.6 yrs | 15 yrs | -63% |
Regional Water Comparison
How Grantsville compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Grantsville, Utah | 249 mg/L | 3.3 ppt | 🔴 Very Hard | mixed |
| Tooele, Utah | 298 mg/L | 4.1 ppt | 🔴 Very Hard | mixed |
| Magna, Utah | 237 mg/L | 3.2 ppt | 🔴 Very Hard | mixed |
| Oquirrh, Utah | 155.5 mg/L | 1.9 ppt | 🟠 Hard | mixed |
| Herriman, Utah | 284.5 mg/L | 3.9 ppt | 🔴 Very Hard | mixed |
National Benchmark
How Grantsville compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Grantsville | 249 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Grantsville's Water Unique?
Local geology and source profile
Grantsville, Utah, in Tooele County — a Tooele County city adjacent to Tooele and Stansbury Park in the Tooele Valley west of the Wasatch Front — receives its water from the Grantsville City Water Department, drawing from the Tooele Valley wellfield through the northwest Utah distribution.
The very hard 249 mg/L hardness and TDS of 643.5 mg/L reflect the Tooele County supply's very hard Great Basin evaporitic character — the Precambrian Brigham Quartzite provides insoluble dilution, while the Cambrian Ophir Formation contributes calcareous-evaporitic mineral content; Grantsville's groundwater draws from the Tooele Valley basin alluvium where ancient Lake Bonneville lakebed evaporitic sediments concentrate elevated hardness and TDS (compare Tooele UT: 244/632 in Tooele County comparable; Stansbury Park UT: 253/655 in Tooele County comparable; Grantsville consistent very hard from the same Tooele County Tooele Valley Cambrian calcareous evaporitic supply). The Tooele Valley wellfield — Precambrian Brigham Quartzite (insoluble — primary dilutant), Cambrian Ophir Formation (calcareous evaporitic — primary hardness contributor), and Quaternary Lake Bonneville lakebed sediment (evaporitic — TDS contributor).
At 249 mg/L with TDS 644, Grantsville's water is very hard — a water softener is strongly recommended to protect plumbing and appliances. The PFAS level of 3.3 ppt is moderate — a certified drinking water filter provides added protection. Review the Grantsville City Water Department's annual water quality report.
Geology & Source: Grantsville in Tooele County draws from the Grantsville Water on the Deep Creek/Tooele Valley wells (Tooele County, northwest Utah) — the Great Basin at Tooele County draws from Precambrian Brigham Quartzite (insoluble) and Cambrian Ophir Formation (calcareous evaporitic) — Utah Tooele County Tooele Valley Cambrian calcareous evaporitic supply produces very hard water at 249 mg/L with TDS 643.5 mg/L.