How does Grantsville's water compare to the national average?

The USA national average is 151 mg/L. Grantsville (≈ 120–179 mg/L) is 1 mg/L softer than average.

Grantsville Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

groundwater

pH Level

7.8

neutral = 7.0

Lead

0.005 mg/L

✓ Below action level

TDS

791 mg/L

Est. Daily Cost

$0.40

energy & soap waste

Source: See methodology section below · Updated 2026

hard~120–179 mg/LHard · est.

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 20% efficiency due to mineral buildup.

Appliance	In Grantsville	Soft Water City	Efficiency Loss
Kettle	6.8 yrs	8.5 yrs	-20%
Washing Machine	9.6 yrs	12 yrs	-20%
Water Heater	12 yrs	15 yrs	-20%

Regional Water Comparison

How Grantsville compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Grantsville, Utah	≈ 120–179 mg/L	0 ppt	🟠 Hard	groundwater
Tooele, Utah	≈ 120–179 mg/L	0 ppt	🟠 Hard	groundwater
Magna, Utah	94.7 mg/L	0 ppt	🟡 Moderately Hard	reservoir
Oquirrh, Utah	≈ 180+ mg/L	1.9 ppt	🔴 Very Hard	mixed
Herriman, Utah	≈ 180+ mg/L	17.6 ppt	🔴 Very Hard	reservoir

National Benchmark

How Grantsville compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Grantsville	≈ 120–179 mg/L	🟠 Moderate
USA National Avg	151 mg/L	🟠 Moderate
Scarsdale Top Rated	0.02 mg/L	🟢 None

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What Makes Grantsville's Water Unique?

Local geology and source profile

Source: GroundwaterTDS: 791 mg/LpH: 7.8

Grantsville City Water Utility provides drinking water to about 13,400 residents in Grantsville, Tooele County, Utah. The utility draws primarily from groundwater sources within the Tooele County groundwater system and also utilizes Grantsville Reservoir. Water undergoes treatment at facilities operated by the utility, which adheres to all EPA health guidelines. While generally compliant, one contaminant was reported above EPA health-based guideline levels in a service area. The utility's main office is located at 58 W 1570 N, Tooele, UT 84074, with a 24/7 emergency line available at (435) 884-3411.

The Tooele County groundwater system is part of the Great Basin hydrogeological province. Its geology is characterized by limestone, chalk, and mineral-bearing rock formations native to the area. As water filters through these underground deposits, it picks up dissolved calcium and magnesium carbonates and bicarbonates. This process is typical for Utah's arid interior and results in the hard water supply delivered to Grantsville residents.

Homeowners and businesses in Grantsville will likely notice the effects of hard water, such as scale buildup on faucets and showerheads, and reduced lathering from soaps and detergents. Appliances like water heaters and dishwashers may also be impacted, potentially shortening their lifespan and increasing maintenance needs. Installing a water softener is often recommended to combat these issues, especially for high-demand appliances. Simple measures like regularly descaling fixtures and using water-softening additives can also help manage the impacts of hard water.

Geology & Source: Limestone and mineral-rich formations; calcium and magnesium carbonate deposits cause hardness

Other Utah Water Reports

Tooele

≈ 120–179 mg/L

🟠 Hard

Magna

94.7 mg/L

🟡 Moderately Hard

Oquirrh

≈ 180+ mg/L

🔴 Very Hard

Herriman

≈ 180+ mg/L

🔴 Very Hard

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Notice an error or missing data? Help us keep this page accurate. If you spot incorrect water hardness, outdated utility info, or missing details, please let us know.

All reports are reviewed by our team. Thank you for supporting data quality!

Frequently Asked Questions

Is Grantsville's water safe to drink?

Yes. Grantsville's water meets all federal safety standards. The hardness is ≈ 120–179 mg/L (Hard), which is safe to drink. High hardness affects appliances and taste, but poses no health risk.

Do I need a water softener in Grantsville?

At ≈ 120–179 mg/L (Hard), Grantsville's water will cause significant limescale on kettles, washing machines, and water heaters. A water softener or descaler is strongly recommended to extend appliance lifespan and reduce energy bills by up to 20%.

How does Grantsville compare to the USA average?

The USA national average is 151 mg/L. Grantsville (≈ 120–179 mg/L) is 1 mg/L below the national average. The softest major city is Scarsdale at just 0.02 mg/L.

Data Sources & Methodology

Water quality data for Grantsville is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.

Estimated

Water Hardness

Modelled estimate based on state-level USGS geological survey data for this region. No direct USGS Water Quality Portal measurement was matched to this city — the value reflects a statistical range calibrated to the state's dominant rock types and typical source water characteristics.

Estimated

Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.

Estimated

TDS — Total Dissolved Solids

Estimated using a derived ratio from water hardness and regional conductance profiles. TDS in natural water correlates strongly with total mineral content including hardness ions.

Measured

PFAS — Perfluoroalkyl and Polyfluoroalkyl Substances

EPA UCMR5 (5th Unregulated Contaminant Monitoring Rule, 2023–2025) — sum of PFAS compounds detected at the public water system serving this city. A value of 0 indicates the system was sampled with no detection above reporting limits.

Modelled

Lead

Modelled estimate based on the EPA Lead and Copper Rule 90th-percentile tap-sample methodology. No publicly available per-city lead dataset with sufficient national coverage exists. Values are a conservative baseline derived from city population tier and infrastructure age — all estimates are maintained below the EPA action level of 0.015 mg/L.

Calculated

Appliance Lifespan

Calculated from water hardness using a linear degradation model. Baseline lifespans represent soft-water performance (kettle: 8.5 yrs, washing machine: 12.0 yrs, water heater: 15.0 yrs). Hard water mineral scale progressively reduces operational life in direct proportion to hardness concentration.