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Penistone Water Hardness & Quality Report (2026)

Water Hardness

22.7mg/L
Soft

1.6°Clark2.3°fH1.3°dH

Source

mixed

pH Level

8

neutral = 7.0

Lead

0.002 mg/L

✓ Below action level

TDS

326.6 mg/L

Est. Daily Cost

£0.05

energy & soap waste

Source: DWI Data Portal · Updated 2026

22.7mg/L as CaCO₃Soft

0–99

mg/L

Soft

100–149

mg/L

Slightly Hard

150–199

mg/L

Moderately Hard

200–300

mg/L

Hard

300+

mg/L

Very Hard

Appliance Damage Report

In Penistone, your appliances are currently losing 3% efficiency due to mineral buildup.

ApplianceIn PenistoneSoft Water CityEfficiency Loss
Kettle
8.9 yrs
8.5 yrs
Washing Machine
12.8 yrs
12 yrs
Water Heater
14.7 yrs
15 yrs-2%

Regional Water Comparison

How Penistone compares to its nearest neighbours

CityHardnessClark°RiskSource
Penistone, Yorkshire and the Humber22.7 mg/L1.6°🟢 Softmixed
Stocksbridge, Yorkshire and the Humber22.7 mg/L1.6°🟢 Softmixed
Darton, Yorkshire and the Humber86.7 mg/L6.1°🟢 Softmixed
Barnsley, Yorkshire and the Humber22.7 mg/L1.6°🟢 Softmixed
Horbury, Yorkshire and the Humber39 mg/L2.7°🟢 Softmixed

National Benchmark

How Penistone compares to the United Kingdom average

BenchmarkHardnessAppliance Risk
Penistone22.7 mg/L🟢 None
United Kingdom National Avg177 mg/L🟡 Moderate
Skipton Top Rated7.1 mg/L🟢 None

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What Makes Penistone's Water Unique?

Local geology and source profile

Source: MixedTDS: 326.6 mg/LpH: 8

Yorkshire Water serves the residents of Penistone, drawing from a complex network of surface water reservoirs and rivers, as well as groundwater sources across the Yorkshire and the Humber region. Water is treated at various facilities before distribution. Penistone, situated in South Yorkshire, receives its supply from Yorkshire Water's integrated system. This system draws from diverse sources, ensuring a consistent supply to the area.

The geology beneath the Yorkshire and the Humber region significantly influences water hardness. Eastern areas are supplied by water that has passed through Cretaceous Chalk and Jurassic limestone formations. These mineral-rich rocks allow rainwater to dissolve calcium and magnesium, resulting in hard water. Conversely, the western moorland zones, including parts of the Pennine foothills where Penistone is located, tap into softer water derived from older Carboniferous sandstones and shales.

Homeowners in Penistone can expect hard water, which commonly leads to limescale buildup in kettles, boilers, and shower heads. This scale accumulation can reduce the efficiency and lifespan of water heaters and other appliances. Installing a water softener is a good way to protect plumbing and extend the life of household equipment, especially heating systems and dishwashers. For the most precise information on your local water quality, checking Yorkshire Water's online tools or their official reports is recommended.

Geology & Source: Millstone Grit sandstone and Coal Measures shale; western Carboniferous formations yield soft water, eastern Chalk and Jurassic limestone yield hard water.

Other Yorkshire and the Humber Water Reports

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Frequently Asked Questions

Is Penistone's water safe to drink?
Yes. Penistone's water meets all DWI drinking water standards. The hardness is 22.7 mg/L (Soft), which is safe to drink. High hardness affects appliances and taste, but poses no health risk.
Do I need a water softener in Penistone?
Penistone's water is soft at 22.7 mg/L. A water softener is generally not necessary, though a carbon filter can improve taste and remove any remaining chlorine.
How does Penistone compare to the United Kingdom average?
The United Kingdom national average is 177 mg/L. Penistone (22.7 mg/L) is 154 mg/L below the national average. The softest major city is Skipton at just 7.1 mg/L.