Yorkshire

Yorkshire Water: water quality and hardness

Yorkshire Water supplies drinking water and provides wastewater services across its regional network. A county or town name is not a precise supply-zone boundary.

An independent WaterGrade guide. Local readings vary by source area and date.

Restrictions: Check the current hosepipe ban status for Yorkshire Water

Find the water serving your home

This checks the supplying area; it does not assume this company serves every postcode you enter.

How Yorkshire Water reports on your water

Yorkshire’s postcode tool links to water-supply-zone reports. Its guidance explains that water characteristics depend on the source and can vary through the year.

Read the reporting year inside the PDF. A year embedded in a zone’s name can be different. Where total hardness is reported as mg Ca/l, our validated importer converts that hardness figure to mg/l as CaCO₃; it does not convert a separate calcium measurement into hardness.

Company information and source context ↗

What WaterGrade currently holds

Named areas with records: 33
Areas with measured hardness: 33
Areas with other quality data: 33
Areas with annual hardness history: 0

These count our verified records, including historical areas. They are not the company’s current total zones, population coverage or a quality score.

Published full reports currently cover selected verified examples. Raw statistical-area samples are stored separately and are not substituted for postcode readings.

Is the water hard or soft?

Check the figure for your supply zone. A company can deliver water from different sources, so a single average can give the wrong appliance setting for your home. Hardness describes dissolved minerals; it is not a safety rating.

Our local cards use mg/l as calcium carbonate (CaCO₃). Keep the original unit and reporting period when comparing results. Supplier labels can use different hardness bands.

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What do the quality results tell you?

Read each parameter with its units, sample count, range and reporting period. A mean below a reference limit does not establish that every sample complied. A “less than” result is not an exact concentration.

Company-wide performance, local zone results and water at an individual tap are different levels of information. Historical exceedances need the supplier’s investigation context; they are not automatically a current incident.

Understand the measurements in a water report

One named-area example · not a company average

Inside the Sheffield City and Hillsborough 2024 report

48 mg/l as CaCO₃ · hardness period: 2024

Quality reporting period: 2024. 120 parameters in this publication. Hardness may come from a separate source and period.

Selected source measurements for Sheffield City and Hillsborough 2024
Parameter	Published mean	Samples
Residual Disinfectant - Free	0.48 mg/l	108
Fluoride	0.057 mg F/l	8
Hydrogen Ion (pH)	7.54 pH value	36
Iron	<11.58 μg Fe/l	36
Lead	0.306 μg/l	8
Nitrate	<2.4088 mg NO3/l	8

This selected example may not serve your postcode. Open the full report for ranges, source notes, any reported contraventions and the original document.

Read the full Sheffield City and Hillsborough 2024 report →

Find your local source-area report

Use the exact area name from the supplier’s checker. Older areas can have been renamed or replaced. Each card keeps the hardness period separate from other quality data.

Search by the exact source-area nameWith annual hardness history

33 areas match · showing 24.