The Midlands and adjoining areas

Severn Trent Water: water quality and hardness

Severn Trent supplies drinking water across a large regional network and also provides wastewater services. The supplier and the precise water source should be checked for your address rather than inferred from the nearest city.

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

Restrictions: Check the current hosepipe ban status for Severn Trent Water

Find the water serving your home

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

How Severn Trent Water reports on your water

Its official checker offers several reporting windows. The typical hardness summary does not necessarily use the same sampling period as the detailed water-quality table.

Enter your postcode, select the reporting window and keep the zone name. WaterGrade retains the quality period separately from typical hardness when the supplier does not state a hardness sampling period.

Company information and source context ↗

What WaterGrade currently holds

Named areas with records: 218
Areas with measured hardness: 38
Areas with other quality data: 218
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.

Chester and Nottingham have recently verified full reports. Other retained source-area summaries have their own dates and limits; they are not a claim of complete current coverage.

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 City report

97 mg/l as CaCO₃ · hardness period: Not stated by supplier

Quality reporting period: Rolling report 2025-08-01 to 2026-07-31; hardness period not stated. 50 parameters in this publication. Hardness may come from a separate source and period.

Selected source measurements for City
Parameter	Published mean	Samples
Fluoride	<0.04 mg/l	7
Free Chlorine	0.45 mg/l	129
Iron	<11.6 µg/l	50
Lead	<0.24 µg/l	7
Nitrate	<8.91 mg/l	7
pH	7.48 pH value	50

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 City 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

218 areas match · showing 24.

Alfreton

175 mg/l as CaCO₃ · Moderately hard

Hardness period: Not stated by supplier

Quality report: Rolling report 2025-08-01 to 2026-07-31; hardness period not stated · 49 other parameters