Water hardness and quality in Highnam
Page updated · Report periods are shown with each report.
Gloucestershire · South West. Explore the published supply-area report and check your postcode for a supplier-confirmed match.
This is a named-area report associated with Highnam; it does not confirm the supply at every address.
Confirm your address · Check a postcode
A town can span several supply areas. Enter your full postcode to check which supplier and source area serve your address. Matching covers selected suppliers; unsupported areas remain clearly identified.
Your water at a glance
Start with a verified local result
The retained report does not provide measured hardness. Use the supplier’s checker before choosing an appliance setting.
Published quality checks
More context is needed
These labels describe 2024. 7 other parameters have no complete compliance judgement here. They are not a guarantee about an individual tap today.
Understand the reported results ↓Make this useful for your home
Hardness reporting period: Not available · Quality reporting period: 2024
A newer source document is awaiting validation. The figures here remain from the approved period shown. Original supplier report ↗
Drinking-water results
What do the important results mean?
Read the status, sample range and source requirement together. A low average can hide an individual exceedance. Green labels mean the supplier reported no exceedances for that parameter and period; amber calls for source context.
Lead
No numerical limit supplied
Published mean
1.01 µg/l
Source reference: Not supplied
Plumbing can affect lead at an individual tap. An area average cannot rule out a problem with pipes at your property.
8 samples · Range: 0.1 to 7.2 µg/l
This report gives no numerical limit for this parameter. A higher or lower number is not automatically better.
Nitrate
No numerical limit supplied
Published mean
22.3 mg/l
Source reference: Not supplied
A dissolved compound monitored against drinking-water requirements. Its mean, highest reported result and sample count answer different questions.
8 samples · Range: 15.1 to 29 mg/l
This report gives no numerical limit for this parameter. A higher or lower number is not automatically better.
Fluoride
No numerical limit supplied
Published mean
0.08 mg/l
Source reference: Not supplied
Can occur naturally or be added through a fluoridation scheme. The concentration alone does not tell you whether it was added; a lower number is not automatically better.
8 samples · Range: 0.08 to 0.09 mg/l
This report gives no numerical limit for this parameter. A higher or lower number is not automatically better.
For your household
What should you do next?
Find your hardness
Find the supplier’s local hardness result before choosing a setting.
Find your supplierUnderstand treatment options
A filter and a softener do different jobs. Start with the household problem you want to solve.
Filters and limescaleA new change at your tap?
For a new taste, smell, colour or supply problem, check current supplier advice. Annual data is not a live incident feed.
Official supplier help ↗Taste, appearance and mineral content
Chlorine, pH and minerals answer different questions. Calcium and magnesium help describe hardness; chloride is different from treatment chlorine. None is a stand-alone water-quality score.
Chlorine residual
Disinfectant remaining after treatment. It can influence taste and smell; a lower concentration is not automatically better.
See the measurement and context ↓pH
Describes acidity and alkalinity on a scale, rather than an amount of a substance. Where the source gives a range, both its lower and upper bounds matter.
See the measurement and context ↓Has the hardness changed?
History for this reported source area. Only comparable annual statistics appear in the chart; rolling summaries are kept separate. These are not daily tests at your address.
A comparable historical series is not available yet. We will add earlier reports when we can verify their periods and source areas.
Explore all measurements · 7 parameters · 2024
Every result retains its original units, range, sample count and source notes. Comparisons use the reference printed in this report; qualitative references and missing limits are not converted into invented pass/fail judgements. Unlisted substances are not necessarily absent from the water.
Hardness and minerals 1 parameters
Fluoride
No numerical limit supplied
Published mean
0.08 mg/l
Source reference: Not supplied
Can occur naturally or be added through a fluoridation scheme. The concentration alone does not tell you whether it was added; a lower number is not automatically better.
8 samples · Range: 0.08 to 0.09 mg/l
This report gives no numerical limit for this parameter. A higher or lower number is not automatically better.
Original wording and source notes
Source reference: Not supplied. Source parameter: fluoride. Original mean: 0.08 mg/l.
Taste, appearance and treatment 3 parameters
pH
No numerical limit supplied
Published mean
7.4 pH units
Source reference: Not supplied
Describes acidity and alkalinity on a scale, rather than an amount of a substance. Where the source gives a range, both its lower and upper bounds matter.
76 samples · Range: 7.08 to 7.9 pH units
This report gives no numerical limit for this parameter. A higher or lower number is not automatically better.
Original wording and source notes
Source reference: Not supplied. Source parameter: ph. Original mean: 7.4 pH units.
Chlorine residual
No numerical limit supplied
Published mean
0.27 mg/l
Source reference: Not supplied
Disinfectant remaining after treatment. It can influence taste and smell; a lower concentration is not automatically better.
204 samples · Range: 0.03 to 0.6 mg/l
This report gives no numerical limit for this parameter. A higher or lower number is not automatically better.
Original wording and source notes
Source reference: Not supplied. Source parameter: chlorine. Original mean: 0.27 mg/l.
Conductivity
No numerical limit supplied
Published mean
510.63 µS/cm
Source reference: Not supplied
Indicates how readily water conducts electricity, influenced by dissolved ions. It is not a direct measurement of hardness or safety.
76 samples · Range: 290 to 750 µS/cm
This report gives no numerical limit for this parameter. A higher or lower number is not automatically better.
Original wording and source notes
Source reference: Not supplied. Source parameter: conductivity. Original mean: 510.63 µS/cm.
Metals 2 parameters
Lead
No numerical limit supplied
Published mean
1.01 µg/l
Source reference: Not supplied
Plumbing can affect lead at an individual tap. An area average cannot rule out a problem with pipes at your property.
8 samples · Range: 0.1 to 7.2 µg/l
This report gives no numerical limit for this parameter. A higher or lower number is not automatically better.
Original wording and source notes
Source reference: Not supplied. Source parameter: lead. Original mean: 1.01 µg/l.
Iron
No numerical limit supplied
Published mean
5.21 µg/l
Source reference: Not supplied
Can affect water colour, staining and taste. A historical result does not diagnose a change in your tap water today.
76 samples · Range: 4 to 32 µg/l
This report gives no numerical limit for this parameter. A higher or lower number is not automatically better.
Original wording and source notes
Source reference: Not supplied. Source parameter: iron. Original mean: 5.21 µg/l.
Other monitored substances 1 parameters
Nitrate
No numerical limit supplied
Published mean
22.3 mg/l
Source reference: Not supplied
A dissolved compound monitored against drinking-water requirements. Its mean, highest reported result and sample count answer different questions.
8 samples · Range: 15.1 to 29 mg/l
This report gives no numerical limit for this parameter. A higher or lower number is not automatically better.
Original wording and source notes
Source reference: Not supplied. Source parameter: nitrate. Original mean: 22.3 mg/l.
Sources, dates and how to interpret this page
- Reporting period
- 2024
- Source retrieved
- 2026-02-27
- Last verified source check
- 2026-09-12
- Original publication
- Severn Trent Water report ↗
Published area statistics are not a test at your home or a current incident report.
Status labels describe the published parameter and period. Historical exceedances do not automatically establish a current incident. Numerical limits are taken from the original report, not applied indiscriminately across countries, dates or sampling locations. DWI explains how standards work in England and Wales.
Keep this report
Link to ZGL22Saved areas stay on this device. This does not subscribe you to messages or emergency alerts.
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What does this report describe?
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We store daily answer counts, without names or visitor identifiers. Repeated answers can contribute; this is not a representative survey.
Questions about water in Highnam
Is the water in Highnam hard or soft?
The retained Severn Trent Water report for the ZGL22 supply area does not include a measured hardness figure, so we cannot say whether water in Highnam is hard or soft. Missing hardness does not mean soft water: check your postcode with the supplier.
Who supplies water in Highnam?
Severn Trent Water publishes the report for the ZGL22 supply area shown on this page, an area associated with Highnam. Other addresses may differ: check your full postcode or use Severn Trent Water’s water quality information.
How up to date is the water information for Highnam?
Water-quality results come from Severn Trent Water’s 2024 annual report. A newer source document is awaiting validation. These are area summaries, not live tests of your tap; see the original Severn Trent Water report.