Windermere: your water explained
Published results for this named supply area. Your address may be served by a different area.
Confirm your address · Check a postcode
Check your full postcode before assuming this area report describes the water serving your address.
Your water at a glance
Soft water. Know your mineral level.
This figure helps you choose appliance settings. Hardness describes dissolved minerals and does not establish whether every water-quality requirement was met.
22 mg/l as CaCO₃
Soft ≤100 · Slightly hard ≤150 · Moderately hard ≤200 · Hard ≤300 · Very hard >300 mg/l. DWI hardness bands; not safety grades.
Published quality checks
More context is needed
These labels describe Rolling 12 months; updated 2026-09-04. 45 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: Rolling 12 months; updated 2026-09-04 · Quality reporting period: Rolling 12 months; updated 2026-09-04
Appliance settings · Convert hardness units
0.22 mmol/l
A conversion of the published hardness, not another test. Follow your appliance’s model-specific instructions.
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.
E. coli
Mean at or below the source limit
Published mean
0 number/100ml
Source reference: 0 number/100ml
A microbiological indicator. The reported sample results and any failures matter more than an average bacterial count.
54 samples · Range: 0 to 0 number/100ml
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
Lead
Reported upper bound at or below the limit
Published mean
<0.550 µg Pb/l
Source reference: 10 µg Pb/l
Plumbing can affect lead at an individual tap. An area average cannot rule out a problem with pipes at your property.
11 samples · Range: <0.550 to <0.550 µg Pb/l
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
“<” is part of the source result. It is not an exact concentration or a measured zero.
Nitrate
Reported upper bound at or below the limit
Published mean
<2.26 mg NO3/l
Source reference: 50 mg NO3/l
A dissolved compound monitored against drinking-water requirements. Its mean, highest reported result and sample count answer different questions.
9 samples · Range: <2.04 to <2.44 mg NO3/l
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
“<” is part of the source result. It is not an exact concentration or a measured zero.
Fluoride
Reported upper bound at or below the limit
Published mean
<0.270 mg F/l
Source reference: 1.5 mg F/l
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.
72 samples · Range: <0.270 to <0.270 mg F/l
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
“<” is part of the source result. It is not an exact concentration or a measured zero.
For your household
What should you do next?
Check appliance settings
Match the hardness unit to your dishwasher manual. Settings depend on the model.
Dishwasher guideUnderstand 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.
Free 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 ↓Calcium
A naturally occurring mineral that contributes to hardness. Calcium alone is not the same measurement as total hardness.
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 · 48 parameters · Rolling 12 months; updated 2026-09-04
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.
Parameters without their own explanation: A substance monitored in this supplier report. The source reference, units, sample range and any reported failures provide its context; the number alone is not a water-quality rating.
Source note on 48 of these parameters: “Supplier reports 0% of samples failing its requirement. This is a historical percentage, not a current incident or a reconstructed failure count.”
Hardness and minerals 8 parameters
Alkalinity
No numerical limit supplied
Published mean
15.0 mg/l
Source reference:
How strongly water resists a change in acidity. This helps describe its chemistry; it is different from pH and total hardness.
11 samples · Range: 12.7 to 18.9 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: . Source parameter: Alkalinity as CaCO3. Original mean: 15.0 mg/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Calcium
No numerical limit supplied
Published mean
7.32 mg Ca/l
Source reference:
A naturally occurring mineral that contributes to hardness. Calcium alone is not the same measurement as total hardness.
30 samples · Range: 4.63 to 9.06 mg Ca/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: . Source parameter: Calcium. Original mean: 7.32 mg Ca/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Chloride
Reported upper bound at or below the limit
Published mean
<14.8 mg Cl/l
Source reference: 250 mg Cl/l
A dissolved salt component that can influence taste at higher concentrations. It is different from chlorine used in treatment.
36 samples · Range: <12.3 to <18.3 mg Cl/l
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
“<” is part of the source result. It is not an exact concentration or a measured zero.
Original wording and source notes
Source reference: 250. Source parameter: Chloride. Original mean: <14.8 mg Cl/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Fluoride
Reported upper bound at or below the limit
Published mean
<0.270 mg F/l
Source reference: 1.5 mg F/l
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.
72 samples · Range: <0.270 to <0.270 mg F/l
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
“<” is part of the source result. It is not an exact concentration or a measured zero.
Original wording and source notes
Source reference: 1.5. Source parameter: Fluoride. Original mean: <0.270 mg F/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Total hardness
No numerical limit supplied
Published mean
22 mg CaCO3/l
Source reference:
Dissolved calcium and magnesium affect limescale and appliance settings. This is a mineral description, not a safety score.
30 samples · Range: 15 to 27 mg CaCO3/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: . Source parameter: Hardness Total as CaCO3. Original mean: 22 mg CaCO3/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Magnesium
No numerical limit supplied
Published mean
0.906 mg Mg/l
Source reference:
A naturally occurring mineral that contributes to hardness alongside calcium.
30 samples · Range: 0.830 to 1.05 mg 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: . Source parameter: Magnesium. Original mean: 0.906 mg Mg/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Sodium
Mean at or below the source limit
Published mean
5.54 mg Na/l
Source reference: 200 mg Na/l
A dissolved salt component. Compare the water measurement with its source reference; it is not a measure of your total dietary salt intake.
11 samples · Range: 4.84 to 7.83 mg Na/l
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
Original wording and source notes
Source reference: 200. Source parameter: Sodium. Original mean: 5.54 mg Na/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Sulphate
Mean at or below the source limit
Published mean
7.74 mg SO4/l
Source reference: 250 mg SO4/l
A dissolved mineral component monitored in water-quality reports. Read its concentration alongside the source reference.
36 samples · Range: 5.13 to 9.41 mg SO4/l
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
Original wording and source notes
Source reference: 250. Source parameter: Sulphate. Original mean: 7.74 mg SO4/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Taste, appearance and treatment 6 parameters
Free chlorine residual
No numerical limit supplied
Published mean
0.84 mg/l
Source reference:
Disinfectant remaining after treatment. It can influence taste and smell; a lower concentration is not automatically better.
55 samples · Range: 0.36 to 1.07 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: . Source parameter: Residual chlorine - Free. Original mean: 0.84 mg/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Colour
Reported upper bound at or below the limit
Published mean
<1.93 mg/l Pt/Co scale
Source reference: 20 mg/l Pt/Co scale
A measure of water colour under test conditions. A new change at your tap should be checked with your supplier.
30 samples · Range: <1.75 to <2.08 mg/l Pt/Co scale
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
“<” is part of the source result. It is not an exact concentration or a measured zero.
Original wording and source notes
Source reference: 20. Source parameter: Colour. Original mean: <1.93 mg/l Pt/Co scale.
Source note: printed once above this list (the same note appears on 48 parameters).
Conductivity
Mean at or below the source limit
Published mean
65.8 uS/cm at 20oC
Source reference: 2500 uS/cm at 20oC
Indicates how readily water conducts electricity, influenced by dissolved ions. It is not a direct measurement of hardness or safety.
30 samples · Range: 57.8 to 75.7 uS/cm at 20oC
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
Original wording and source notes
Source reference: 2500. Source parameter: Conductivity. Original mean: 65.8 uS/cm at 20oC.
Source note: printed once above this list (the same note appears on 48 parameters).
Total organic carbon
No numerical limit supplied
Published mean
0.975 mg C/l
Source reference:
A broad measure of organic carbon used to understand water and treatment. It does not identify an individual contaminant.
36 samples · Range: 0.790 to 1.66 mg C/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: . Source parameter: Total organic carbon. Original mean: 0.975 mg C/l.
Source note: printed once above this list (the same note appears on 48 parameters).
pH
Reference needs source context
Published mean
7.39 pH value
Source reference: 9.5
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.
62 samples · Range: 7.11 to 7.92 pH value
The supplied reference cannot be safely compared numerically with this reading. Check its units and the complete source requirement; no pass/fail judgement is inferred.
Original wording and source notes
Source reference: 9.5. Source parameter: Hydrogen ion (pH). Original mean: 7.39 pH value.
Source note: printed once above this list (the same note appears on 48 parameters).
Turbidity
Reported upper bound at or below the limit
Published mean
<0.15 NTU
Source reference: 4 NTU
Measures cloudiness caused by suspended particles. It cannot identify their cause on its own.
29 samples · Range: <0.10 to <0.20 NTU
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
“<” is part of the source result. It is not an exact concentration or a measured zero.
Original wording and source notes
Source reference: 4. Source parameter: Turbidity. Original mean: <0.15 NTU.
Source note: printed once above this list (the same note appears on 48 parameters).
Metals 13 parameters
Aluminium
Mean at or below the source limit
Published mean
13.5 µg Al/l
Source reference: 200 µg Al/l
Monitored as part of water-quality testing and treatment control. Compare with the reference and sample results in the source.
29 samples · Range: 9.00 to 21.9 µg Al/l
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
Original wording and source notes
Source reference: 200. Source parameter: Aluminium. Original mean: 13.5 µg Al/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Antimony
Reported upper bound at or below the limit
Published mean
<0.319 µg Sb/l
Source reference: 5 µg Sb/l
A trace element monitored in drinking water. The source reference and sample results provide the relevant comparison.
9 samples · Range: <0.310 to <0.330 µg Sb/l
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
“<” is part of the source result. It is not an exact concentration or a measured zero.
Original wording and source notes
Source reference: 5. Source parameter: Antimony. Original mean: <0.319 µg Sb/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Arsenic
Reported upper bound at or below the limit
Published mean
<0.480 µg As/l
Source reference: 10 µg As/l
A trace element monitored against a drinking-water requirement. Use the source results and units rather than taste or appearance to interpret it.
9 samples · Range: <0.480 to <0.480 µg As/l
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
“<” is part of the source result. It is not an exact concentration or a measured zero.
Original wording and source notes
Source reference: 10. Source parameter: Arsenic. Original mean: <0.480 µg As/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Boron
Reported upper bound at or below the limit
Published mean
<0.0170 mg B/l
Source reference: 1 mg B/l
A dissolved element monitored in drinking water. The source reference applies to the parameter and units shown here.
35 samples · Range: <0.0127 to <0.0199 mg B/l
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
“<” is part of the source result. It is not an exact concentration or a measured zero.
Original wording and source notes
Source reference: 1. Source parameter: Boron. Original mean: <0.0170 mg B/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Cadmium
Reported upper bound at or below the limit
Published mean
<0.0900 µg Cd/l
Source reference: 5 µg Cd/l
A trace metal monitored in drinking water. A less-than result reports an upper bound, not a measured zero.
9 samples · Range: <0.0900 to <0.0900 µg Cd/l
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
“<” is part of the source result. It is not an exact concentration or a measured zero.
Original wording and source notes
Source reference: 5. Source parameter: Cadmium. Original mean: <0.0900 µg Cd/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Chromium
Reported upper bound at or below the limit
Published mean
<0.830 µg Cr/l
Source reference: 50 µg Cr/l
A trace metal monitored in drinking-water reports. Keep the source’s chemical definition and units when comparing results.
9 samples · Range: <0.830 to <0.830 µg Cr/l
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
“<” is part of the source result. It is not an exact concentration or a measured zero.
Original wording and source notes
Source reference: 50. Source parameter: Chromium. Original mean: <0.830 µg Cr/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Copper
Reported upper bound at or below the limit
Published mean
<0.0339 mg Cu/l
Source reference: 2 mg Cu/l
Can be influenced by plumbing. The area report does not replace investigation of a problem at an individual property.
11 samples · Range: <0.0104 to 0.0948 mg Cu/l
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
“<” is part of the source result. It is not an exact concentration or a measured zero.
Original wording and source notes
Source reference: 2. Source parameter: Copper. Original mean: <0.0339 mg Cu/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Iron
Reported upper bound at or below the limit
Published mean
<8.72 µg Fe/l
Source reference: 200 µg Fe/l
Can affect water colour, staining and taste. A historical result does not diagnose a change in your tap water today.
30 samples · Range: <2.10 to 28.3 µg Fe/l
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
“<” is part of the source result. It is not an exact concentration or a measured zero.
Original wording and source notes
Source reference: 200. Source parameter: Iron. Original mean: <8.72 µg Fe/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Lead
Reported upper bound at or below the limit
Published mean
<0.550 µg Pb/l
Source reference: 10 µg Pb/l
Plumbing can affect lead at an individual tap. An area average cannot rule out a problem with pipes at your property.
11 samples · Range: <0.550 to <0.550 µg Pb/l
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
“<” is part of the source result. It is not an exact concentration or a measured zero.
Original wording and source notes
Source reference: 10. Source parameter: Lead. Original mean: <0.550 µg Pb/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Manganese
Reported upper bound at or below the limit
Published mean
<1.51 µg Mn/l
Source reference: 50 µg Mn/l
Can affect colour and deposits. Any reported exceedance needs the supplier’s investigation context.
30 samples · Range: <0.370 to 5.19 µg Mn/l
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
“<” is part of the source result. It is not an exact concentration or a measured zero.
Original wording and source notes
Source reference: 50. Source parameter: Manganese. Original mean: <1.51 µg Mn/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Mercury
Reported upper bound at or below the limit
Published mean
<0.130 µg Hg/l
Source reference: 1 µg Hg/l
A trace metal monitored against drinking-water requirements. Keep detection limits separate from exact measurements.
36 samples · Range: <0.130 to <0.130 µg Hg/l
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
“<” is part of the source result. It is not an exact concentration or a measured zero.
Original wording and source notes
Source reference: 1. Source parameter: Mercury. Original mean: <0.130 µg Hg/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Nickel
Reported upper bound at or below the limit
Published mean
<0.914 µg Ni/l
Source reference: 20 µg Ni/l
A monitored metal that can be influenced by materials in contact with water. Local plumbing and sampling context matter.
11 samples · Range: <0.770 to 2.26 µg Ni/l
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
“<” is part of the source result. It is not an exact concentration or a measured zero.
Original wording and source notes
Source reference: 20. Source parameter: Nickel. Original mean: <0.914 µg Ni/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Selenium
Reported upper bound at or below the limit
Published mean
<0.850 µg Se/l
Source reference: 10 µg Se/l
A trace element monitored in drinking water. Its presence alone does not establish that a requirement was exceeded.
9 samples · Range: <0.850 to <0.850 µg Se/l
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
“<” is part of the source result. It is not an exact concentration or a measured zero.
Original wording and source notes
Source reference: 10. Source parameter: Selenium. Original mean: <0.850 µg Se/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Microbiology 3 parameters
Coliform bacteria
Mean at or below the source limit
Published mean
0 number/100ml
Source reference: 0 number/100ml
Used to monitor water-system hygiene. Interpret detections with the supplier’s sampling location and investigation notes.
54 samples · Range: 0 to 0 number/100ml
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
Original wording and source notes
Source reference: 0. Source parameter: Coliform bacteria. Original mean: 0 number/100ml.
Source note: printed once above this list (the same note appears on 48 parameters).
E. coli
Mean at or below the source limit
Published mean
0 number/100ml
Source reference: 0 number/100ml
A microbiological indicator. The reported sample results and any failures matter more than an average bacterial count.
54 samples · Range: 0 to 0 number/100ml
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
Original wording and source notes
Source reference: 0. Source parameter: E.coli. Original mean: 0 number/100ml.
Source note: printed once above this list (the same note appears on 48 parameters).
Enterococci
Mean at or below the source limit
Published mean
0 number/100ml
Source reference: 0 number/100ml
A microbiological indicator assessed through sample results. Read any reported failures with the supplier’s investigation notes.
9 samples · Range: 0 to 0 number/100ml
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
Original wording and source notes
Source reference: 0. Source parameter: Enterococci. Original mean: 0 number/100ml.
Source note: printed once above this list (the same note appears on 48 parameters).
Other monitored substances 18 parameters
Ammonium (ammonia and ammonium ions)
Reported upper bound at or below the limit
Published mean
<0.0442 mg NH4/l
Source reference: 0.5 mg NH4/l
About this parameter: see the note above this list.
9 samples · Range: <0.0322 to <0.0540 mg NH4/l
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
“<” is part of the source result. It is not an exact concentration or a measured zero.
Original wording and source notes
Source reference: 0.5. Source parameter: Ammonium (ammonia and ammonium ions). Original mean: <0.0442 mg NH4/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Benzene
Reported upper bound at or below the limit
Published mean
<0.0811 µg/l
Source reference: 1 µg/l
About this parameter: see the note above this list.
35 samples · Range: <0.0780 to <0.0830 µg/l
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
“<” is part of the source result. It is not an exact concentration or a measured zero.
Original wording and source notes
Source reference: 1. Source parameter: Benzene. Original mean: <0.0811 µg/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Benzo(a)pyrene
Reported upper bound at or below the limit
Published mean
<0.0020 µg/l
Source reference: 0.01 µg/l
About this parameter: see the note above this list.
11 samples · Range: <0.0020 to <0.0020 µg/l
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
“<” is part of the source result. It is not an exact concentration or a measured zero.
Original wording and source notes
Source reference: 0.01. Source parameter: Benzo(a)pyrene. Original mean: <0.0020 µg/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Bromate
Reported upper bound at or below the limit
Published mean
<0.702 µg BrO3/l
Source reference: 10 µg BrO3/l
About this parameter: see the note above this list.
10 samples · Range: <0.640 to <1.01 µg BrO3/l
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
“<” is part of the source result. It is not an exact concentration or a measured zero.
Original wording and source notes
Source reference: 10. Source parameter: Bromate. Original mean: <0.702 µg BrO3/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Residual chlorine - Total
No numerical limit supplied
Published mean
0.89 mg/l
Source reference:
About this parameter: see the note above this list.
55 samples · Range: 0.43 to 1.15 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: . Source parameter: Residual chlorine - Total. Original mean: 0.89 mg/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Colony counts after 3 days at 22 deg C
No numerical limit supplied
Published mean
10 number/1ml
Source reference:
About this parameter: see the note above this list.
31 samples · Range: 0 to >300 number/1ml
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: . Source parameter: Colony counts after 3 days at 22 deg C. Original mean: 10 number/1ml.
Source note: printed once above this list (the same note appears on 48 parameters).
Clostridium perfringens (including spores)
Mean at or below the source limit
Published mean
0 number/100ml
Source reference: 0 number/100ml
About this parameter: see the note above this list.
9 samples · Range: 0 to 0 number/100ml
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
Original wording and source notes
Source reference: 0. Source parameter: Clostridium perfringens (including spores). Original mean: 0 number/100ml.
Source note: printed once above this list (the same note appears on 48 parameters).
Cyanide
Reported upper bound at or below the limit
Published mean
<3.91 µg CN/l
Source reference: 50 µg CN/l
About this parameter: see the note above this list.
36 samples · Range: <3.91 to <3.91 µg CN/l
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
“<” is part of the source result. It is not an exact concentration or a measured zero.
Original wording and source notes
Source reference: 50. Source parameter: Cyanide. Original mean: <3.91 µg CN/l.
Source note: printed once above this list (the same note appears on 48 parameters).
1,2-dichloroethane
Reported upper bound at or below the limit
Published mean
<0.161 µg/l
Source reference: 3 µg/l
About this parameter: see the note above this list.
35 samples · Range: <0.130 to <0.180 µg/l
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
“<” is part of the source result. It is not an exact concentration or a measured zero.
Original wording and source notes
Source reference: 3. Source parameter: 1,2-dichloroethane. Original mean: <0.161 µg/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Nitrite
Reported upper bound at or below the limit
Published mean
<0.0089 mg NO2/l
Source reference: 0.5 mg NO2/l
A nitrogen compound monitored in water supplies. Requirements can depend on where the sample was collected; use the reference printed in this report.
9 samples · Range: <0.0076 to <0.0099 mg NO2/l
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
“<” is part of the source result. It is not an exact concentration or a measured zero.
Original wording and source notes
Source reference: 0.5. Source parameter: Nitrite. Original mean: <0.0089 mg NO2/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Nitrate
Reported upper bound at or below the limit
Published mean
<2.26 mg NO3/l
Source reference: 50 mg NO3/l
A dissolved compound monitored against drinking-water requirements. Its mean, highest reported result and sample count answer different questions.
9 samples · Range: <2.04 to <2.44 mg NO3/l
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
“<” is part of the source result. It is not an exact concentration or a measured zero.
Original wording and source notes
Source reference: 50. Source parameter: Nitrate. Original mean: <2.26 mg NO3/l.
Source note: printed once above this list (the same note appears on 48 parameters).
(Nitrate)/50 plus (nitrite)/3
Mean at or below the source limit
Published mean
0.0238 mg/l
Source reference: 1 mg/l
About this parameter: see the note above this list.
9 samples · Range: 0.0160 to 0.0310 mg/l
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
Original wording and source notes
Source reference: 1. Source parameter: (Nitrate)/50 plus (nitrite)/3. Original mean: 0.0238 mg/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Odour (quantitative)
Mean at or below the source limit
Published mean
0 dilution number at 25oC
Source reference: 0 dilution number at 25oC
About this parameter: see the note above this list.
28 samples · Range: 0 to 0 dilution number at 25oC
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
Original wording and source notes
Source reference: 0. Source parameter: Odour (quantitative). Original mean: 0 dilution number at 25oC.
Source note: printed once above this list (the same note appears on 48 parameters).
Polycyclic aromatic hydrocarbons (sum of 4 PAHs)
Mean at or below the source limit
Published mean
0.0000 µg/l
Source reference: 0.1 µg/l
About this parameter: see the note above this list.
10 samples · Range: 0.0000 to 0.0000 µg/l
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
Original wording and source notes
Source reference: 0.1. Source parameter: Polycyclic aromatic hydrocarbons (sum of 4 PAHs). Original mean: 0.0000 µg/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Taste (quantitative)
Mean at or below the source limit
Published mean
0 dilution number at 25oC
Source reference: 0 dilution number at 25oC
About this parameter: see the note above this list.
26 samples · Range: 0 to 0 dilution number at 25oC
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
Original wording and source notes
Source reference: 0. Source parameter: Taste (quantitative). Original mean: 0 dilution number at 25oC.
Source note: printed once above this list (the same note appears on 48 parameters).
Tetrachloromethane
Reported upper bound at or below the limit
Published mean
<0.496 µg/l
Source reference: 3 µg/l
About this parameter: see the note above this list.
10 samples · Range: <0.380 to <0.670 µg/l
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
“<” is part of the source result. It is not an exact concentration or a measured zero.
Original wording and source notes
Source reference: 3. Source parameter: Tetrachloromethane. Original mean: <0.496 µg/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Trihalomethanes - Total
Mean at or below the source limit
Published mean
21.5 µg/l
Source reference: 100 µg/l
About this parameter: see the note above this list.
10 samples · Range: 14.0 to 36.4 µg/l
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
Original wording and source notes
Source reference: 100. Source parameter: Trihalomethanes - Total. Original mean: 21.5 µg/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Tetrachloroethene and trichloroethene
Mean at or below the source limit
Published mean
0.0000 µg/l
Source reference: 10 µg/l
About this parameter: see the note above this list.
10 samples · Range: 0.0000 to 0.0000 µg/l
Compliance detail is unavailable. This summary alone does not establish that every sample complied.
Original wording and source notes
Source reference: 10. Source parameter: Tetrachloroethene and trichloroethene. Original mean: 0.0000 µg/l.
Source note: printed once above this list (the same note appears on 48 parameters).
Sources, dates and how to interpret this page
- Reporting period
- Rolling 12 months; updated 2026-09-04
- Source retrieved
- 2026-09-11
- Last verified source check
- 2026-09-11
- Original publication
- United Utilities report ↗
Official supplier report for this supply zone, retrieved with postcode LA23 1BT. Town pages that cite this zone show their own supplier-confirmed example postcode. This is an example supply area, not a measurement at every address in the towns it serves.
The supplier describes a rolling 12-month window updated weekly. Its update date is not an exact sampling-period end date. Overlapping rolling windows are not annual trend points.
All published numeric parameters are retained, including censored readings and historical failures. These results are not a statement about current incidents.
Supplier reports 0% of samples failing its requirement. This is a historical percentage, not a current incident or a reconstructed failure count.
Hardness: 30 samples · reported range 15 to 27 mg CaCO3/l.
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.
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Town pages for this source area
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