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Blue Keld

Blue Keld is an artesian natural mineral water from the chalk of the Yorkshire Wolds; 'keld' is the old Norse word for spring. — as described by the brand

8.5/10Waterphile Score8/9 properties published

pHNot published −0.1—
TDS298 mg/L ideal 225–500 mg/L9.9
Sodium9.3 mg/L ideal up to 20 mg/L10.0
Calcium95 mg/L ideal 36.7–80 mg/L · counts half7.3
Magnesium4.3 mg/L ideal 16.7–30 mg/L · counts half5.0
Sulfate9.9 mg/L ideal up to 248 mg/L10.0
Chloride17.8 mg/L ideal up to 250 mg/L10.0
Nitrate21.2 mg/L ideal up to 10 mg/L5.3
Bicarbonate261 mg/L ideal 30–396.6 mg/L · counts half10.0

Each bar is out of 10 for that property. Deductions: −0.1 for missing values, −0.1 for an undated analysis. Editorial score, not a health rating. How scores work →

Mineral FactsPer litre · 10 of 11 values published

Basics

—

Total dissolved solids dry residue 180°C

298 mg/L

Minerals

Calcium

95 mg/L

Magnesium

4.3 mg/L

Sodium

9.3 mg/L

Potassium

1.6 mg/L

Other dissolved substances

Bicarbonate

261 mg/L

Sulfate

9.9 mg/L

Chloride

17.8 mg/L

Nitrate (NO₃)

21.2 mg/L

Silica

7.9 mg/L

— Not published by the brand · we never estimateSource: British Bottled Water Producers (association) – brand profile, typical analysis mg/L (undated) · checked 2026-10-26

Association profile: Na 9.3, Ca 95, Mg 4.3, K 1.6, NO3 21.2, Cl 17.8, SO4 9.9, F 0.188, SiO2 7.9, HCO3 261, Fe 0.008, dry residue 298 mg/L. No pH given.

How it stands out

Sodium is 9.3 mg/L, under the 20 mg/L level the UK/EU uses for “suitable for a low-sodium diet” on natural mineral water labels.

UK/EU label thresholds met

Applied to the published numbers for information; these indications legally apply to natural mineral water labels.

Low mineral content (fixed residue ≤ 500 mg/L)
Suitable for a low-sodium diet (sodium < 20 mg/L)

Taste notes

No taste notes yet. Soon you will be able to say how Blue Keld tastes to you. Results will appear here once people have voted; nothing is shown until then.

SoftNo votes
CrispNo votes
SmoothNo votes
MineralNo votes
SaltyNo votes
SweetNo votes
BitterNo votes
MetallicNo votes

Ratings & reviews

Waterphile Score lab data

8.5/10

From the brand’s published mineral values. How it works

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Similar waters

Computed from published numbers only: the waters whose mineral values are closest to Blue Keld’s on a log scale, using the values both brands publish as single numbers (at least 5). pH and nitrate are not used. Similar minerals do not mean similar taste.

Source & spring

Source	Blue Keld artesian spring, Cranswick, edge of the Yorkshire Wolds (chalk), England
Country	UK (England) · all waters from the UK
Water type	Natural mineral water · what this means
Still or sparkling	Still
Data source	British Bottled Water Producers (association) – brand profile, typical analysis mg/L (undated) Last checked 2026-10-26

Brands update their analyses from time to time, and values can differ between bottle sizes, plants and batches. Check the label on your bottle. Spotted a change? See corrections.

Where to buy

See the official Blue Keld website for stockists. Retailer and price links are coming later.

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Not medical advice. Waterphile shows mineral values as published by each brand, for general information only. If you have a health condition, follow a restricted diet or prepare infant formula, ask a doctor, pediatrician or health visitor.