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Big Spring Water (Montana)

Big Spring Water is bottled by Lehrkinds in Lewistown, Montana, from Big Spring near the town; the bottler also sells distilled water. The spring water is moderately hard and rich in calcium and sulfate. — as described by the brand

9.6/10Waterphile Score9/9 properties published

pH8.1 ideal 6.5–8.59.6
TDS287 mg/L ideal 225–500 mg/L9.8
Sodium2 mg/L ideal up to 20 mg/L10.0
Calcium68 mg/L ideal 36.7–80 mg/L · counts half9.6
Magnesium20 mg/L ideal 16.7–30 mg/L · counts half9.8
Sulfate84 mg/L ideal up to 248 mg/L10.0
ChlorideND mg/L ideal up to 250 mg/L10.0
Nitrate0.97394 mg/L as N ideal up to 10 mg/L10.0
Bicarbonate197 mg/L ideal 30–396.6 mg/L · counts half10.0

Each bar is out of 10 for that property. Deductions: −0.3 for an analysis over 3 years old. Editorial score, not a health rating. How scores work →

Mineral FactsPer litre · 10 of 11 values published

Basics

8.1

Total dissolved solids TDS

287 mg/L

Minerals

Calcium

68 mg/L

Magnesium

20 mg/L

Sodium

2 mg/L

Potassium

Not detected

Other dissolved substances

Bicarbonate

197 mg/L

Sulfate

84 mg/L

Chloride

Not detected

Nitrate (NO₃)

0.22 mg/L as N

Silica

6 mg/L

— Not published by the brand · we never estimateSource: Energy Laboratories analytical report B18101762 for Lehrkinds Big Spring, sample 'Drinking', collected 2018-10-19 (hosted by Consumer Reports) · checked 2026-10-26

Sample 'Drinking' (the spring water), collected 19 Oct 2018 (mg/L): calcium 68, magnesium 20, sodium 2, potassium ND, bicarbonate 197, sulfate 84, chloride ND, fluoride 0.6, nitrate+nitrite-N 0.22, silica 6.0; TDS 287; pH 8.1; total alkalinity 161 as CaCO3. The same report covers the bottler's distilled water (everything ND, pH 5.9). Analysis over 3 years old.

How it stands out

Sodium is 2 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.

Suitable for a low-sodium diet (sodium < 20 mg/L)

Taste notes

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

Ratings & reviews

Waterphile Score lab data

9.6/10

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 Big Spring Water (Montana)’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	Big Spring, Lewistown, Montana (Lehrkinds Big Spring Water)
Country	USA · all waters from the USA
Water type	Spring water · what this means
Still or sparkling	Still
Data source	Energy Laboratories analytical report B18101762 for Lehrkinds Big Spring, sample 'Drinking', collected 2018-10-19 (hosted by Consumer Reports) 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

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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.