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Mount Desert Spring Water

Mount Desert Spring Water is a family spring-water delivery company on Mount Desert Island in Maine. — as described by the brand

8.1/10Waterphile Score8/9 properties published

pH6.1 ideal 6.5–8.57.2
TDS160 mg/L ideal 225–500 mg/L7.3
Sodium29 mg/L ideal up to 20 mg/L8.4
Calcium19 mg/L ideal 36.7–80 mg/L · counts half5.0
Magnesium3.7 mg/L ideal 16.7–30 mg/L · counts half5.0
Sulfate9.6 mg/L ideal up to 248 mg/L10.0
Chloride55 mg/L ideal up to 250 mg/L10.0
Nitrate3.9843 mg/L as N ideal up to 10 mg/L10.0
BicarbonateNot published −0.1—

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 · 7 of 11 values published

Basics

6.1

Total dissolved solids TDS

160 mg/L

Minerals

Calcium

19 mg/L

Magnesium

3.7 mg/L

Sodium

29 mg/L

Potassium

—

Other dissolved substances

Bicarbonate

—

Sulfate

9.6 mg/L^*

Chloride

55 mg/L

Nitrate (NO₃)

0.9 mg/L as N^*

Silica

—

^* Nitrate (NO₃): Listed as 'Nitrate 0.9' against a limit of 10, the federal limit for nitrate as nitrogen, so stored as nitrate-N.

^* Sulfate: Scanned page reads '9. 6mg/l', taken as 9.6 mg/L.

— Not published by the brand · we never estimateSource: Mount Desert Spring Water quality report (company website printout of 28 Feb 2019, hosted by Consumer Reports) · checked 2026-10-26

Company quality page (printed 28 Feb 2019), analysis undated: pH 6.1, TDS 160, Ca 19, Mg 3.7, Na 29, sulfate 9.6, chloride 55, nitrate 0.9 (as N), alkalinity 40 mg/L CaCO3, conductivity 260. No analysis date, so the recency penalty applies.

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

8.1/10

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 Mount Desert Spring Water’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	Southwest Harbor, Mount Desert Island, Maine
Country	USA · all waters from the USA
Water type	Spring water · what this means
Still or sparkling	Still
Data source	Mount Desert Spring Water quality report (company website printout of 28 Feb 2019, hosted by Consumer Reports) Last checked 2026-10-26
Note on Nitrate (NO₃)	Listed as 'Nitrate 0.9' against a limit of 10, the federal limit for nitrate as nitrogen, so stored as nitrate-N.
Note on Sulfate	Scanned page reads '9. 6mg/l', taken as 9.6 mg/L.

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.