Sodium 100 mg/L in Well Water and Low-Sodium Diets

Sodium at 100 mg/L can contribute meaningful daily sodium intake for people who drink a lot of water or follow a sodium-restricted diet. Ask a clinician if this matters for your household.

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Tests to run

Sodium
Chloride
TDS
Hardness

Next steps

Confirm sodium with a certified lab and compare with chloride and TDS.
Review softener settings because ion exchange softeners can add sodium.
Use untreated cold water for drinking if it bypasses the softener and is otherwise safe.
Consider reverse osmosis for drinking water if sodium reduction is needed.

FAQ

Does a water softener add sodium?

Traditional sodium-based softeners exchange hardness minerals for sodium, so softened water can have higher sodium.

Can reverse osmosis remove sodium?

Reverse osmosis can reduce sodium in drinking water when maintained correctly.

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Educational guidance only. Always confirm important decisions with a certified laboratory, local health department, qualified water treatment professional, or clinician.