Renal Diet

Tap water (municipal): potassium, phosphorus and sodium

One serving of tap water (municipal) (1 cup (8 fl oz), 237 g) has about 2 mg potassium, 0 mg phosphorus, 7 mg sodium and 0.0 g protein, according to USDA FoodData Central (FDC id 175103).

Nutrients per serving and per 100 g

Tap water (municipal): USDA valuesServing: 1 cup (8 fl oz) = 237 g. Per serving = per 100 g x grams / 100, rounded for display.
Nutrient Per serving (237 g) Per 100 g
Potassium (mg) 2 1
Phosphorus (mg) 0 0
Sodium (mg) 7 3
Protein (g) 0.0 0.0
Energy (kcal) 0 0

Source

USDA description
Beverages, water, tap, municipal
USDA FDC id
175103 (opens the USDA record)
Dataset
USDA FoodData Central - SR Legacy (CSV), release 2018-04
USDA category
Beverages
License
Public domain (CC0 1.0)

How this compares with published guidance

Under 200 mg At 2 mg potassium per serving, this is under the 200 mg line that the National Kidney Foundation (Potassium in Your CKD Diet, updated May 5, 2023) uses for its comparison "low" column.

The 200 mg line applies to a serving, and the serving here is the USDA household portion listed above, which may not match the serving size used on other lists. NKF gives no daily potassium target. Your own limit comes from your care team.

Phosphorus. NKF (Phosphorus and Your CKD Diet) gives no per-serving cutoff, so no label is applied to 0 mg. See where it sits on the phosphorus ranking.

Phosphorus additives matter for processed versions: NKF says phosphorus from additives is completely absorbed. A prepared or packaged version of this food may differ from the USDA value above.

USDA portions

USDA household portions for Tap water (municipal)Nutrients computed from the same per 100 g values. The first portion is the standard serving used elsewhere on this site.
Portion Grams Potassium (mg) Phosphorus (mg) Sodium (mg)
1 cup (8 fl oz) standard serving 237 207
1 fl oz 29.6 001
1 bottle 8 fl oz 237 207
1 liter 1000 10030
3 ice cube (3/4 fl oz) 64 102

Similar foods in drinks

Closest potassium per serving within the same food group. Different serving sizes, so compare the grams too.

Track your own numbers against your own limits

Renal Diet adds up potassium, phosphorus, sodium, protein and fluid from an offline USDA food database, with the source on every value. No account, no scanner. You enter the limits your care team gave you, and "Can I eat this?" shows a traffic light against what is left today. A PDF report is there for your dietitian. Free to start; some features may need an optional premium subscription.

Values are USDA reference values for a standard serving. Your limits are set by your nephrologist or dietitian. Processed foods and phosphorus additives may differ. This is not medical advice.